Intsimbi Engagqwaliyo ye-304 vs 316: Umahluko oPhambili kunye neendleko

Umahluko ophambili phakathi kwentsimbi engagqwaliyo engama-304 kunye ne-316 uvela kwintsimbi engagqwaliyo engama-316, equka i-molybdenum engama-2 ukuya kwe-3 ekhulwini njengento eyongezelelweyo eyongeza amandla ayo okumelana nokugqwala okusekwe kwi-chloride. Intsimbi engagqwaliyo engama-304 ikhusela kwiimeko zomoya kunye nokuvezwa kweekhemikhali kwinqanaba eliphantsi, ngelixa intsimbi engagqwali engama-316 ibonelela ngokhuseleko oluyimfuneko kwiindawo zaselwandle kunye nokusetyenziswa kwamanzi anetyuwa kunye ne-chloride ephezulu kwimizi-mveliso. Ixabiso lentsimbi engagqwali engama-316 lidlula elo lentsimbi engagqwali engama-304 ngama-30 ukuya kuma-40 ekhulwini.

Iziko lokucubungula iikhemikhali kwiPhondo laseShandong lifake iintloko zokupholisa zentsimbi engagqwali ezingama-304 kwinkqubo yalo yokutshintshiselana ngobushushu emanzini olwandle ngonyaka ka-2024. Iqela lokuthenga likhethe ama-304 ukuze longe malunga ne-12,000 kwiindleko zezinto eziphathekayo. Iindonga zemibhobho zafumana i-chloride pitting epheleleyo, eyenzeka ngaphantsi kweenyanga ezili-18. Iziko lajongana neendleko ezimalunga ne-12,000 kuyo yonke inkqubo yokuvala, ukutshintshwa, kunye nolawulo lwenkunkuma enobungozi. Iindonga zemibhobho zafumana i-chloride pitting epheleleyo, eyenzeka ngaphantsi kweenyanga ezili-18. Iziko lachitha malunga ne-47,000 kuyo yonke inkqubo, equka ukuvalwa, ukutshintshwa, kunye nokulahlwa kwenkunkuma enobungozi. Ukonga kweendleko okwakulindelwe kwanyamalala, ngelixa ukutshintshwa kwezinto kwajika kwaba yi-316 stainless steel, njengoko wonke umntu wayelindele.

Le mpazamo yenzeka rhoqo. Izinto ezisetyenziswayo 304 kunye no-316 zibonisa inkangeleko efanayo, ngelixa zineempawu ezifanayo zoomatshini kwaye zabelana ngomlinganiselo ofanayo wamandla okutsalwa. Izinto zokuqala zigcina ukusebenza xa zichatshazelwe kwiikloride, ngelixa izinto ezisetyenziswayo zesibini zisilela kwangethuba. Iinjineli kunye nabaphathi bokuthenga bafuna indlela ethile yokumisela ukuba zeziphi izinto ekufuneka bazikhethe.

Esi sikhokelo sibonelela ngothelekiso oluhambelanayo lwentsimbi engagqwaliyo engama-304 kunye ne-316. Umfundi uya kuqonda umahluko phakathi kwezinto ezimbini, ukulinganiswa kwazo kokumelana nokugqwala, iimpawu zoomatshini kunye neempawu zokuwelda, uvavanyo lweendleko, kunye nexesha elifanelekileyo lokusebenzisa umgangatho ngamnye wezinto. Isakhelo sesigqibo oza kusifumana kolu phononongo siya kukunika izikhokelo ezichanekileyo ezisebenzisa ulwazi lobuchwephesha kunye nezifundo zetyala ezisebenzayo ukwenza izigqibo.

IItrakthi ezibalulekileyo

• I-316 iqulethe i-2-3% ye-molybdenum, nto leyo eyinika i-PREN engama-23-28 xa ithelekiswa ne-304's 18-20
• I-316 ixabisa ngaphezulu kwama-30-40% kune-304, kodwa uhlalutyo lwe-TCO ludla ngokuthanda i-316 kwiindawo ezine-chloride.
• I-304L kunye ne-316L zinciphisa ikhabhoni ukuya kwi-0.03%, nto leyo eyenza ukuba zibe yimfuneko kwizinto ezenziwe nge-welded
• Zombini iiklasi zinomlinganiselo ofanayo wokuqina kokutsalwa (515 MPa) kwimeko efakwe i-annealed
• I-304 lukhetho olukrelekrele ngakumbi kwiindawo zangaphakathi, ezingeyiyo i-chloride apho i-316 ingenazo izibonelelo ezongezelelweyo

Ngaba ufuna uncedo lokukhetha umgangatho ofanelekileyo kwiprojekthi yakho? Iqela lethu lokukhetha izinto lingahlalutya imeko yakho yokugqwala, iimfuno zokuwelda, kunye nohlahlo-lwabiwo mali ukuze licebise umgangatho wentsimbi engagqwaliyo ofanelekileyo.

Yintoni umahluko phakathi kwe-304 kunye ne-316 Stainless Steel?

I-304 kunye ne-316 zombini ziintsimbi ezingenasici ze-austenitic kwi-300 series. Zabelana ngesakhiwo sekristale ye-cubic esijonge ubuso, ukwakheka okugqwesileyo, kunye nokudityaniswa okuhle. Umahluko obalulekileyo usekwe kulwakhiwo lwazo lweekhemikhali kunye nendlela olo lwakhiwo oluchaphazela ngayo ukumelana nokugqwala.

Ukuqhekeka kokwakheka kweekhemikhali

Ulwakhiwo lweekhemikhali lwentsimbi engagqwaliyo engama-304 luquka i-18 ukuya kuma-20 ekhulwini ye-chromium kunye ne-8 ukuya kwi-10.5 ekhulwini ye-nickel. I-Molybdenum ikhona kule nto kuba akukho nto yongeziweyo ngabom kuyo. Igama le-UNS yi-S30400, kwaye elingana neyaseYurophu yi-EN 1.4301.

Ulwakhiwo lwentsimbi engagqwaliyo engama-316 luquka i-16 ukuya kwi-18 ekhulwini ye-chromium kunye ne-10 ukuya kwi-14 ekhulwini ye-nickel, kunye ne-2 ukuya kwi-3 ekhulwini ye-molybdenum, esebenza njengento ebalulekileyo kuyo. Igama le-UNS yi-S31600, kwaye elingana neyaseYurophu yi-EN 1.4401.

I-Molybdenum isebenza njengento ephambili eguqula yonke inkqubo. I-Molybdenum iphucula ukuqina kokhuseleko lwe-chromium oxide olungasebenziyo kwiindawo ezine-chloride. Ifilimu engasebenziyo yonakala xa ii-chloride zingena ngomqobo wokukhusela. Umaleko wokukhusela ngoku ubonisa ukumelana okuphuculweyo nokuhlaselwa kwe-chloride.

Ukuze ufumane umbono obanzi wendlela amanqanaba entsimbi engagqwaliyo ahlulwe ngayo, jonga isikhokelo sethu esipheleleyo sentsimbi engagqwaliyo.

Impembelelo yeMolybdenum kwiNgxaki yokuGqwala

Inombolo elinganayo yokumelana nokugawulwa kwePitting (PREN) ilinganisa lo mahluko. Ifomula eqhelekileyo yePREN yile:

I-PREN = %Cr + 3.3(%Mo) + 16(%N)

I-304 ine-PREN emalunga ne-18-20. I-316 ine-PREN engama-23-28. Loo phuculo lwama-25-40% luthetha ngokuthe ngqo ubomi obude benkonzo emanzini olwandle, ekucutshungulweni kweekhemikhali, nakuyo nayiphi na indawo apho kukho ii-chloride.

Kuvavanyo lwe-ASTM B117 lokutshiza ityuwa, i-316 ibonisa ixesha elide lokubola ngokuphindwe kathathu ukuya kahlanu kune-304. Kuvavanyo lokuntywiliselwa emanzini, i-304 idla ngokubonisa ukubola ngaphakathi kweminyaka emi-2 ukuya kwemi-5, ngelixa i-316 ihlala iminyaka eli-10 ukuya kweli-15 okanye ngaphezulu phantsi kweemeko ezifanayo.

Uthelekiso lweMichiza ye-304 vs 316

Itheyibhile engezantsi ithelekisa ukwakheka kweekhemikhali zemigangatho esemgangathweni engama-304 kunye nama-316.

Element	304 (%)	316 (%)	Isizathu sokuba Kubalulekile
Ikhabhoni (ubuninzi)	0.08	0.08	Ichaphazela ukuwelda kunye nomngcipheko wokuziva
Chromium	18.0-20.0	16.0-18.0	Yenza umaleko onganyangekiyo wokugqwala
nickel	8.0-10.5	10.0-14.0	Iqinisa ulwakhiwo lwe-austenitic, iphucula ukuqina
Molybdenum	0	2.0-3.0	Ibaluleke kakhulu ekuchaseni imingxuma ye-chloride
IManganese	2.0 max	2.0 max	Iphucula iipropati zokusebenza ezishushu
Silicon	1.0 max	1.0 max	I-Deoxidizer ngexesha lokwenza intsimbi
Iitrogen	0.10 max	0.10 max	Yonyusa amandla kunye nokumelana nokuqhekeka kwemingxuma
intsimbi	ibhalansi	ibhalansi	Isiseko se-alloy

Amaxabiso ziindidi eziqhelekileyo ngokwe-ASTM A240 nganye kwipleyiti, ishiti, kunye nomcu. Izinto ezisetyenzisiweyo zahlukile ngokomthengisi kunye nohlobo lwemveliso.

I-chromium ephantsi kwi-316 ilungelelaniswa kukongeza i-molybdenum. Umxholo ophezulu we-nickel uphucula ukuqina kunye nokumelana nokuqhekeka koxinzelelo. Kubathengi abahlola iiMill Test Certificates, ukuqinisekisa umxholo we-molybdenum yeyona ndlela ilula yokuqinisekisa ukuba izinto ezihanjisiweyo ziyi-316 hayi i-304.

Ukumelana nokuNgxwala: 304 vs 316

Ukunyangwa koMhlwa ngokuBanzi

Zombini i-304 kunye ne-316 zibonelela ngokumelana okuhle kakhulu nokugqwala komoya, amanzi acocekileyo, kunye neekhemikhali ezininzi eziphilayo. Kwiindawo zangaphakathi, kwiindawo zasezidolophini, nakwiindawo zoshishino ezingezizo i-chloride, zombini ezi nqanaba zisebenza ngendlela efanayo. Umaleko we-chromium oxide ongasebenziyo ukhusela zombini ezi nqanaba ngokufanelekileyo xa i-chloride ingekho.

Ukumelana neChloride kunye nePitting (Umahluko obalulekileyo)

Ezi ntlobo zimbini ziqala ukubonisa umahluko wazo omkhulu kweli nqanaba. Ii-ion ze-chloride zihlasela umaleko ongasebenziyo kwaye ziqalise ukubola kwemigodi yendawo. Umngxuma ukhula ngesantya esiphezulu kuba ikhemistri yomngxuma ijika ibe yimeko ye-asidi ezigcinayo.

Izinto ze-304 zikhusela iikhompawundi ze-chloride de zifikelele kuxinzelelo lwe-200 ppm kwiimeko zobushushu obuphakathi. Umngcipheko wokuqubha uqala ukwanda emva kokufikelela kulo mda. Izinto ze-304 azifaneleki ukusetyenziswa emanzini olwandle, aqulethe malunga ne-19,000 ppm ye-chloride.

Izinto ze-316 zikhusela iikhompawundi ze-chloride de zifikelele kuxinzelelo lwe-1,000 ppm phantsi kweemeko zendalo ezifanayo. Umxholo we-molybdenum we-2-3% utshintsha amandla okufaka imingxuma abe ngamaxabiso amahle ngakumbi afuna amanqanaba aphezulu e-chloride okanye amaqondo obushushu ukuze uhlaselo luqale. Izinto ze-316 zisebenza njengomgangatho ophantsi owamkelekileyo wokuchatshazelwa yi-chloride emanzini olwandle nakwimizi-mveliso enzima.

Isityalo esilungisa ukutya saseZhejiang sifunde esi sifundo ngomgca waso wokuhlamba. Esi sakhiwo sisebenzise izixhobo ezingama-304 zokubilisa imifuno kwisisombululo setyuwa esingu-6%. Esi sityalo besifuna ukulungisa izixhobo ngenxa yomonakalo wemingxuma yexesha elithile, owenzeka rhoqo emva kweminyaka emithathu. Esi sixhobo sisebenze iminyaka esibhozo ngaphandle kokuphazamiseka okunxulumene nokugqwala ukusukela oko inkampani yatshintshela kwi-316L. Iindleko zokulungisa zidlule kwiindleko zezinto zokwakha, kodwa inkampani yonge imali ngexesha lomjikelo wayo wokuqala wokulungisa.

Ukuqhekeka kweCrevice kunye nokuqhekeka koxinzelelo

I-316 ikwaphumelela ngaphezu kwe-304 ekumelaneni nokugqwala kwemiqolo. Iikroba, iindawo zokudibanisa i-gasket, kunye neendawo ezingafakwanga imali eninzi zenza i-chemistry engashukumiyo ekhawulezisa uhlaselo. I-molybdenum kwi-316 iphucula ukuxhathisa le ndlela yokusilela yendawo.

Zombini ezi ntlobo zichaphazeleka lula kukuqhekeka kwe-chloride stress corrosion okungaphezulu kwama-60 degrees Celsius. Kwinkonzo ye-chloride enobushushu obuphezulu, kufuneka iintsimbi eziqinileyo ezimbini ezifana ne-2205 okanye ii-alloys ze-nickel eziphezulu.

Ukuxinana kobushushu obuphezulu

Iintsimbi ezingasebenziyo ezingama-304 kunye ne-316 zibonisa umda ofanayo wobushushu obusebenzayo, ezinokuwugcina emoyeni de ziqhekeke kwi-870 degrees Celsius kunye ne-425 degrees Celsius ukuze ziqhubeke nokusebenza. Ezi ntlobo zimbini zibonisa ukusebenza okulinganayo kubuchule bazo bokumelana ne-oxidation yobushushu obuphezulu. Izinto ezikhethwayo zokusebenza ngaphezulu kwe-800 degrees Celsius ziquka iintsimbi ezingasebenziyo ezingama-321 kunye ne-310S eziqulethe umxube weekhemikhali ezizinzileyo kunye nomxholo ophezulu we-chromium kunye ne-nickel.

Uthelekiso lweePropati zoomatshini

Ukuzibamba kunye nokomelela kokuVuna

Kwimeko efakwe i-annealed, i-304 kunye ne-316 zabelana ngeempawu ezifanayo zobuncinci boomatshini kwi-ASTM A240 nganye:

• Amandla okutsalwa: 515 MPa (74,700 PSI)
• Amandla okuvelisa: 205 MPa (29,700 PSI)
• Ukudibanisa: 40%

Oku kuthetha ukuba kwizicelo zesakhiwo apho amandla alawula uyilo, naluphi na uhlobo luhlangabezana nemigaqo efanayo. Ukukhetha phakathi kwazo kufuneka kulawulwe ziimfuno zokugqwala, kungekhona iimpawu zoomatshini.

Ukuqina kunye nokuDuctility

I-304 idla ngokulinganisa i-92 HRB kwimeko efakwe i-anneal. I-316 ilinganisa malunga ne-95 HRB. Umahluko awuncinci kakhulu kwiindlela ezininzi zokusebenza. Zombini ezi zigaba zibonelela ngokuguquguquka okugqwesileyo, okuvumela ukutsalwa okunzulu, ukugoba, kunye nokusebenza okuntsonkothileyo kokwenza.

Amanani okuqinisa umsebenzi

Umsebenzi we-304 uqina ngokukhawuleza kune-316 ngexesha lokwenziwa kobandayo. Oku kuthetha ukuba i-316 ayifuni ukutsalwa okuphakathi okuncinci ngexesha lokwenziwa okunzima. Kwizicelo zokuzoba nzulu, i-316 inokubonelela ngenzuzo yokucubungula nangona ixabiso layo eliphezulu lezinto zokwakha liphezulu.

Iimpawu zeMagnetic

Zombini ezi klasi azinamagnethi xa zikwimeko eyomeleleyo ngenxa yesakhiwo sazo sekristale ye-austenitic. Nangona kunjalo, zombini zinokuvelisa ukuvuleka okuncinci kwemagnethi emva kokusebenza ngokubanda kakhulu. I-316 ngokubanzi igcina ukuvuleka okuphantsi kwemagnethi emva kokusebenza ngokubanda xa kuthelekiswa ne-304. Kwizicelo apho ukuvuleka okuncinci kwemagnethi kubalulekile, i-316 inokubonelela ngenzuzo encinci.

304L vs 316L: Kutheni i-L ibalulekile

Uludwe lwe-L lubonisa izinto ezinekhabhoni ephantsi. Umxholo ophezulu wekhabhoni kwizinto ezisemgangathweni ezingama-304 kunye nama-316 uvumela i-0.08% yekhabhoni. Amanqanaba e-L athintela umxholo wekhabhoni ukuya kwi-0.03% yekhabhoni ephezulu.

Inkqubo yokuwelda idala ingxaki kuba ikhabhoni idibana nekromium ukuvelisa iikhabhoyide zekromium, eziqokelelana kwimida yeenkozo. Ukuziva ukhululekile kubangela ukuba ikromium ishiye iindawo ezikufutshane nemida yeenkozo, ezikhula ngale nkqubo. Indawo echaphazeleka bubushushu ifumana ukugqwala phakathi kweegranular ngenxa yale meko.

Ishishini lokuwelda likhetha i-304L kunye ne-316L kwimveliso yalo yokuwelda. Inkqubo yokuwelda ivelisa izinto eziphantsi zekhabhoni, ezithintela ukuna kwe-carbide kwaye zikhusela ukumelana nokugqwala kwimeko yokuwelda. Amanqanaba e-L akhusela ukugqwala kwiindawo ezixineneyo ngaphandle kokufuna isisombululo se-post-weld annealing.

Amanqaku aqhelekileyo kunye namanqaku e-L abonisa umahluko wamaxabiso ophakathi kwe-3 ukuya kwi-5 ekhulwini. Iprimiyamu encinci efunekayo kwiizicelo ezininzi ezidityanisiweyo ikhusela kwiingozi zokuziva ezikhoyo kwezi zenzo.

Umahluko phakathi kokuWelding kunye nokuFaka

Ukukhetha iMetal yeFiller

Inkqubo yokuwelda ye-304 ifuna i-ER308 okanye i-ER308L njengentsimbi yokuzalisa efanelekileyo. Inkqubo yokuwelda ye-316 ifuna i-ER316 okanye i-ER316L njengentsimbi yokuzalisa efanelekileyo. Intsimbi yokuzalisa efunekayo kufuneka ilingane okanye idlule umxholo we-alloy yesinyithi esisisiseko kuba le mfuneko iqinisekisa ukuba i-weld iya kugcina iimpawu zayo zokumelana nokugqwala.

Inkqubo yokuwelda ukusuka ku-304 ukuya ku-316 inokwenzeka. Isinyithi esizalisa esisetyenzisiweyo kule projekthi kufuneka sibe yi-ER316L. I-weld iya kubonisa ukumelana nokugqwala okungu-316; nangona kunjalo, i-304 iya kuyithintela ukusebenza kwamalungu ngenxa yokwakheka kwawo okuthile. Umyili wenkqubo kufuneka amkele ukuba i-304 ithintela ukhuseleko lokugqwala olupheleleyo lwamalungu adibeneyo.

Iindawo ezichaphazeleka bubushushu kunye nobushushu

Umgangatho 304 kunye no-316 unokubonakalisa iimvakalelo kwindawo echaphazelekileyo bubushushu ukuba ubushushu bugqithisile okanye ukuba izinto zigcinwe kuluhlu lobushushu bokubonakalisa iimvakalelo (450-850 degrees Celsius) ixesha elide. Yingakho ii-L grades zikhethwa kakhulu kwiindawo zokuwelda ezinama-multi-pass okanye iindawo ezixineneyo.

Unyango lwasemva kweWeld

Kwimigangatho eqhelekileyo kwizicelo ezibalulekileyo, i-annealing yesisombululo se-post-weld kwi-1,050-1,100 degrees Celsius elandelwa kukupholisa ngokukhawuleza inyibilikisa i-chromium carbides kwaye ibuyisele ukumelana nokugqwala. Kwimigangatho ye-L, olu nyango ludla ngokungabalulekanga.

Ukuqhotsa kunye nokuqhotsa kufuneka kulandele ukuqhotsa kuzo zombini iiklasi. Ukuqhotsa kususa isikali se-weld kunye neengqimba eziphelelwe yi-chromium. Ukuqhotsa kwi-nitric acid kubuyisela ifilimu ye-passive oxide.

Ukubunjwa kunye nokuSebenza

Zombini iintlobo zomatshini ziyafana kwaye zithathwa njenge-gummy. Zivelisa iitships ezinde kwaye zisebenza ngokuqina ngokukhawuleza kwincam yesixhobo. Izixhobo ezineencam zekhabhayithi, ii-angles ze-rake ezilungileyo, kunye ne-coolant eyaneleyo zibalulekile. Iimashini ezingama-316 zilula kancinci kune-304 ngenxa yesantya sazo esiphantsi sokuqina komsebenzi.

Uthelekiso lweendleko: 304 vs 316

Umahluko kwixabiso lezinto eziluhlaza

Intsimbi engagqwaliyo engu-316 ixabisa ngaphezulu kwama-30-40% kwizinto eziluhlaza. I-premium iqhutywa ngumxholo we-molybdenum kunye ne-nickel. I-Molybdenum yinto ethengiswa ngexabiso lempahla, kwaye ixabiso layo lemarike lichaphazela ngokuthe ngqo iindleko ezingama-316.

Imida yokubonelela ngeMolybdenum ngo-2025-2026 isenokunyusa iprimiyamu engama-316 iye kwi-40-50% kwezinye iimarike. Amaqela okuthenga kufuneka aqinisekise amaxabiso angoku endaweni yokuxhomekeka kwiimilinganiselo zeendleko zangaphambili.

Uhlalutyo lweendleko zoBunini zizonke

Ixabiso lezinto ezisetyenzisiweyo kwangaphambili liyinxalenye nje ye-equation. Xa i-304 ichazwe kwindawo ye-316, ixabiso lomjikelo wobomi lidla ngokudlula imali egciniweyo yokuqala ngomda obanzi.

Cinga ngomzekelo wesityalo seekhemikhali saseShandong. Izaphulelo $ezili-$ 316 kwasekuqaleni.

Isakhelo esilula se-TCO sokukhetha amanqaku:

• Umahluko wexabiso lezinto ezibonakalayo kwangaphambili: 316 ixabisa ngaphezulu nge-30-40%
• Ubomi benkonzo obulindelekileyo kwiikloridi: 304 = iminyaka emi-2-5, 316 = iminyaka eli-10-15 nangaphezulu
• Iindleko zokutshintsha: Izinto + umsebenzi + ixesha lokuphumla + ukulahla
• Iindleko zolondolozo: Ukuhlolwa, ukulungiswa, ukugqunywa

Xa iikloride zidlula i-200 ppm, i-316 idla ngokuphumelela kwi-TCO kumjikelo wokuqala wokutshintshwa.

Xa i-316 ichazwe ngokugqithisileyo

Ayizizo zonke izicelo ezifuna i-316. Izinto ze-304 zisebenza ngeendleko eziphantsi ze-30-40% ngelixa zibonelela ngokusebenza okufanayo kwi-316 kwiindawo ezingaphakathi zomoya, iinkqubo zamanzi acocekileyo kunye nenkonzo yeekhemikhali ezingezizo i-chloride.

Inkampani yokwakha iHebei ikhethe i-316 kwiprojekthi ye-facade yasezidolophini, icinga ukuba ilebheli yomgangatho wolwandle yayithetha ukusebenza ngcono. Okusingqongileyo kwakungekho chloride. Emva kweminyaka engama-20, zombini ii-facade ezingama-304 kunye nezingama-316 kwisithili esinye zabonisa ukusebenza okufanayo kokugqwala. Inkcazo ye-316 yongeze malunga ne-35% kwibhajethi yezinto ezibonakalayo ngaphandle kwenzuzo.

Izinto ze-304 zibonelela ngokhetho olungcono lwezemali kwiindawo ezingenayo imiphumo yokonakala. Isitshixo kukuqonda iimeko zakho zokusebenza zokwenyani endaweni yokungasebenzisi izixhobo zezinga eliphezulu.

Ngaba ukulungele ukuthelekisa amaxabiso esicelo sakho? Jonga iimveliso zethu zentsimbi engagqwali ezingama-304 kunye neemveliso zentsimbi engagqwali ezingama-316 ukuze ufumane ukufumaneka kwangoku kunye namaxabiso akhuphisanayo efektri.

Izicelo: Ixesha lokusebenzisa i-304 vs 316

Khetha u-304 Nini

• Indalo ikwindawo enomoya, yangaphakathi, okanye emanzini acocekileyo
• Ukuvezwa kwe-chloride kungaphantsi kwe-200 ppm kwaye amaqondo obushushu aphakathi
• Ukulungiswa kokutya kubandakanya i-pH 5-9 ngaphandle kwetyuwa okanye ityuwa
• Le projekthi inqongophele ngokwebhajethi kwaye umngcipheko wokugqwala uphantsi
• I-HVAC, indawo yokugcina impahla, izixhobo zoshishino ngokubanzi, kunye nezicelo zokuhombisa
• Ukuwelda kuncinci okanye unyango lobushushu emva kokuwelda lunokwenzeka

Khetha u-316 Nini

• Kukho ukuvezwa kwamanzi aselwandle, elunxwemeni, emanzini anetyuwa, okanye kwi-spray yetyuwa
• Ukucubungula iikhemikhali kubandakanya iikloride, i-bleach, okanye ulwelo olungaziwayo
• Izixhobo zonyango, amayeza, kunye nezixhobo zotyando zifuna ukuhambelana nokubulala iintsholongwane
• Iindawo zokutya ezine-chloride ephezulu ezifana nokuhlamba ngamanzi abandayo, ukongeza ityuwa, okanye ukucubungula ukutya kwaselwandle
• Iifektri zepulp nephepha, ukunyibilikisa amalaphu, kunye nokucubungula iifoto
• Ukuwelda okuqhubekayo kuyadingeka kwaye ukuwelda emva kokuwelda akusebenzi (sebenzisa i-316L)

Itheyibhile yokuthelekisa isicelo

Isicelo / Ishishini	IBanga elicetyiswayo	Ukuqiqa
Izixhobo zangaphakathi ngokubanzi	304	Akukho chloride evezwayo, ixabiso layo liphuculwe
Izixhobo zaselwandle kunye nezixhobo zesikhephe	316 / 316L	Kubalulekile ukumelana nekloridi
Iitanki zamanzi acocekileyo kunye nemibhobho	304	Ukumelana nokugqwala okwaneleyo
Iinkqubo zokupholisa amanzi olwandle	316 / 316L	I-chloride ephezulu, umngcipheko wokuqhekeka kwemingxuma
Ukulungiswa kokutya (okungenatyuwa)	304 / 304L	Iyahambelana ne-FDA, ixabisa kakuhle
Ukuhlamba kunye nokubilisa	316L	Uxinzelelo oluphezulu lwetyuwa
Ukugcinwa kweekhemikhali (ezithambileyo)	304	Ukumelana neekhemikhali ngokubanzi
Ukucubungula iikhemikhali (ii-chloride)	316L	Ukumelana ne-chloride kunye ne-asidi
Izixhobo zamachiza	316L	Ukuhambelana kokuvala inzala
Izixhobo zotyando	316L	I-Biocompatibility kunye nokumelana nokubola
Iifacade zezakhiwo zasezidolophini	304	Ukugqwala komoya kuphela
Iifacade zezakhiwo zaselunxwemeni	316	Ukuba sesichengeni sesitshizi setyuwa

Ngokuphathelele izicelo zeshishini lokutya ngokukodwa, jonga isikhokelo sethu esineenkcukacha ngemigangatho neemfuno zentsimbi engagqwaliyo yomgangatho wokutya .

Indlela Yokuchonga i-304 vs 316 Entsimini

Ukuchonga amanqaku ngokuchanekileyo kuthintela ukusetyenziswa gwenxa okubizayo. Kukho iindlela ezahlukeneyo, ukusuka kuvavanyo olulula ukuya kuhlalutyo lwelebhu.

Uvavanyo lweMabala eKhemikhali (Uvavanyo lweMoly)

Uvavanyo lwebala le-molybdenum lubona i-molybdenum ngokusebenzisa i-oxalic acid kunye ne-potassium ferricyanide. Utshintsho lombala lubonisa ubukho be-molybdenum, eqinisekisa i-316 stainless steel endaweni ye-304 stainless steel. Inkqubo yovavanyo ifuna amanyathelo okhuseleko lweekhemikhali, nangona amanyathelo ayo ehlala elula. Uvavanyo alunakwahlula i-316 stainless steel kwezinye ii-alloys ezine-molybdenum eziquka i-317 kunye ne-2205 stainless steel.

XRF Uhlalutyo

Ii-X-ray fluorescence analyzers eziphathwa ngesandla zibonelela ngohlalutyo olukhawulezayo nolungatshabalalisiyo lwekhemikhali. I-XRF inokumisela umgangatho wezinto ezibonakalayo ngokuchonga okuqinisekisa ukuba izinto ezizisiweyo ziyahambelana na nemiyalelo yokuthenga. Amasebe amaninzi omgangatho ngoku asebenzisa i-XRF njengendlela eqhelekileyo yokuhlola izinto ezingenayo.

Mill Test Certificates

Bonke abathengisi abathembekileyo banikezela ngeSatifikethi soVavanyo lweMill esineekhemikhali kunye neempawu zoomatshini. Isatifikethi kufuneka sibonise ukuba umxholo we-molybdenum uhlangabezana neemfuno ezingama-316, ezifuna i-2-3% ye-molybdenum ngokwemigangatho ye-ASTM EN kunye ne-JIS. Zonke iimpahla ezithunyelwayo zentsimbi engagqwaliyo engama-304 kunye nentsimbi engagqwaliyo engama-316 evela kwi-LIANYUNGANG DAPU METAL ziquka amaxwebhu apheleleyo e-MTC aqulethe iinkcukacha zekhemikhali.

Iingozi Eziqhelekileyo Zokuchongwa Okungafanelekanga

Abanye abathengisi batshintsha i-201 nge-304 ukunciphisa iindleko. I-201 ine-nickel encinci kunye ne-manganese eninzi eyenza ukuba ingamelani nokugqwala. Umngcipheko oqhelekileyo kwiimeko ze-304 vs 316 kwenzeka xa abathengi befumana i-304 endaweni ye-316 ngexesha lamaxabiso aphezulu emarike ye-molybdenum. Nanini na xa usebenza nabathengisi abatsha, kufuneka uqinisekise ulwazi lwenqanaba ngovavanyo lwe-MTC okanye lwe-XRF.

Imibuzo ebuzwa qho

Nguwuphi umahluko omkhulu phakathi kwe-304 kunye ne-316 yensimbi engenasici?

Umahluko ophambili phakathi kwentsimbi engagqwaliyo ye-304 kunye ne-316 ukho kuba i-316 ine-2-3% ye-molybdenum edala lo mahluko. Olu longezo luphucula kakhulu ukumelana ne-chloride pitting kunye ne-crevice corrosion. Ezi ntlobo zimbini zezosapho lwe-austenitic ngelixa zigcina amandla okuxinana afanayo kwaye zibonelela ngokwakheka okugqwesileyo kunye nokudityaniswa. Ezi zinto zimbini zivelisa iziphumo zokusebenza ezifanayo kuzo zonke iindawo ngaphandle kwezo ziqulethe i-chloride.

Yintoni eyenza intsimbi engagqwaliyo engama-316 ibe nexabiso elingcono kunexabiso layo eliphezulu?

Ixabiso eliphezulu le-316 liba yinto efanelekileyo kwiindawo ezine-chloride, ezifana nokulungiswa kwe-marine kunye neekhemikhali kunye nokusetyenziswa kokutya okunetyuwa eninzi. Le mveliso idala ukonga kuba iindleko zayo zokuqala zibuyiselwa ngexesha elide lokusebenza kunye nokususwa kweemfuno zokutshintshwa kwezixhobo. Ixabiso elongezelelweyo le-316 liba yinto engafunekiyo kuba izinto aziboneleli nzuzo kwiindawo ezingezizo i-chloride xa kuthelekiswa nentsimbi engagqwaliyo ye-304.

Ngaba i-304 stainless steel isebenza kakuhle xa isetyenziswa ngaphandle?

Intsimbi engagqwaliyo ye-304 ibonisa ukusebenza okufanelekileyo kwiindawo ezininzi zangaphandle ezihlangabezana neemeko eziqhelekileyo zomoya. Le nto ikhusela emvuleni, ekufumeni nasekungcoleni kwezixeko ngokumelana kwayo okusebenzayo. Le nto i-316 iba yimfuneko kwimimandla eselunxwemeni ekhoyo kwiikhilomitha ezi-5 ukuya kwezili-10 zamanzi anetyuwa ngenxa yokuvezwa yityuwa. Ukusetyenziswa kwezinto ezi-316 kuba yimfuneko kwiindawo zoshishino eziqulathe amanqanaba aphezulu e-chloride kwiimeko zazo zomoya.

Ngaba i-304 okanye i-316 ingcono xa kuthelekiswa nezinga lokutya?

Ezi klasi zimbini, i-304 kunye ne-316, zombini zifanelekile njengezixhobo zodidi lokutya. Ishishini lokucubungula ukutya lisebenzisa kakhulu i-304 stainless steel kuba iyahlangabezana nemigangatho ye-FDA kwaye ikhusela ekungcoleni xa iphatha iimveliso zokutya ezingenatyuwa. I-316 stainless steel isebenza ngcono kunezinye izixhobo kwiindawo eziqulathe amanqanaba aphezulu etyuwa kunye nemisebenzi ebandakanya ukuhlamba ngamanzi kunye neenkqubo ezifuna ukubulala iintsholongwane okusekelwe kwi-chlorine. Iphepha lemigangatho yentsimbi engatyiwayo yodidi lokutya libonelela ngolwazi olupheleleyo malunga nezixhobo zodidi lokutya.

Ithetha ukuthini i-L kwi-304L nakwi-316L?

Unobumba u-L umele umxholo wekhabhoni ephantsi ngaphakathi kwe-alloy. Umxholo wekhabhoni we-304L kunye ne-316L alloys ufikelela kumda ophezulu we-0.03%, ngelixa amanqaku aqhelekileyo evumela umxholo wekhabhoni ophezulu ukuya kuthi ga kwi-0.08%. Inkqubo yokudibanisa inciphisa imvula ye-chromium carbide kuba kukho umxholo wekhabhoni omncinci, nto leyo ephelisa ukugqwala kwe-intergranular ngaphakathi kwendawo echaphazelekileyo bubushushu. Amanqaku e-L kufuneka asetyenziswe kuzo zonke izinto ezidityanisiweyo.

Ngaba ungayishida intsimbi engagqwaliyo engama-304 ukuya kuma-316?

Ewe. Ijoyinti ifuna isinyithi esizalisa i-ER316L njengesixhobo esifanelekileyo sokuwelda. Isinyithi esizalisa ijoyinti siya kuba nokumelana nokugqwala kwamanqanaba angama-316, kodwa icala lesinyithi elisisiseko elingama-304 liya kuncitshiswa ekusebenzeni kwamanqanaba angama-304. Uyilo lwamalungu adibeneyo okusetyenziswa ngokugqwala lufuna ukukhuselwa kwecala elingama-304 kwiimeko ezimandundu zokusingqongileyo.

Ngaba umazibuthe uya kunamathela kwintsimbi engama-316?

Imagnetism ayifumaneki kwizinto emva kokuba zifakwe emanzini. Zombini i-304 kunye ne-316 ziyi-austenitic kwaye azinamagnethi. Inkqubo yokusebenza ebandayo iphumela ekwakhiweni kwenani elincinci le-martensite elibangela utshintsho oluncinci lwe-magnetic permeability. I-316 stainless steel igcina i-magnetic permeability ephantsi emva kokusebenza ebandayo kune-304 stainless steel. Ubukho bemagnetism enamandla bubonisa ukuba izinto ziyinxalenye yodidi lwe-ferritic oluquka i-430 endaweni yodidi lwe-austenitic.

Uyibona njani i-304 kwi-316 stainless steel?

Uhlalutyo lwe-XRF oluphathwa ngesandla luhlala luyindlela ethembekileyo kuba lutyhila ngoko nangoko ukwakheka kweekhemikhali zezinto. Uvavanyo lwebala le-molybdenum yindlela elula yasentsimini. Isatifikethi sovavanyo lweMill sisebenza njengendlela eqhelekileyo yokujonga ulawulo lomgangatho. Amanqanaba amabini ezinto ezibonakalayo abonakala efana nto leyo eyenza ukuhlolwa okubonakalayo kungabi kwanele ukuchongwa.

Ixabisa kangakanani i-316 kune-304?

Ixabiso lezinto eziluhlaza ze-316 lidlula i-304 nge-30 ukuya kwi-40 ekhulwini. Iprimiyamu ibonisa umxholo we-molybdenum kunye ne-nickel. Umsantsa wamaxabiso phakathi kweemveliso usukela kwi-40 ukuya kwi-50 ekhulwini ngamaxesha eendleko eziphezulu ze-molybdenum. Soloko uqinisekisa amaxabiso angoku ukuze ufumane uhlahlo lwabiwo-mali oluchanekileyo lweprojekthi.

Ndingayisebenzisa i-304 kwindawo yolwandle?

Izinto ezisetyenzisiweyo ezingama-304 azifanelekanga xa zisetyenziswa elwandle, apho zisasazwa khona ityuwa rhoqo kwaye zintywiliselwa phantsi kwamanzi. Uxinzelelo lwe-chloride emanzini olwandle, olufikelela kwi-19000 ppm, ludlula umda wokumelana nezinto ezingama-304. Umgangatho ophantsi ofunekayo xa kusenziwa izinto zaselwandle yi-316. Izixhobo zaselwandle ezifuna ukusebenza okubalulekileyo okanye ixesha elide lobomi zifuna i-316L okanye i-duplex grades ezifana ne-2205.

isiphelo

Isigqibo phakathi kwentsimbi engagqwaliyo engama-304 kunye ne-316 sixhomekeke kumbuzo omnye ophambili, ophanda ukuba ingaba le nto iya kujongana na nokuvezwa yi-chloride.

Impendulo ikhokelela kwi-304 njengokhetho oluchanekileyo kuba inika iimpawu ezifanayo zoomatshini kunye nokumelana okufanayo nokugqwala komoya, kwaye imveliso ixabisa ngaphantsi ngama-30 ukuya kuma-40 ekhulwini kunenye indlela. Inkcazo ye-316 yeemeko ezingezizo i-chloride ibangela inkcitho yebhajethi kuba ayiphuculi ukusebenza.

Umxholo we-2-3% we-molybdenum kwi-316 stainless steel unika ukhuseleko olubalulekileyo lwe-chloride, olungenalo i-304 stainless steel. Le 316 stainless steel stainless steel igcina ukusebenza okungcono kwenkonzo kwaye inciphisa iindleko zobomi ngenxa yotyalo-mali lwayo lokuqala ekucutshungulweni kweekhemikhali emanzini olwandle nakwiindawo zokuvelisa ukutya ezinetyuwa eninzi.

Inkcazelo yezinto ezingama-304L okanye ezingama-316L zezinto ezenziwe nge-welded ikhusela ekunokwenzeka kokuba zibonakale zingenabungozi. Sebenzisa izinto zokugcwalisa ze-ER316L kwiindawo ezidityanisiweyo ngelixa uyila ukumelana nokugqwala okuncinci, okunazo icala le-304.

Isitshixo sempumelelo sifuna ukufanisa umgangatho neemeko zokusebenza zokwenyani. Inkqubo yokuchaza ngokugqithisileyo izinto ibangela iindleko ezingafunekiyo. Ukuziqhelanisa nezinto ezingachazwanga kakuhle kubangela ukuba izixhobo ziqhekeke kwangethuba, nto leyo efuna ukutshintshwa okubiza kakhulu. Isikhokelo sinika amaxabiso e-PREN kunye nemida ye-chloride kunye nesakhelo se-TCO ukukunceda ekukhetheni ukhetho olufanelekileyo.

Iqela lezobugcisa libonelela ngoncedo oluhambelana neprojekthi ukukunceda ukhethe amanqanaba kunye nezixhobo ezifanelekileyo zentsimbi engagqwaliyo. Iqela lezobugcisa libonelela ngeekowuteshini ezineenkcukacha kunye neeSatifikethi zoVavanyo lweMill, kunye neenkonzo zokucubungula ngokwezifiso ukujongana neemfuno zeprojekthi.