TL;DR:Abathengi abafumana uncedo kushishino lwezolwandle kunye neekhemikhaliikhoyili yentsimbi engatyiwayoUjongene nesigqibo esiphindaphindayo: hlawula iprimiyamu engama-30–40% kwi-316L okanye uhlale ne-304. Le ngxelo ithelekisa zombini ezi klasi kusetyenziswa i-neutral salt spray (ASTM B117) kunye nedatha yovavanyo lwe-cyclic corrosion test evela kwilebhu yethu eNingbo Stainless Steel, kunye nedatha ye-field corrosion evela kwiindawo zokufakela izityalo zaselunxwemeni nakwiikhemikhali. Isakhelo sesigqibo sigxile kwizinto ezintathu eziguquguqukayo: uxinzelelo lwe-chloride, ubushushu bokusebenza, kunye nobomi benkonzo obufunekayo.
Kutheni isigqibo se-304 vs 316L singenakwenziwa ngexabiso lodwa
Kwindima yam njengoMlawuli wezoBugcisa eNingbo Stainless Steel, ndihlaziya iinkcukacha zezinto ezisetyenzisiweyo zamakhulu eenkampani.ikhoyili yentsimbi engagqwaliyo eqengqelekayo ebandayoIiodolo minyaka le. Umbuzo we-304 xa uthelekiswa ne-316L yeyona ngxoxo ixhaphakileyo yobuchwephesha endiba nayo nabathengi. Umphathi wokuthenga kumenzi wezixhobo zaselwandle wakha wandixelela wathi, “Besisebenzisa i-304 iminyaka elishumi elinesihlanu. Isebenza kakuhle — andiboni ukuba kutheni kufuneka sihlawule imali eyongezelelweyo nge-316L.” Emva kweenyanga ezintandathu, inkampani yakhe kwafuneka itshintshe iqela lezinto ezenziwe nge-coil ezingama-304 kwiprojekthi yokususa ityuwa elunxwemeni kuba ukugqwala kwemigodi kwakudale imingxunya enzulu eyi-0.3 mm emva kweminyaka engaphantsi kwemibini yokusebenza. Ukutshintshwa kwe-316L kubize ama-40% ngaphezulu kwangaphambili kodwa akubonisi mingxunya kwiminyaka emithathu yokusebenza.
Isigqibo phakathi kwe-304 kunye ne-316L ye-coil yentsimbi engagqwaliyo asikho malunga nokuba loluphi uhlobo "olungcono." Simalunga nokufanisa iprofayili yokumelana nokugqwala kwezinto kunye nendawo yenkonzo - kunye nokuqonda ukuba ufuna ukufakwa kuhlale ixesha elingakanani ngaphambi kokuba kufuneke ukutshintshwa okunxulumene nokugqwala. Olu thelekiso lubonelela ngamanqaku edatha owadingayo ukuze wenze eso sigqibo uvulekile amehlo.
Ukwakhiwa kweekhemikhali: Umahluko weMolybdenum
Umahluko ophambili phakathi kwe-304 kunye ne-316L kukongezwa ngabom kwe-2.0–3.0% molybdenum kwi-316L. I-Molybdenum yinto eqinisa i-ferrite ephucula kakhulu ukumelana nokugqwala kwendawo ethile - ngakumbi ukugqwala kwemigodi kunye nokuqhekeka kwiindawo ezine-chloride.
| I-elementi | 304 (UNS S30400) | I-316L (UNS S31603) | Indlela Echaphazela Ngayo Ukusebenza |
|---|---|---|---|
| I-Chromium (Cr) | 18.0–20.0% | 16.0–18.0% | Ukwenziwa kwefilimu engasebenziyo — zombini iiklasi zanele |
| I-Nickel (Ni) | 8.0–10.5% | 10.0–14.0% | Ukuzinza kwe-Austenite, ukwakheka kwayo |
| I-Molybdenum (Mo) | — | 2.0–3.0% | Into ebalulekileyo — ukumelana nomngxuma |
| Ikhabhoni (C, ubuninzi) | 0.08% | 0.030% | Ikhabhoni ephantsi kwi-316L inciphisa uvakalelo ngexesha lokuwelda |
| I-PREN (Ukumelana nePitting Equivalent) | ~19 | ~24–26 | I-PREN = %Cr + 3.3×%Mo + 16×%N; phezulu = ngcono |
Ixabiso le-PREN liyi-single-number differentiate. I-PREN ye-19 ithetha ukuba i-304 ifanelekile kwiindawo ezine-chloride concentrations ukuya kuthi ga kwi-200 ppm kumaqondo obushushu angqongileyo. I-316L ene-PREN ye-24–26 yolula loo mda ukuya kuthi ga kwi-1,000 ppm chlorides. Eli nani limisela apho uhlobo ngalunye lungasetyenziswa khona ngaphandle kokugqwala okukhawulezileyo kwendawo.
Uvavanyo lweSpray yeTyuwa engathathi cala (ASTM B117) — Uthelekiso lweLebhu
Ilebhu yethu yenze uvavanyo lokutshiza ityuwa engathathi cala iiyure ezili-1,000 ngokwe-ASTM B117 kwiisampulu ze-coil eziqengqelekayo ezingama-304 kunye ne-316L (ukugqitywa kwe-2B, ubukhulu obuyi-1.0 mm). Iiparameter zovavanyo: isisombululo se-NaCl esingu-5%, ubushushu begumbi obungama-35°C, ukutshiza okuqhubekayo. Iziphumo zivavanywe kwisithuba seeyure ezili-100.
| Ixesha lokungakhuseleki | 304 — Ukujonga Ukugqwala | 316L — Ukujonga Ukugqwala |
|---|---|---|
| Iiyure ezili-100 | Umbala omncinci womphezulu emaphethelweni | Akukho tshintsho lubonakalayo |
| iiyure ezingama-300 | Ummandla womphezulu oyi-5–8% onamabala okugqwala acacileyo | Akukho tshintsho lubonakalayo |
| iiyure ezingama-500 | Umhlaba ongaphezulu we-15–20% ugqwalile, umbala obonakalayo | Ukupenda ngomkhondo kwimiphetho esikiweyo kuphela |
| iiyure ezingama-750 | Ukugqwala komphezulu okungaphezulu kwama-40%, eminye imingxuma iyakheka | Ibonakala kuphela emaphethelweni, indawo engaphantsi kwe-1% |
| iiyure ezili-1,000 | >60% umhlwa womphezulu, ubunzulu bomngxuma obuyi-0.05–0.15 mm | Umbala womphetho, akukho mingxunya kwiindawo ezithe tyaba |
Kwindawo elawulwayo yokutshiza ityuwa, i-304 ibonakalise ukuqala kokubola okufanayo emva kweeyure ezingama-300 kunye nokugruzuka okulinganiselweyo emva kweeyure ezingama-750. I-316L yasinda iiyure ezili-1,000 kuphela ngombala osemacaleni - akukho mingxunya kumphezulu othe tyaba. "Ixesha lokuqalisa ukugruzuka" le-304 yayimalunga neeyure ezingama-300 xa kuthelekiswa neeyure ezingaphezu kwe-1,000 ze-316L - uphuculo olungaphezulu kwe-3×.
Kubalulekile ukuqaphela ukuba i-ASTM B117 salt spray luvavanyo lokuthelekisa, ayilovavanyo olubonisa ubomi benkonzo. Iimeko ezikhawulezileyo zivelisa iziphumo ezihambelanayo - kodwa aziguquleli ngokuthe ngqo - ukusebenza kwentsimi. Nangona kunjalo, umahluko phakathi kwala manqanaba mabini uthembekile kwicala.
Uvavanyo lokuGqobhoka kweBhayisikile — Ukulinganisa iNdawo eziNxweme kunye nezeShishini
Ukuze sikwazi ukumela ngcono ukuvezwa kwehlabathi lokwenyani, senze uvavanyo lokugqwala olujikelezayo (i-ASTM G85-A5 eguquliweyo, umjikelo weeyure ezingama-24: iiyure ezi-2 zokutshiza ityuwa + iiyure ezingama-22 ze-95% RH kuma-35°C) ngaphezulu kwemijikelo engama-500 kuzo zombini iiklasi ezinemeko yokusila elinganisa iindawo ezicutshungulwe nge-coil. Iziphumo zisebenza ngokuthe ngqo kwiindawo zezityalo zaselwandle nezekhemikhali:
- Ikhoyili engama-304:Ukuqukuqela kwaqaliswa kwimijikelo eli-120, kugxilwe kwimiphetho echetyiweyo. Izinga lokukhula kwemigodi liphakathi kwe-0.008 mm ngomjikelo phakathi kwemijikelo eli-120–300, licotha ukuya kwi-0.003 mm ngomjikelo emva kwemijikelo engama-300 (kuncitshiswe yi-anodic polarization). Emva kwemijikelo engama-500, ubunzulu obukhulu bemigodi babuyi-0.28 mm, kunye nemijikelo eli-15–20 kwi-100 cm² idlula ubunzulu obuyi-0.1 mm.
- Ikhoyili ye-316L:Ukuqala komngxuma okokuqala kwimijikelo engama-380 — nakwimiphetho echetyiweyo kodwa kungekhona kumphezulu wekhoyili ethe tyaba. Izinga lokukhula komngxuma liphakathi kwe-0.002 mm ngomjikelo ngamnye. Emva kwemijikelo engama-500, ubunzulu bomngxuma obukhulu babuyi-0.06 mm, kunye nemingxunya engaphantsi kwe-3 kwi-100 cm² idlula ubunzulu be-0.05 mm.
Idatha yovavanyo olujikelezayo iqinisekisa ukuba umahluko obalulekileyo phakathi kwe-304 kunye ne-316L ukwixesha lokuqalisa i-pitting. I-316L ilibazisa ukuqala kwe-pitting nge-factor emalunga ne-3× xa kuthelekiswa ne-304. Kwindawo yokufakelwa elwandle ekulindeleke ukuba ihlale iminyaka eli-10, i-304 iya kuqala ukubonisa ukugqwala kwimiphetho esikiweyo kwiminyaka emi-2-3, ngelixa i-316L iya kuhlala ingachaphazeleki kangangeminyaka esi-8-10 ngaphambi kokuba i-pitting encinci yomphetho ibonakale.
Ezi ziphumo zihambelana nezifundo ezipapashwe kwintsimi malunga nokugqwala kwentsimbi engagqwaliyo kwiindawo zoshishino-zaselwandle. Uphando oluzimeleyo oluthelekisa i-304 kunye ne-316L ezivezwe kwiimeko ezixutyiweyo zoshishino-zaselwandle-zasezidolophini luqinisekisa ukuba i-316L ibonisaukumelana nemingxunya okungcono kakhulu kwiindawo ze-chloride ngenxa yomxholo wayo we-molybdenumKubathengi abangakwaziyo ukuqhuba uvavanyo lwabo lokugqwala olujikelezayo, olu thelekiso lupapashwe kwishishini lesinyithi lubonelela ngesiseko esithembekileyo sesalathiso.
Ukongeza, isiphumo somphetho osikiweyo esibonwe kuvavanyo lwethu — apho ukugalela kuqala ikakhulu kwimiphetho egayiweyo okanye echetyiweyo — sineempembelelo ezibalulekileyo ezisebenzayo kubathengi bekhoyili. Ikhoyili etyunyuzwe ububanzi kwindawo yomthengisi idala imiphetho emitsha echetyiweyo kumacala omabini estrip nganye. Ezi miphetho azinayo ifilimu ekhuselayo ye-chromium oxide passive ekhoyo kumphezulu ojikeleziweyo wekhoyili kwaye ke ngoko imele indawo ebuthathaka kwikhonkco lokubola. Xa ndichaza ikhoyili yezicelo zaselwandle okanye zeekhemikhali, ndicebisa ukuba ndicele imeko yokugaya (apho kunokwenzeka) okanye ndichaze unyango lokudlulisa umphetho — i-nitric acid okanye i-citric acid passivation ngokwe-ASTM A967 — njengenyathelo emva kokucheba.
Ubungakanani bokuphosa i-pitting — Umlinganiselo we-Electrochemical
Ilebhu yethu yenze ii-potentiodynamic polarization scans (ASTM G61) kuzo zombini ii-grades kwisisombululo se-NaCl esiyi-3.5% (ubungangamsha bamanzi olwandle) kwi-25°C kunye ne-50°C. I-pitting potential (i-Epit) yi-voltage apho ifilimu engasebenziyo iphuka khona kwaye ukukhula kwe-pit okuzinzileyo kuqala - amaxabiso aphezulu abonisa ukumelana okungcono.
| Ipharamitha | 304 kwi-3.5% ye-NaCl | I-316L kwi-3.5% ye-NaCl |
|---|---|---|
| Phuma kwi-25°C | +0.28 V (xa kuthelekiswa ne-SCE) | +0.45 V (xa kuthelekiswa ne-SCE) |
| Phuma kwi-50°C | +0.12 V (xa kuthelekiswa ne-SCE) | +0.33 V (xa kuthelekiswa ne-SCE) |
| Ubushushu obubalulekileyo bokufaka imingxuma (CPT) | ~35°C | ~55°C |
| Uxinano lwangoku olungasebenziyo | 0.8 µA/cm² | 0.4 µA/cm² |
Ubushushu obubalulekileyo bokufaka imingxuma (CPT) bungumlinganiselo osebenzayo: ngaphantsi kobu bushushu, ifilimu engasebenziyo ihlala izinzile nokuba ikwimeko ye-chloride. Ngaphezulu kwayo, ukufaka imingxuma kuqala ngokuzenzekelayo. I-304 ine-CPT emalunga nama-35°C emanzini olwandle - oko kuthetha ukuba isengozini kuyo nayiphi na indlela yokusetyenziswa kolwandle apho umphezulu wezinto udlula ama-35°C (ukukhanya kwelanga okuthe ngqo kolwandle kwiindawo ezincinci zekhoyili, umzekelo). I-316L ene-CPT engama-55°C igubungela phantse zonke iindlela zokusetyenziswa kolwandle ezikwiqondo lobushushu eliphakathi ngaphandle komngcipheko wokufaka imingxuma.
Iipropati zoomatshini — Amandla okuThamba kunye nokuLungeka
Zombini i-304 kunye ne-316L zifumaneka kwiindidi ezifanayo zobushushu (zifakwe kwi-full hard), kwaye umahluko woomatshini mncinci kakhulu.uluhlu lweemveliso zekhoyili ezibonisiweyoibandakanya zombini iiklasi ngobukhulu ukusuka kwi-0.3 mm ukuya kwi-4.0 mm, kunye nokugqitywa komphezulu we-2B, i-BA, iNombolo 4, kunye ne-HL. Ukuze ufumane ii-temperature ezifanayo kwimo ye-cold-rolled cold:
| Ipropati | 304 (Ihlaziyiwe) | 316L (Ifakwe kwi-Anneal) |
|---|---|---|
| Amandla okuxinana (MPa) | 515–690 | 485–690 |
| Amandla okuvelisa yi-0.2% (MPa) | 205–345 | 170–345 |
| Ukwandiswa % | 40–60% | 40–60% |
| Ubunzima (HRB) | 82–92 | 79–92 |
| Imodulus yokuthamba (GPa) | 193 | 193 |
I-316L inamandla esivuno aphantsi kancinci kwimeko ye-annealed ngenxa yomxholo wekhabhoni ophantsi, kodwa umahluko awubonakali kangako ekucutshungulweni kwe-coil okusebenzayo. Zombini iiklasi zenza, zigobe, zigximfize, kwaye zidibanise ngokufanayo. Isigqibo soomatshini phakathi kwazo asisosizathu esiqhubayo - imeko yokugqwala imisela ukhetho. Kwizicelo ezifuna amanqanaba athile obushushu kwimo ye-coil, zombini i-304 kunye ne-316L ziyafumaneka kwi-temperature efanayo - i-annealed, i-1/4H, i-1/2H, kunye ne-full hard - kumgca wethu wemveliso. Umthengi okhetha phakathi kwezi klasi zimbini ke ngoko unokuchaza i-temperament efanayo kuyo nayiphi na into ngaphandle kwenkxalabo yepropathi yoomatshini.
Imigangatho yoshishino efana neuthelekiso lwe-304 vs 316 oluvela kwiziko elikhulu leenkonzo zesinyithizigxininisa rhoqo kwisigqibo esifanayo: xa isicelo siquka amanzi anetyuwa, ukucutshungulwa kweekhemikhali, okanye ukuvezwa ngaphandle elunxwemeni, i-316L yeyona nkcazelo ifanelekileyo nangona ixabiso layo liphezulu kwangaphambili.
Uhlalutyo lokwahluka kweendleko — Ngaba i-316L Premium ifanelekile?
Umahluko wexabiso phakathi kwe-304 kunye ne-316L coil eqengqelekayo ebandayo uyatshintsha-tshintsha ngokwexabiso le-nickel kunye ne-molybdenum. Ukusukela phakathi kowama-2026, ngokusekelwe kumaxabiso e-FOB Ningbo kwi-Grade 304 kunye ne-316L kwi-2B finish, ubukhulu obuyi-1.0–3.0 mm, kububanzi be-coil eqhelekileyo:
- Ikhoyili engama-304 (2B, eqengqelekayo ngokubandayo):$2,800–$3,200 ngetoni nganye
- Ikhoyili ye-316L (2B, eqengqelekayo ngokubandayo):$3,800–$4,400 ngetoni nganye
- Iprimiyamu:35–40% ngaphezulu kwama-304
Le ntlawulo kufuneka ivavanywe ngokwexabiso lokutshintshwa okunxulumene nokugqwala. Ngokusekelwe kwiincoko zethu nabathengi beshishini lolwandle kunye neekhemikhali, umjikelo oqhelekileyo wokutshintshwa okuqhutywa kukugqwala uquka:
- Ixabiso lezinto eziphathekayo:Ikhoyili yokutshintsha ngexabiso lemarike langoku (idla ngokuba phezulu nge-15–25% kunexabiso lokuqala ngenxa yophawu lwexesha lokuqalisa)
- Iindleko zokwenza:Ukusika, ukwenza, ukuwelda, kunye nokugqiba umphezulu wezinto ezitshintshiweyo — ngesiqhelo yi-50–100% yexabiso lokuqala lokwenziwa
- Ixesha lokungasebenzi kofakelo:Kwimibhobho yezityalo zeekhemikhali okanye izinto zokwakha zaselwandle, ixesha lokungasebenzi kwemveliso ngexesha lokutshintshwa yeyona nto ibiza kakhulu - idla ngokuba yi-2–5× ixabiso lezinto kunye nokuveliswa kwazo zidibene.
- Umngcipheko wewaranti:Uxanduva olongezelelweyo ukuba ukugqwala kubangela ukungaphumeleli kwangaphambili kofakelo lomthengi
Ukubalwa kweendleko zomjikelo wobomi olula kwisakhiwo solwandle: iitoni ezi-5 ze-2.0 mm 304 coil zibiza i-$15,000. Ubomi benkonzo obulindelekileyo kwindawo eselunxwemeni: iminyaka emi-4-6 ngaphambi kokuba i-pit ebonakalayo ifune ukutshintshwa. I-316L coil yokusetyenziswa okufanayo ibiza i-$21,000 (iprimiyamu engama-40%). Ubomi benkonzo obulindelekileyo ngaphambi kokuba i-pit ifakwe: iminyaka eli-12-15. Kwixesha leminyaka eli-15, ukhetho lwe-304 lufuna ukutshintshwa oku-2-3, okufikelela kwi-$30,000–$45,000 kwiindleko zezinto kunye nomsebenzi wokufakela. Ukhetho lwe-316L lufuna ukuthengwa kube kanye nge-$21,000 kwaye akukho kutshintshwa. Kwimfuneko yobomi benkonzo yeminyaka eli-10 nangaphezulu, i-316L iyonga kakhulu.
Isakhelo seSigqibo: Ixesha lokuCacisa iKhoyili ye-304 vs 316L
| Indawo yeNkonzo | Inqanaba leKloridi | Ubushushu | Ubomi beNkonzo | Ingcebiso |
|---|---|---|---|---|
| Uyilo lwangaphakathi, i-HVAC | < 50 ppm | < 35°C | Iminyaka eli-10–20 | 304 — yanele |
| Ingaphandle yesakhiwo esiselunxwemeni | 100–500 ppm | < 35°C | Iminyaka emi-5–10 | 304 (iyamkeleka), 316L (iyakhethwa) |
| Ulwakhiwo lolwandle (ukutshiza kwamanzi anetyuwa ngokuthe ngqo) | > 1,000 ppm | < 40°C | iminyaka eli-10 nangaphezulu | 316L — inyanzelekile |
| Isityalo seekhemikhali, esingeyiyo i-chloride | < 50 ppm | < 100°C | Iminyaka emi-5–15 | 304 — yanele |
| Isityalo seekhemikhali, umjelo wenkqubo yekloride | 500–5,000 ppm | 30–80°C | Iminyaka emi-5 nangaphezulu | 316L — inyanzelekile |
| Ukulungiswa kokutya, iindawo zokuhlamba impahla | < 200 ppm | < 50°C | Iminyaka emi-5–10 | 304 — yanele |
| Iqonga laselwandle, izixhobo ezisecaleni eliphezulu | > 10,000 ppm | Indalo | iminyaka eli-15 nangaphezulu | 316L — inyanzelekile; cinga nge-duplex xa usenza izinto ezigqithisileyo |
Isiphelo
Ukukhetha phakathi kwe-304 kunye ne-316L yentsimbi engagqwaliyo yokusetyenziswa kwishishini lolwandle kunye neekhemikhali kuchazwa ziinguqu ezintathu: uxinzelelo lwe-chloride, ubushushu bokusebenza obuhambelana ne-CPT, kunye nobomi benkonzo obufunekayo. I-304 yanele kwiindawo zangaphakathi, ezine-chloride ephantsi, kunye neendawo ezinobushushu obuphakathi apho ukutshintshwa kunokwenzeka kwiminyaka emi-5-8. I-316L iyimfuneko kuyo nayiphi na indlela yokufaka ebandakanya ukuvezwa ngqo kwamanzi anetyuwa, inkqubo ye-chloride idlula i-200 ppm kumaqondo obushushu aphezulu, okanye iimfuno zobomi benkonzo ezidlula iminyaka eli-10 kwiindawo ezikunxweme. Iprimiyamu yexabiso le-35-40% ye-316L ifunyanwa kumjikelo wokuqala wokutshintshwa othintelweyo.Intsimbi Engagqwaliyo yaseNingbo, sibonelela zombini iiklasi ngokulandelela okupheleleyo kwezixhobo zokugaya, isiqinisekiso seekhemikhali kunye nesoomatshini, kunye nedatha yovavanyo lokugqwala xa iceliwe. Ukuze ufumane amaxabiso angoku kunye nokufumaneka kwesitokhwe kwiIkhoyili yentsimbi engagqwaliyo engama-304 kunye ne-316L, nxibelelana neqela lethu lokuthengisa malunga nobubanzi, ubukhulu, kunye neemfuno zakho zokugqitywa komphezulu.
Imibuzo ebuzwa qho
Yintoni umahluko ophambili phakathi kwekhoyili yentsimbi engagqwaliyo engama-304 kunye ne-316L?
I-316L iqulethe i-molybdenum eyi-2.0–3.0%, leyo i-304 ingenayo. I-Molybdenum iphucula kakhulu ukumelana nokugqwala kwemingxuma kunye ne-cravice kwiindawo ze-chloride. Oku kunika i-316L i-PREN (Pitting Resistance Equivalent Number) eyi-~24–26 xa kuthelekiswa ne-~19 kwi-304.
Ixabisa malini i-316L xa ithelekiswa ne-304?
Ukusukela phakathi kowama-2026, i-coil eqhotsiweyo ebandayo ye-316L inexabiso eliphantsi le-35–40% ngaphezulu kwe-304 kwimarike yokuthumela ngaphandle yaseTshayina. Umahluko ochanekileyo uyatshintsha-tshintsha ngokwexabiso lempahla ye-nickel kunye ne-molybdenum. Ngeenjongo zohlahlo-lwabiwo mali, lindela i-$3,800–$4,400 ngetoni nganye ye-metric kwi-316L xa kuthelekiswa ne-$2,800–$3,200 kwi-304.
Ngaba i-316L ingadityaniswa ngendlela efanayo ne-304?
Ewe — zombini ezi ntlobo ziintsimbi ezingenasici ze-austenitic ezine-weldability entle kakhulu kusetyenziswa iindlela ze-TIG, MIG, okanye iindlela ze-resistance welding. Umxholo we-316L wekhabhoni ephantsi (0.030% max) uyinika inzuzo: iyamelana ngakumbi nokuziva (imvula ye-chromium carbide kwimida yeenkozo) kwindawo echaphazelekileyo bubushushu ngexesha le-welding, oko kuthetha ukuba igcina ukumelana nokugqwala emva kwe-welding ngaphandle kokufuna isisombululo se-post-weld annealing.
Ingaba i-316L isoloko ingcono kune-304 yokusetyenziswa elwandle?
Ewe, kuyo nayiphi na into yokwakha okanye ethwala umthwalo edibana ngqo namanzi olwandle okanye i-marine spray. I-304 kwindawo yolwandle iya kuqala ukugrumba kwisithuba seminyaka emi-2-4 kwimiphetho enqunqiweyo kunye neendawo zokuwelda. I-316L yandisa ukuqala kokugrumba ukuya kwiminyaka esi-8-12. Kwizicelo ezingaphezulu kwendawo yokutshiza (umz., iimitha ezingama-50+ ngaphakathi konxweme), i-304 inokwanela ukuba umphezulu unokugcinwa kwaye uhlolwe rhoqo.
Ngaba ukugqitywa komphezulu kuyayichaphazela indlela enganyangekiyo ngayo i-304 vs 316L coil?
Ewe — ukugqitywa komphezulu okugudileyo (2B, No. 4, okanye BA) kunika ukumelana nokugqwala okungcono kunomphezulu orhabaxa (No. 1 ojijekileyo, okanye ocoliweyo) kuba zimbalwa iindawo zokuqalisa i-nucleation. Nangona kunjalo, umahluko phakathi kwe-304 kunye ne-316L uhlala ufana nokuba ukugqitywa kunjani: i-316L ekugqityweni kwe-2B isaphumelela ngaphezu kwe-304 ekugqityweni kwe-2B ngomda ofanayo.
Ingakanani iqondo lobushushu elibalulekileyo le-304 xa lithelekiswa ne-316L?
Kwisisombululo se-NaCl esiyi-3.5% (esilinganisa amanzi olwandle), i-304 inobushushu obubalulekileyo bokufaka imingxuma (CPT) obumalunga ne-35°C, ngelixa i-316L ine-CPT emalunga ne-55°C. Oku kuthetha ukuba i-316L ingasetyenziswa ngokukhuselekileyo emanzini olwandle kumaqondo obushushu afikelela kwi-55°C ngaphambi kokuba imingxuma iqale ngokuzenzekelayo, ngelixa i-304 sele ingena kwindawo enobungozi bokufaka imingxuma engaphezulu kwe-35°C.
Ndingayisebenzisa i-304 coil kwizityalo zeekhemikhali?
Ewe — kodwa kuphela kwiindawo ezingezizo iikloridi. I-304 isetyenziswa kakhulu kwimibhobho yezityalo zeekhemikhali, kwimikhumbi, nakwizinto ezakhiweyo ze-sulfuric acid (ukuya kuthi ga kwi-50%), i-nitric acid, kunye neekhemikhali ze-organic. Kuyo nayiphi na inkqubo equlethe iikloridi — nokuba ziingqokelela ezincinci ezingaphezulu kwe-50 ppm — i-316L yeyona nkcazelo incinci.
Ibhalwe nguMnu. Chen — uMlawuli wezoBugcisa kwiNingbo Stainless Steel Co., Ltd. Ingcali ekukhetheni izinto zentsimbi engagqwaliyo, usetyenziso lokuqengqeleka okubandayo, kunye nezisombululo zobonelelo lwemizi-mveliso. Qhagamshela:I-Instagram | I-Facebook
Ixesha leposi: Julayi-15-2026
