TL; DR:Abaguzi b'inganda zikora imiti yo mu mazi n'iya kijyambereicyuma gifunganyeGufata icyemezo gihoraho: kwishyura ubwishyu bwa 30–40% kuri 316L cyangwa kugumana na 304. Iyi raporo igereranya amanota yombi hakoreshejwe spray y'umunyu utagira aho ubogamiye (ASTM B117) n'amakuru ajyanye n'ibizamini bya corrosion byaturutse muri laboratwari yacu ya Ningbo Stainless Steel, hamwe n'amakuru ajyanye n'ingoboka zo mu butaka zituruka ku nkombe n'inganda zikora imiti. Urwego rw'imyanzuro rushingiye ku bintu bitatu: ingano ya chloride, ubushyuhe bw'imikorere, n'igihe gisabwa cyo kuyikoresha.

Impamvu icyemezo cya 304 na 316L kidashobora gufatwa ku giciro cyonyine

Mu nshingano zanjye nk'Umuyobozi wa Tekiniki muri Ningbo Stainless Steel, nsuzuma ibipimo by'ibikoresho bya amaganaicyuma gikonjesha gikonjeshaGutumiza buri mwaka. Ikibazo cya 304 ugereranyije na 316L ni cyo kiganiro gikunze kuvugwa cyane mu bya tekiniki n'abaguzi. Umuyobozi ushinzwe amasoko mu ruganda rukora ibikoresho byo mu mazi yigeze kumbwira ati: “Tumaze imyaka cumi n'itanu dukoresha 304. Ikora neza — simbona impamvu twagombye kwishyura amafaranga y'inyongera kuri 316L.” Nyuma y'amezi atandatu, ikigo cye cyagombaga gusimbuza igice cy'ibice 304 byakozwe na coil ku mushinga wo gukuramo umunyu ku nkengero z'inyanja kuko ingese yo mu mwobo yari yateje imyobo ifite ubujyakuzimu bwa mm 0.3 nyuma y'imyaka itarenze ibiri ikoreshwa. Gusimbuza 316L byatwaye 40% by'inyongera mbere ariko byagaragaje ko nta mwobo wakozwe mu myaka itatu ishize.

Icyemezo kiri hagati ya 304 na 316L cy'icyuma kidashonga ntabwo ari icyo "kiruta ibindi." Ni ukugereranya imiterere y'ibikoresho birwanya ingese n'aho bikorerwa - no gusobanukirwa igihe ukeneye ko bishyirwamo mbere yuko bikenerwa ko bisimburwa n'ingese. Iri gereranya ritanga amakuru ukeneye kugira ngo ufate icyo cyemezo ufunguye amaso.

Imiterere y'ibinyabutabire: Itandukaniro rya Molybdenum

Itandukaniro ry'ibanze riri hagati ya 304 na 316L ni uko hongewemo molybdenum ya 2.0–3.0% muri 316L. Molybdenum ni ikintu gikomeza ubuziranenge bwa ferrite gituma habaho ubudahangarwa ku ihindagurika ry’ingufu mu gace runaka - cyane cyane icyuho n’ingufu mu bidukikije birimo chloride.

Agaciro ka PREN ni ikimenyetso cy’umubare umwe. PREN ya 19 bivuze ko 304 ikwiriye ahantu hari chloride ingana na 200 ppm ku bushyuhe bw’ikirere. 316L hamwe na PREN ya 24–26 igera kuri 1.000 ppm chloride. Uyu mubare ugena aho buri rwego rushobora gukoreshwa hatabayeho kwangirika vuba.

Ikizamini cyo gutera umunyu mu buryo butari ubwa buri wese (ASTM B117) — Igereranya rya laboratwari

Laboratwari yacu yakoze ikizamini cya spray y'umunyu mu masaha 1.000 kuri buri ASTM B117 ku bipimo bya 304 na 316L bya cold-rolled coil (2B finish, 1.0 mm ubugari). Ibipimo by'ikizamini: 5% NaCl solution, 35°C chamber bushyuhe, spray ikomeza. Ibisubizo byapimwe mu masaha 100.

Mu gihe cyo gutera umunyu mu buryo bwagenzuwe, 304 yagaragaje ko yatangijwe neza nyuma y'amasaha 300 ndetse n'aho yafatiwe mu buryo bungana nyuma y'amasaha 750. 316L zarokotse amasaha 1.000 gusa, nta hantu hashyizwe ibara ku buso burambuye. Igihe cyo gutangira gushyira ibara ku buso cya 304 cyari amasaha agera kuri 300 ugereranyije n'amasaha arenga 1.000 kuri 316L - iterambere rirenze 3×.

Ni ngombwa kumenya ko ASTM B117 umunyu upfapfa ari ikizamini cyo kugereranya, ntabwo ari ikintu gipima ubuzima bw'umusaruro. Imiterere yihuta itanga ibisubizo bifitanye isano - ariko ntibisobanura neza - imikorere y'umusaruro. Ariko, itandukaniro riri hagati y'ibipimo byombi ni iryo kwizerwa mu cyerekezo.

Ikizamini cya Cyclic Corrosion — Kwigana ibidukikije byo ku nkombe n'inganda

Kugira ngo dugaragaze neza uko ibintu bimeze mu buzima busanzwe, twakoze ikizamini cya cyclic corrosion (ASTM G85-A5 yahinduwe, amasaha 24: amasaha 2 yo gusukura umunyu + amasaha 22 95% RH kuri 35°C) ku nshuro 500 ku byiciro byombi hamwe n’imiterere y’ingufu zikozwe mu buryo bwa sima zigaragaza ibice byatunganyijwe. Ibisubizo bifatika ku buryo butaziguye ku bidukikije byo mu mazi no mu bimera:

• 304 coil:Guteranya ibisasu byatangiye ku nshuro 120, byibanze ku nkengero zaciwe. Igipimo cyo gukura kw'ibisasu cyageze kuri 0.008 mm kuri buri ruziga hagati y'ingendo 120-300, bigabanuka bigera kuri 0.003 mm kuri buri ruziga nyuma y'ingendo 300 (bigenzurwa no gutandukanya ibisasu). Nyuma y'ingendo 500, uburebure ntarengwa bw'ibisasu bwari 0.28 mm, aho ibisasu 15-20 kuri cm² 100 birenga uburebure bwa 0.1 mm.
• Koili ya 316L:Gutangira icyobo bwa mbere ku nshuro 380 — no ku nkengero zaciwe ariko ntabwo byari ku buso burambuye. Igipimo cyo gukura cy’icyobo cyageze kuri mm 0.002 kuri buri ruziga. Nyuma y’ingendo 500, uburebure ntarengwa bw’icyobo bwari mm 0.06, aho hari munsi y’ibice 3 kuri cm² 100 birenga uburebure bwa mm 0.05.

Amakuru y’ibizamini by’ikizamini yemeza ko itandukaniro rikomeye riri hagati ya 304 na 316L riri mu gihe cyo gutangira gushyiramo imyobo. 316L itinza gutangira gushyiramo imyobo ku rugero rwa 3× ugereranije na 304. Ku bijyanye n’aho amazi yo mu mazi ashyirwa mu mazi biteganijwe ko azamara imyaka 10, 304 yatangira kugaragaza ingese ku nkengero z’imyobo mu myaka 2-3, mu gihe 316L yagumaho imyaka 8-10 nta ngaruka mbi ifite mbere yuko imyobo mito y’imyobo igaragara.

Ibi byavumbuwe bihuye n’inyigo zasohotse mu bushakashatsi ku byuma bitagira umugese mu bidukikije by’inganda n’inyanja. Ubushakashatsi bwigenga bugereranya 304 na 316L byagaragaye mu bidukikije by’inganda n’inyanja n’imijyi, bwemeza ko 316L igaragazakurwanya imyobo mu duce twa chloride birushaho kuba byiza bitewe n'ingano ya molybdenum irimoKu baguzi badashobora gukoresha ibizamini byabo bwite bya corruption, ibi bigereranyo byasohotse mu nganda z'ibyuma bitanga ishingiro ryizewe.

Byongeye kandi, ingaruka z'inkombe zometseho zagaragaye mu igerageza ryacu - aho gucukura ibintu bitangirira cyane ku nkombe zometseho cyangwa zometseho - bigira ingaruka zikomeye ku bagura coil. Coil iciwe ku bugari mu kigo cy'umucuruzi ikora impande nshya zometseho ku mpande zombi za buri gice. Izi nkombe ntizifite filime irinda chromium oxide passive film iri ku buso bwa coil buzungurutse bityo ikaba ari yo igaragara mu ruhererekane rw'ingufu. Mu gihe ugena coil yo gukoreshwa mu mazi cyangwa mu bya shimi, ndagusaba gusaba imiterere y'inkombe (aho bishoboka) cyangwa kugaragaza uburyo bwo kuvura inkombe - aside nitrique cyangwa aside citric passivation hakurikijwe ASTM A967 - nk'intambwe yo nyuma yo gucukura.

Ubushobozi bwo Gutera Ingufu — Igipimo cy'Uburyo bw'Ingufu z'Amashanyarazi

Laboratwari yacu yakoze scan za potentiodynamic polarization (ASTM G61) ku byiciro byombi mu gisubizo cya 3.5% cya NaCl (ubushyuhe bw'amazi yo mu nyanja hafi) kuri 25°C na 50°C. Ingufu zo gufunga (Epit) ni voltage aho filime idakora icika kandi ikura neza mu mwobo - agaciro ko hejuru kagaragaza ko hari ubudahangarwa bwiza.

Ubushyuhe bw'ibice by'ingenzi (CPT) ni urugero rufatika: munsi y'ubu bushyuhe, firime idahinduka iguma ihamye ndetse no mu kirere cya chloride. Hejuru yacyo, ibice by'ibice bitangira mu buryo butunguranye. 304 ifite CPT ya hafi 35°C mu mazi yo mu nyanja - bivuze ko iri mu kaga mu gihe icyo ari cyo cyose cyo mu mazi gikoreshwa aho ubuso bw'ibintu burenga 35°C (urumuri rw'izuba rwo ku nkombe ku bice byoroheje by'uruziga, urugero). 316L ifite CPT ya 55°C ikora hafi ya byose byo mu mazi bikoreshwa mu bushyuhe bw'ikirere nta ngaruka zo kubikoresha.

Imiterere ya Mekanike — Ingufu zo Gufata no Gukomera

304 na 316L zombi ziboneka mu gipimo kimwe cy'ubushyuhe (zishyizwe mu buryo burambuye), kandi itandukaniro rya mekanike ni rito cyane.ubwoko bw'ibicuruzwa bya koili byagaragayeIrimo ingano zombi z'ubugari kuva kuri mm 0.3 kugeza kuri mm 4.0, hamwe n'irangira ry'ubuso rya 2B, BA, No. 4, na HL. Ku bijyanye n'ubushyuhe bumwe mu buryo bwa cold-rolled coil:

316L ifite imbaraga nkeya mu gutanga umusaruro mu buryo bwo gufunga bitewe n'ingano nto ya karuboni, ariko itandukaniro ni rito cyane mu gutunganya coil. Ingano zombi zikora, zigapfundika, zigashyirwamo kashe, kandi zigasudira kimwe. Ihitamo rya mekanike hagati yazo ntabwo ari ryo riyobora - ibidukikije bya corruption ni byo bigena amahitamo. Ku bikoresho bisaba ingano yihariye y'ubushyuhe mu buryo bwa coil, 304 na 316L zombi ziboneka mu bushyuhe bumwe - zishyizwemo, 1/4H, 1/2H, na full hard - bivuye ku murongo wacu w'umusaruro. Umuguzi uhitamo hagati y'izo ngano zombi ashobora rero kugaragaza ubushyuhe bumwe kuri kimwe muri ibyo bikoresho nta kibazo cy'imiterere ya mekanike.

Amahame ngenderwaho mu nganda nkakugereranya 304 na 316 n'ibigo bikomeye bya serivisi z'ibyumaburi gihe bagaragaza umwanzuro umwe: iyo ikoreshwa rikubiyemo amazi y'umunyu, gutunganya imiti, cyangwa gushyira mu nkombe zo hanze, 316L ni yo ikwiye nubwo ikiguzi cyayo kiri hejuru mbere.

Isesengura ry'Itandukaniro ry'Ibiciro — Ese Premium ya 316L irakwiye?

Itandukaniro ry'igiciro hagati ya 304 na 316L cold-rolled cold-rolled cold cold cold cold cold cold constant ...

• 304 coil (2B, ikonje izungurutse):$2,800–3,200 kuri toni imwe
• Koili ya 316L (2B, ikonje cyane):$3,800–$4,400 kuri toni imwe
• Ibiciro by'ibanze:35–40% hejuru ya 304

Iyi kiguzi igomba gupimwa ugereranyije n'ikiguzi cyo gusimbuza ibikoresho bifitanye isano n'ingese. Dukurikije ibiganiro twagiranye n'abakiriya b'inganda zo mu mazi n'izikora imiti, uburyo busanzwe bwo gusimbuza ibikoresho bugizwe n'ingese burimo:

• Ikiguzi cy'ibikoresho:Igikoresho cyo gusimbuza ku giciro kiri ku isoko ubu (akenshi kiri hejuru ya 15–25% ugereranyije n'icyaguzwe mbere bitewe n'igihe cyo gutangira)
• Igiciro cyo gukora:Gukata, gutunganya, gusudira, no kurangiza ubuso bw'ibice bisimbura — ubusanzwe 50–100% by'ikiguzi cy'umwimerere cyo gukora
• Igihe cyo gushyiraho porogaramu kidakora:Ku miyoboro y'ibinyabutabire cyangwa ibice by'inyubako zo mu mazi, igihe cyo gukora nta giciro kinini mu gihe cyo gusimbuza ni cyo giciro kinini - akenshi igiciro cy'ibikoresho n'icyo gukora bihurira hamwe hagati ya 2-5×
• Ingaruka z'ingwate:Ingaruka mbi iyo ingese iteye kwangirika vuba mu gushyiramo kw'umukiriya

Ikiguzi cyoroshye cyo kubara ku gice cy’inyubako y’amazi: Toni 5 za 2.0 mm 304 coil zigura $15.000. Igihe cyitezwe cyo gukora mu nkombe: imyaka 4-6 mbere yo gukora imyobo igaragara bisaba gusimburwa. 316L coil ku ikoreshwa rimwe igura $21.000 (igiciro cya 40%). Igihe cyitezwe cyo gukora mbere yo gukora imyobo: imyaka 12-15. Mu gihe cy'imyaka 15, 304 isaba gusimburwa inshuro 2-3, byose hamwe bikaba $30.000–$45.000 mu mafaranga y'ibikoresho hamwe n'abakozi bo kuyishyiraho. 316L isaba kugura rimwe ku $21.000 kandi nta gusimburwa na rimwe. Ku myaka irenga 10 isabwa, 316L ihendutse cyane.

Uburyo bwo gufata ibyemezo: Igihe cyo kugena 304 vs 316L Coil

Umwanzuro

Guhitamo hagati ya 304 na 316L coil y'icyuma kidashonga yo gukoreshwa mu nganda zo mu mazi n'izikora imiti bigenwa n'ibintu bitatu: ingano ya chloride, ubushyuhe bwo gukora ugereranyije na CPT, n'igihe gisabwa cyo gukora. 304 irahagije mu bidukikije byo mu nzu, chloride nkeya, n'ubushyuhe buringaniye aho gusimbuza bishoboka mu myaka 5-8. 316L ni ngombwa ku ikoreshwa ryose rijyanye no gukurura amazi y'umunyu, chloride inyura hejuru ya 200 ppm ku bushyuhe buri hejuru, cyangwa igihe gisabwa cyo gukora kirenze imyaka 10 mu bidukikije byo ku nkombe. Igiciro cya 35-40% kuri 316L kigaruzwa mu gihe cyo gusimbuza cya mbere cyirinzwe.Ibyuma Bitaje muri Ningbo, dutanga amanota yombi yo gukurikirana neza urusyo, icyemezo cy’imiti n’imashini, hamwe n’amakuru ajyanye n’igeragezwa ry’ingufu iyo tubisabye. Ku bijyanye n’ibiciro bigezweho n’uko ububiko buboneka kuriIngufu za 304 na 316L z'icyuma kitagira umugese, hamagara itsinda ryacu rishinzwe kugurisha kugira ngo ubamenyeshe ubugari, ubunini, n'ibisabwa kugira ngo utunganye ubuso.

Ibibazo Bikunze Kubazwa

Ni irihe tandukaniro rikomeye riri hagati ya koyili ya 304 na 316L y'icyuma kitagira umugese?

316L irimo molybdenum iri hagati ya 2.0–3.0%, 304 idafite. Molybdenum irushaho kugira ubushobozi bwo kurwanya ingese n'ingufu mu bidukikije bya chloride. Ibi biha 316L PREN (Umubare uhwanye n'Ubudahangarwa bw'Ingufu) wa ~24–26 ugereranije na ~19 kuri 304.

Igura angahe 316L ugereranyije na 304?

Hagati mu mwaka wa 2026, coil ya 316L ifite igiciro cya 35–40% kirenga 304 ku isoko ry’ibicuruzwa byoherezwa mu mahanga mu Bushinwa. Itandukaniro nyaryo rihinduka bitewe n’ibiciro by’ibicuruzwa bya nickel na molybdenum. Ku bijyanye n’ingengo y’imari, teganya $3,800–$4,400 kuri toni imwe kuri 316L ugereranyije na $2,800–$3,200 kuri 304.

Ese 316L ishobora gusudira kimwe na 304?

Yego — imiterere yombi ni ibyuma bitagira umugese bifite ubushobozi bwo gusudira neza hakoreshejwe uburyo bwa TIG, MIG, cyangwa uburyo bwo gusudira burwanya. Ingano nto ya karuboni ya 316L (0.030% ntarengwa) irayiha akarusho: irwanya cyane ubwiyongere bw'ingufu (imvura ya karuboni ya chromium ku mbibi z'ingano) mu gace kagizweho ingaruka n'ubushyuhe mu gihe cyo gusudira, bivuze ko ikomeza kurwanya ingese nyuma yo gusudira idasaba gusudira nyuma yo gusudira.

Ese 316L ihora ari nziza kuruta 304 mu bikoreshwa mu mazi?

Yego, ku gice icyo ari cyo cyose cy’imiterere cyangwa gitwara imizigo gihuye neza n’amazi yo mu nyanja cyangwa imyuka yo mu mazi. 304 mu bidukikije byo mu mazi izatangira gucukurwa mu myaka 2-4 ku nkengero zaciwe n’ahantu ho gusudira. 316L yongera igihe cyo gutangira gucukurwa mu mazi kugeza ku myaka 8-12. Ku bijyanye no gushyiramo amazi hejuru y’ahantu ho gucukurwa (urugero, metero zirenga 50 uvuye ku nkengero), 304 ishobora kuba ihagije niba ubuso bushobora kubungabungwa no gusuzumwa buri gihe.

Ese irangi ry'ubuso rigira ingaruka ku kurwanya ingese kuri koyili ya 304 vs 316L?

Yego — ubuso bworoshye (2B, No. 4, cyangwa BA) butanga ubushobozi bwo kurwanya ingese kurusha ubuso bugoye (No. 1 bushyushye buzingirwa, cyangwa buhiye) kuko hari ahantu hake ho gutangiza imyanda. Ariko, itandukaniro riri hagati ya 304 na 316L riguma ari rimwe uko byagenda kose: 316L ku iherezo rya 2B iracyarusha 304 ku iherezo rya 2B ku rugero rumwe.

Ubushyuhe bw'ingenzi bwo gushyiramo amazi mu mwobo bwa 304 ugereranije na 316L ni ubuhe?

Mu gipimo cya NaCl cya 3.5% (gipima amazi yo mu nyanja), 304 ifite ubushyuhe bw’ibice by’ingenzi (CPT) bwa hafi 35°C, mu gihe 316L ifite CPT ya hafi 55°C. Ibi bivuze ko 316L ishobora gukoreshwa mu buryo bwizewe mu mazi yo mu nyanja ku bushyuhe bwa kugeza kuri 55°C mbere yuko ibice bitangira gukururwa mu buryo butunguranye, mu gihe 304 yamaze kwinjira mu gace k’ibice by ...

Ese nshobora gukoresha 304 coil mu gukoresha imiti mu bimera?

Yego — ariko gusa mu bidukikije bitarimo chloride. 304 ikoreshwa cyane mu miyoboro y’ibinyabutabire, imiyoboro y’amazi, n’ibice by’imiterere ya aside sulfurike (kugeza kuri 50%), aside nitrike, n’ibinyabutabire by’umwimerere. Ku miyoboro iyo ari yo yose irimo chloride — ndetse n’ingano nto iri hejuru ya 50 ppm — 316L ni yo ntarengwa.

Byanditswe na Bwana Chen — Umuyobozi wa Tekiniki muri Ningbo Stainless Steel Co., Ltd. Yibanda ku guhitamo ibikoresho by'ibyuma bitagira umugese, gukoresha ibikoresho bikonjesha, no gutanga ibikoresho mu nganda. Huza:Instagram | Facebook