TL;DR:Abathengi bemboni yasolwandle kanye namakhemikhali abathola usizoikhoyili yensimbi engagqwaliubhekene nesinqumo esiphindaphindayo: khokha iphrimiyamu engu-30–40% ngo-316L noma uhlale no-304. Lo mbiko uqhathanisa womabili amazinga kusetshenziswa i-neutral salt spray (ASTM B117) kanye nedatha yokuhlolwa kokugqwala kwe-cyclic evela elabhorethri yethu e-Ningbo Stainless Steel, kanye nedatha yokugqwala kwensimu evela ekufakweni kwezitshalo zasogwini nezamakhemikhali. Uhlaka lwesinqumo lugxile ezinguqukweni ezintathu: ukuhlushwa kwe-chloride, izinga lokushisa lokusebenza, kanye nokuphila kwesevisi okudingekayo.
Kungani Isinqumo se-304 vs 316L Singenakwenziwa Ngentengo Yodwa
Endimeni yami njengoMqondisi Wezobuchwepheshe e-Ningbo Stainless Steel, ngibuyekeza imininingwane yezinto zokwakha zamakhulu ezinkampaniikhoyili yensimbi engagqwali egoqwe ngokubandayoAma-oda njalo ngonyaka. Umbuzo we-304 vs 316L yingxoxo eyodwa yobuchwepheshe evame kakhulu engiba nayo nabathengi. Umphathi wokuthenga womkhiqizi wemishini yasolwandle wake wangitshela ukuthi, “Besisebenzisa i-304 iminyaka eyishumi nanhlanu. Isebenza kahle — angiboni ukuthi kungani kufanele sikhokhe imali eyengeziwe nge-316L.” Ezinyangeni eziyisithupha kamuva, inkampani yakhe kwadingeka ishintshe iqoqo lezingxenye ezakhiwe nge-coil ezingu-304 kuphrojekthi yokususa usawoti ogwini ngoba ukugqwala kwemigodi kwakudale imigodi ejulile engu-0.3 mm ngemuva kweminyaka engaphansi kwemibili yesevisi. Ukufakwa esikhundleni kwe-316L kubize u-40% ngaphezulu kusengaphambili kodwa akubonisi mgodi eminyakeni emithathu yokusebenza.
Isinqumo phakathi kwekhoyili yensimbi engagqwali engu-304 nengu-316L asimayelana nokuthi yiliphi izinga "elingcono." Simayelana nokufanisa iphrofayili yokumelana nokugqwala kwezinto nendawo yesevisi - nokuqonda ukuthi udinga isikhathi esingakanani ukufakwa ngaphambi kokuba kudingeke ukushintshwa okuhlobene nokugqwala. Lokhu kuqhathanisa kunikeza amaphuzu edatha owadingayo ukuze wenze leso sinqumo amehlo akho evulekile.
Ukwakheka Kwamakhemikhali: Umehluko weMolybdenum
Umehluko oyinhloko phakathi kuka-304 no-316L ukwengezwa ngamabomu kwe-molybdenum engu-2.0–3.0% ku-316L. I-Molybdenum iyinto ezinzisa i-ferrite ethuthukisa kakhulu ukumelana nokugqwala kwendawo — ikakhulukazi ukugqwala kwemigodi kanye nokuqhekeka ezindaweni eziqukethe i-chloride.
| Isici | 304 (UNS S30400) | 316L (UNS S31603) | Indlela Okuthinta Ngayo Ukusebenza |
|---|---|---|---|
| I-Chromium (Cr) | 18.0–20.0% | 16.0–18.0% | Ukwakheka kwefilimu engasebenzi — womabili amazinga anele |
| I-Nickel (Ni) | 8.0–10.5% | 10.0–14.0% | Ukuzinza kwe-Austenite, ukwakheka kwayo |
| I-Molybdenum (Mo) | — | 2.0–3.0% | Isici esibalulekile - ukumelana nomgodi |
| Ikhabhoni (C, ubuningi) | 0.08% | 0.030% | Ukwehlisa ikhabhoni ku-316L kunciphisa ukuzwela ngesikhathi sokushisela |
| I-PREN (Ukumelana Nokugoba Okulinganayo) | ~19 | ~24–26 | I-PREN = %Cr + 3.3×%Mo + 16×%N; ephezulu = engcono |
Inani le-PREN liyisici esihlukanisayo senombolo eyodwa. I-PREN engu-19 isho ukuthi u-304 ufanelekela izindawo ezinamazinga e-chloride afinyelela cishe ku-200 ppm emazingeni okushisa azungezile. I-316L ene-PREN engu-24–26 yelula lowo mkhawulo ube cishe ku-1,000 ppm chloride. Leli nani linquma ukuthi ibanga ngalinye lingasetshenziswa kuphi ngaphandle kokugqwala okusheshayo kwendawo.
Ukuhlolwa Kokufutha Usawoti Ongathathi Nhlangothi (ASTM B117) — Ukuqhathaniswa Kwelabhorethri
Ilabhorethri yethu yenze ukuhlolwa kokufutha usawoti ongathathi hlangothi kwamahora ayi-1,000 nge-ASTM B117 kumasampula ekhoyili aqoqwe ngokubandayo angu-304 kanye no-316L (ukuphela kwe-2B, ubukhulu obungu-1.0 mm). Amapharamitha okuhlola: Isixazululo se-NaCl esingu-5%, izinga lokushisa legumbi elingu-35°C, ukufutha okuqhubekayo. Imiphumela ihlolwe ngezikhawu zamahora ayi-100.
| Isikhathi sokuchayeka | 304 — Ukuqaphela Ukugqwala | 316L — Ukuqaphelwa Kokugqwala |
|---|---|---|
| Amahora ayi-100 | Umbala omncane wobuso emaphethelweni | Akukho ushintsho olubonakalayo |
| Amahora angu-300 | Indawo engaphezulu engu-5–8% enamabala okugqwala aqondile | Akukho ushintsho olubonakalayo |
| Amahora angu-500 | Indawo engaphezulu engu-15–20% igqwalile, idayi ebonakalayo | Ukudweba ngomkhondo emaphethelweni asikiwe kuphela |
| Amahora angu-750 | Ukugqwala komhlaba okungu-40%+, kwakheka imigodi ethile | Kubonakala kuphela emaphethelweni, ngaphansi kwendawo engu-1% |
| Amahora ayi-1,000 | >60% ukugqwala kwendawo, ukujula komgodi okungu-0.05–0.15 mm | Ukufaka umbala emaphethelweni, akukho ukugoba ezindaweni ezisicaba |
Endaweni yokufutha usawoti elawulwayo, i-304 ibonise ukuqala kokugqwala okufanayo ngemva kwamahora angu-300 kanye nokufakwa kwemigodi okulinganiselwe ngemva kwamahora angu-750. I-316L yasinda amahora angu-1,000 ngokufakwa kwemibala emaphethelweni kuphela - akukho ukugqwala endaweni eyisicaba. "Isikhathi sokuqala kwemigodi" se-304 sasicishe sibe amahora angu-300 uma kuqhathaniswa namahora angaphezu kwe-1,000 e-316L - ukuthuthuka okungaphezu kwamahora amathathu.
Kubalulekile ukuqaphela ukuthi i-ASTM B117 salt spray iyisivivinyo sokuqhathanisa, hhayi isibikezeli sempilo yesevisi. Izimo ezisheshayo ziveza imiphumela ehambisana - kodwa engahumushi ngokuqondile - ukusebenza kwensimu. Kodwa-ke, umehluko ophakathi kwamazinga amabili uthembekile ngokwendlela.
Ukuhlolwa Kokugqwala Okujikelezayo — Ukulingisa Izindawo Zasogwini Nezimboni
Ukuze sibonise kangcono ukuchayeka emhlabeni wangempela, senze ukuhlolwa kokugqwala okujikelezayo (i-ASTM G85-A5 eguquliwe, umjikelezo wamahora angama-24: amahora ama-2 okufuthwa ngosawoti + amahora angama-22 angu-95% RH ku-35°C) ngaphezu kwemijikelezo engama-500 kuzo zombili izinhlobo ezinesimo esigoqiwe esilingisa izingxenye ezicutshungulwe nge-coil. Imiphumela isebenza ngqo ezindaweni zasolwandle nezamakhemikhali:
- Ikhoyili engu-304:Ukugoba kwaqalwa ngemijikelezo eyi-120, kugxilwe emaphethelweni aqoshiwe. Izinga lokukhula kwemigodi lilinganiselwa ku-0.008 mm ngomjikelezo ngamunye phakathi kwemijikelezo eyi-120-300, lehla laya ku-0.003 mm ngomjikelezo ngamunye ngemva kwemijikelezo engama-300 (kunqunyelwe yi-anodic polarization). Ngemva kwemijikelezo engama-500, ukujula okuphezulu kwemigodi kwakungu-0.28 mm, kanye nemigodi eyi-15-20 nge-100 cm² edlula ukujula okungu-0.1 mm.
- Ikhoyili engu-316L:Ukuqala komgodi okokuqala ngemijikelezo engu-380 — futhi emaphethelweni aqoshiwe kodwa hhayi ebusweni be-coil eyisicaba. Izinga lokukhula komgodi lilinganiselwa ku-0.002 mm ngomjikelezo ngamunye. Ngemva kwemijikelezo engu-500, ukujula okuphezulu komgodi kwakungu-0.06 mm, kanti imigodi engaphansi kwe-3 ku-100 cm² idlula ukujula okungu-0.05 mm.
Idatha yokuhlola ejikelezayo iqinisekisa ukuthi umehluko obalulekile phakathi kuka-304 no-316L usesikhathini sokuqala komgodi. I-316L ilibazisa ukuqala komgodi ngesilinganiso esingaba ngu-3× uma kuqhathaniswa ne-304. Ukuze ukufakwa kolwandle kuhlale iminyaka eyi-10, i-304 izoqala ukubonisa ukugqwala emaphethelweni asikiwe zingakapheli iminyaka emi-2-3, kuyilapho i-316L izohlala ingathinteki iminyaka engu-8-10 ngaphambi kokuba kubonakale umgodi omncane onqenqemeni.
Lokhu okutholakele kuhambisana nezifundo zasensimini ezishicilelwe mayelana nokugqwala kwensimbi engagqwali ezindaweni zezimboni nezasolwandle. Ucwaningo oluzimele oluqhathanisa ama-304 nama-316L abhekene nezimo ezixubile zezimboni nezasolwandle nezasemadolobheni luqinisekisa ukuthi ama-316L abonisaukumelana nemigodi okungcono kakhulu ezindaweni ze-chloride ngenxa yokuqukethwe kwayo kwe-molybdenumKubathengi abangakwazi ukuqhuba izivivinyo zabo zokugqwala ezijikelezayo, lokhu kuqhathanisa okushicilelwe okuvela embonini yezinsimbi kunikeza isisekelo esithembekile sokubhekisela.
Ngaphezu kwalokho, umphumela womphetho osikiwe obonwe esivivinyweni sethu — lapho ukugoba kuqala khona kakhulu emaphethelweni aqoshiwe noma aqoshiwe — kunemiphumela ebalulekile esebenzayo kubathengi bekhoyili. Ikhoyili ehlukaniswe ububanzi endaweni yokusabalalisa idala imiphetho emisha eqoshiwe kuzo zombili izinhlangothi zomucu ngamunye. Lezi ziphetho azinawo ifilimu evikelayo ye-chromium oxide passive ekhona ebusweni bekhoyili egoqiwe ngakho-ke imelela iphuzu elibuthakathaka kakhulu kuchungechunge lokugqwala. Lapho ngichaza ikhoyili yezicelo zasolwandle noma zamakhemikhali, ngincoma ukucela isimo somphetho wokugaya (lapho kungenzeka khona) noma ukucacisa ukwelashwa kokuphambuka komphetho — i-nitric acid noma i-citric acid passivation ngokwe-ASTM A967 — njengesinyathelo sangemuva kokuphambuka.
Amandla Okuphonsa I-Pitting — Ukulinganisa Kwe-Electrochemical
Ilabhorethri yethu yenze ama-potentiodynamic polarization scans (ASTM G61) kuzo zombili izinhlobo kusisombululo se-NaCl esingu-3.5% (cishe usawoti wamanzi olwandle) ku-25°C kanye no-50°C. Amandla okufaka imigodi (i-Epit) yi-voltage lapho ifilimu engasebenzi iphuka khona futhi kuqala ukukhula kwemigodi okuzinzile - amanani aphezulu abonisa ukumelana okungcono.
| Ipharamitha | 304 ku-3.5% NaCl | 316L ku-3.5% NaCl |
|---|---|---|
| Phuma ku-25°C | +0.28 V (uma kuqhathaniswa ne-SCE) | +0.45 V (uma kuqhathaniswa ne-SCE) |
| Phuma ku-50°C | +0.12 V (uma kuqhathaniswa ne-SCE) | +0.33 V (uma kuqhathaniswa ne-SCE) |
| Izinga lokushisa elibucayi lemigodi (CPT) | ~35°C | ~55°C |
| Ubuningi bamanje obungasebenzi | 0.8 µA/cm² | 0.4 µA/cm² |
Izinga lokushisa elibalulekile lemigodi (CPT) liwumkhawulo osebenzayo: ngaphansi kwaleli zinga lokushisa, ifilimu engasebenzi ihlala izinzile ngisho nasendaweni ene-chloride. Ngaphezu kwayo, imigodi iqala ngokuzenzakalelayo. I-304 ine-CPT engaba ngu-35°C emanzini olwandle - okusho ukuthi isengozini kunoma yikuphi ukusetshenziswa kolwandle lapho ubuso bezinto budlula khona u-35°C (ilanga eliqondile elisogwini ezingxenyeni ezincane ze-coil, isibonelo). I-316L ene-CPT engu-55°C ihlanganisa cishe zonke izinhlelo zokusebenza zolwandle ezisezingeni lokushisa elizungezile ngaphandle kwengozi yemigodi.
Izakhiwo Zemishini — Amandla Okuqina Nokwakheka
Zombili i-304 ne-316L zitholakala ngezilinganiso ezifanayo ze-temperature (zifakwe ku-full hard), futhi umehluko womshini mncane kakhulu.uhla lomkhiqizo wekhoyili eveleleifaka phakathi kokubili amazinga ngobukhulu obusukela ku-0.3 mm kuya ku-4.0 mm, kanye nokuqedwa kobuso okungu-2B, BA, No. 4, kanye ne-HL. Ukuze uthole amazinga okushisa afanayo ngesimo sekhoyili egoqekile ebandayo:
| Impahla | 304 (Kufakwe uphawu) | 316L (Ivaliwe) |
|---|---|---|
| Amandla okudonsa (i-MPa) | 515–690 | 485–690 |
| Amandla okukhiqiza angu-0.2% (MPa) | 205–345 | 170–345 |
| Ukwandiswa % | 40–60% | 40–60% |
| Ubulukhuni (HRB) | 82–92 | 79–92 |
| I-Modulus of elasticity (GPa) | 193 | 193 |
I-316L inamandla okukhiqiza aphansi kancane esimweni sokugoba ngenxa yokuqukethwe kwekhabhoni okuphansi, kodwa umehluko awubalulekile ekucutshungulweni kwekhoyili okusebenzayo. Womabili amagremu akha, agoba, agxivize, futhi ashise ngendlela efanayo. Isinqumo somshini phakathi kwawo asikaze sibe yisici esiqhubayo - indawo yokugqwala inquma ukukhetha. Ngezinhlelo zokusebenza ezidinga amazinga athile okushisa ngesimo sekhoyili, womabili ama-304 nama-316L atholakala ngama-temperament afanayo - annealed, 1/4H, 1/2H, kanye ne-full hard - kusuka kumugqa wethu wokukhiqiza. Umthengi okhetha phakathi kwala magremu amabili angacacisa i-temperament efanayo kunoma iyiphi impahla ngaphandle kokukhathazeka ngempahla yomshini.
Izindinganiso zemboni ezifanaukuqhathanisa okungu-304 vs 316 okuvela ezikhungweni ezinkulu zesevisi yensimbizigcizelela njalo isiphetho esifanayo: lapho ukusetshenziswa kuhilela amanzi anosawoti, ukucutshungulwa kwamakhemikhali, noma ukuchayeka ogwini lolwandle ngaphandle, i-316L iyincazelo efanele naphezu kwezindleko zayo eziphezulu kusengaphambili.
Ukuhlaziywa Kokwehluka Kwezindleko — Ingabe i-Premium engu-316L Ikufanele?
Umehluko wezindleko phakathi kwekhoyili egoqekile ebandayo engu-304 kanye ne-316L uyashintshashintsha ngentengo ye-nickel kanye ne-molybdenum. Kusukela maphakathi no-2026, ngokusekelwe entengo ye-FOB Ningbo yeBanga 304 kanye ne-316L ekuqedeni okungu-2B, ubukhulu obungu-1.0–3.0 mm, ngobubanzi bekhoyili obujwayelekile:
- Ikhoyili engu-304 (2B, egoqwe ngokubandayo):$2,800–$3,200 ngethani ngalinye
- Ikhoyili engu-316L (2B, egoqwe ngokubandayo):$3,800–$4,400 ngethani ngalinye
- I-Premium:35–40% ngaphezu kuka-304
Le phrimiyamu kumele ihlolwe ngokwezindleko zokushintsha okuhlobene nokugqwala. Ngokusekelwe ezingxoxweni zethu namakhasimende embonini yasolwandle kanye namakhemikhali, umjikelezo wokushintsha ojwayelekile oqhutshwa ukugqwala uhlanganisa:
- Izindleko zezinto:Ikhoyili yokufaka esikhundleni ngentengo yamanje yemakethe (ngokuvamile iphakeme ngo-15–25% kunokuthenga kokuqala ngenxa yophawu lwesikhathi sokuhola)
- Izindleko zokukhiqiza:Ukusika, ukwakha, ukushisela, kanye nokuqedela izingxenye ezithathelwa indawo — ngokuvamile u-50–100% wezindleko zokukhiqiza zokuqala
- Isikhathi sokungasebenzi kokufakwa:Kumapayipi ezitshalo zamakhemikhali noma izingxenye zesakhiwo sasolwandle, isikhathi sokungasebenzi kokukhiqiza ngesikhathi sokushintsha yisona sizathu esikhulu kunazo zonke sezindleko - ngokuvamile izindleko zezinto zokwakha kanye nokukhiqiza zihlanganisiwe ngama-2-5 ×.
- Ingozi yewaranti:Isibopho esengeziwe uma ukugqwala kubangela ukwehluleka kwangaphambi kwesikhathi ekufakweni kwekhasimende
Ukubalwa kwezindleko zomjikelezo wokuphila okulula kwengxenye yesakhiwo sasolwandle: amathani ama-5 ekhoyili engu-2.0 mm 304 abiza u-$15,000. Impilo yesevisi elindelekile endaweni esogwini: iminyaka engu-4-6 ngaphambi kokufakwa kwekhoyili ebonakalayo idinga ukushintshwa. Ikhoyili engu-316L yokusetshenziswa okufanayo ibiza u-$21,000 (iprimiyamu engu-40%). Impilo yesevisi elindelekile ngaphambi kokufakwa kwekhoyili: iminyaka engu-12-15. Esikhathini seminyaka engu-15, inketho engu-304 idinga ukushintshwa okungu-2-3, okubiza u-$30,000–$45,000 ngezindleko zezinto kanye nomsebenzi wokufaka. Inketho engu-316L idinga ukuthengwa okukodwa ngo-$21,000 kanye nokungabikho kokufakwa kwekhoyili. Ngesidingo sempilo yesevisi yeminyaka engaphezu kwengu-10, i-316L iyonga kakhulu ngokungenakuphikiswa.
Uhlaka Lwezinqumo: Isikhathi Sokucacisa Ikhoyili ye-304 vs 316L
| Indawo Yesevisi | Izinga le-Chloride | Izinga lokushisa | Impilo Yesevisi | Isincomo |
|---|---|---|---|---|
| Ukwakhiwa kwezakhiwo zangaphakathi, i-HVAC | < 50 ppm | < 35°C | Iminyaka eyi-10–20 | 304 — kwanele |
| Ingaphandle lesakhiwo esisogwini | 100–500 ppm | < 35°C | Iminyaka emi-5–10 | 304 (iyamukeleka), 316L (iyathandwa) |
| Ukwakheka kolwandle (ukuchaphaza kwamanzi anosawoti ngqo) | > 1,000 ppm | < 40°C | Iminyaka eyi-10+ | 316L — okuphoqelekile |
| Isitshalo samakhemikhali, esingeyona i-chloride | < 50 ppm | < 100°C | Iminyaka emi-5–15 | 304 — kwanele |
| Isitshalo samakhemikhali, umfudlana wenqubo ye-chloride | 500–5,000 ppm | 30–80°C | Iminyaka engu-5+ | 316L — okuphoqelekile |
| Ukucubungula ukudla, izindawo zokuhlanza | < 200 ppm | < 50°C | Iminyaka emi-5–10 | 304 — kwanele |
| Ipulatifomu yasogwini, imishini eseceleni | > 10,000 ppm | I-Ambient | Iminyaka engu-15+ | 316L — kuyimpoqo; cabanga nge-duplex uma kukhulunywa kakhulu |
Isiphetho
Ukukhetha phakathi kwekhoyili yensimbi engagqwali engu-304 nengu-316L yezicelo zasemanzini nezamakhemikhali kuchazwa yizinto ezintathu eziguquguqukayo: ukuhlushwa kwe-chloride, izinga lokushisa lokusebenza uma kuqhathaniswa ne-CPT, kanye nokuphila kwesevisi okudingekayo. I-304 yanele ezindaweni zangaphakathi, ezine-chloride ephansi, kanye nezimo zokushisa eziphakathi nendawo lapho ukushintshwa kungenzeka khona phakathi neminyaka engu-5-8. I-316L iyimpoqo kunoma yikuphi ukusetshenziswa okubandakanya ukuchayeka ngqo emanzini anosawoti, ukugeleza kwenqubo ye-chloride ngaphezu kuka-200 ppm emazingeni okushisa aphezulu, noma izidingo zokuphila kwesevisi ezingaphezu kweminyaka eyi-10 ezindaweni ezisogwini. Iprimiyamu yezindleko engu-35-40% ye-316L ibuyiswa emjikelezweni wokuqala wokufaka esikhundleni ogwenyiwe.Insimbi Engagqwali yaseNingbo, sinikeza womabili amazinga ngokulandelela okugcwele komshini wokugaya, isitifiketi samakhemikhali nesomshini, kanye nedatha yokuhlola ukugqwala uma iceliwe. Ukuze uthole amanani amanje kanye nokutholakala kwesitoko ku-Ikhoyili yensimbi engagqwali engu-304 kanye no-316L, xhumana nethimba lethu lokuthengisa ngezidingo zakho ezithile zobubanzi, ukujiya, kanye nokuqeda ubuso.
imibuzo ejwayelekile ukubuzwa
Uyini umehluko omkhulu phakathi kwekhoyili yensimbi engagqwali engu-304 kanye ne-316L?
I-316L iqukethe i-molybdenum engu-2.0–3.0%, i-304 engenayo. I-Molybdenum ithuthukisa kakhulu ukumelana nokugqwala kwemigodi kanye nokuqhekeka ezindaweni ze-chloride. Lokhu kunikeza i-316L i-PREN (Pitting Resistance Equivalent Number) engu-~24–26 uma kuqhathaniswa ne-~19 ku-304.
Ibiza malini i-316L uma iqhathaniswa ne-304?
Kusukela maphakathi no-2026, i-coil engu-316L egoqekile ebandayo ine-premium engu-35-40% ngaphezu kuka-304 emakethe yokuthumela kwamanye amazwe yaseShayina. Umehluko oqondile uyashintshashintsha ngentengo yezimpahla ze-nickel ne-molybdenum. Ngezinjongo zesabelomali, lindela u-$3,800–$4,400 nge-metric ton ngayinye ngo-316L uma kuqhathaniswa no-$2,800–$3,200 ngo-304.
Ingabe i-316L ingashintshwa ngendlela efanayo ne-304?
Yebo — womabili la mazinga ayizinsimbi ezingagqwali ze-austenitic ezine-weldability enhle kakhulu kusetshenziswa izindlela ze-TIG, MIG, noma ze-resistance welding. Okuqukethwe kwekhabhoni okuphansi kwe-316L (ubuningi obungu-0.030%) kuyinika inzuzo: imelana kakhulu nokuzwela (imvula ye-chromium carbide emingceleni yokusanhlamvu) endaweni ethintekile ekushiseni ngesikhathi sokushisela, okusho ukuthi igcina ukumelana nokugqwala ngemva kokushisela ngaphandle kokudinga isixazululo se-post-weld annealing.
Ingabe i-316L ingcono njalo kune-304 yokusetshenziswa olwandle?
Yebo, kunoma iyiphi ingxenye yesakhiwo noma ethwala umthwalo ethintana ngqo namanzi olwandle noma i-marine spray. I-304 endaweni yasolwandle izoqala ukufaka imigodi zingakapheli iminyaka engu-2-4 emaphethelweni anqunyiwe nasezindaweni zokushisela. I-316L yelula ukuqala kokufaka imigodi ibe yiminyaka engu-8-12. Uma kusetshenziswa ngaphezu kwendawo yokuchaphaza (isb., amamitha angu-50+ ngaphakathi kwezwe ukusuka ogwini), i-304 inganele uma indawo ingagcinwa futhi ihlolwe njalo.
Ingabe ukuqeda kobuso kuthinta ukumelana kokugqwala kwekhoyili engu-304 vs 316L?
Yebo — ukuqeda okubushelelezi kobuso (2B, No. 4, noma i-BA) kunikeza ukumelana okungcono kokugqwala kunendawo elukhuni (No. 1 egoqwe ngokushisa, noma efakwe ukhilimu) ngoba kunezindawo ezimbalwa ze-nucleation zokuqala umgodi. Kodwa-ke, umehluko ophakathi kuka-304 no-316L uhlala ufana kungakhathaliseki ukuqeda: i-316L ekuqedeni kwe-2B isasebenza kangcono kune-304 ekuqedeni kwe-2B ngomkhawulo ofanayo.
Lingakanani izinga lokushisa elibalulekile lomgodi elingu-304 uma liqhathaniswa ne-316L?
Esixazululweni se-NaCl esingu-3.5% (esilinganisa amanzi olwandle), i-304 inokushisa okubalulekile kwemigodi (CPT) okungaba ngu-35°C, kuyilapho i-316L inokushisa okulinganiselwa ku-55°C. Lokhu kusho ukuthi i-316L ingasetshenziswa ngokuphephile emanzini olwandle emazingeni okushisa afinyelela ku-55°C ngaphambi kokuba imigodi iqale ngokuzenzakalelayo, kuyilapho i-304 isivele ingena endaweni eyingozi yemigodi engaphezu kuka-35°C.
Ngingayisebenzisa yini ikhoyili engu-304 ekusetshenzisweni kwezitshalo zamakhemikhali?
Yebo — kodwa kuphela ezindaweni ezingezona i-chloride. I-304 isetshenziswa kabanzi kumapayipi ezitshalo zamakhemikhali, imikhumbi, kanye nezingxenye zesakhiwo ze-sulfuric acid (kufika ku-50%), i-nitric acid, kanye namakhemikhali e-organic. Kunoma iyiphi inqubo equkethe ama-chloride — ngisho namanani amancane angaphezu kuka-50 ppm — i-316L iyincazelo encane kakhulu.
Kubhalwe nguMnu. Chen — Umqondisi Wezobuchwepheshe e-Ningbo Stainless Steel Co., Ltd. Ochwepheshe ekukhetheni izinto zensimbi engagqwali, izinhlelo zokusebenza zokugoqa okubandayo, kanye nezixazululo zokuphakelwa kwezimboni. Xhuma:I-Instagram | I-Facebook
Isikhathi sokuthunyelwe: Julayi-15-2026
