TL;DR:Ndị na-azụ ahịa n'ime mmiri na kemịkalụ na-enweta ihe ha chọrọeriri igwe anaghị agba ncharaNa-eche mkpebi ugboro ugboro ihu: kwụọ ụgwọ 30–40% maka 316L ma ọ bụ nọrọ na 304. Akụkọ a na-atụnyere ọkwa abụọ ahụ site na iji mmiri nnu na-anọpụ iche (ASTM B117) na data nnwale nchara cyclic sitere na ụlọ nyocha anyị na Ningbo Stainless Steel, tinyere data nchara ubi sitere na nrụnye ụlọ ọrụ mmiri na kemịkalụ. Usoro mkpebi ahụ lekwasịrị anya na mgbanwe atọ: mkpokọta chloride, okpomọkụ ọrụ, na ndụ ọrụ achọrọ.

Ihe kpatara na enweghị ike ime mkpebi 304 vs 316L naanị na ọnụahịa

N'ọrụ m dịka Onye Nduzi Teknụzụ na Ningbo Stainless Steel, ana m enyocha nkọwapụta ihe maka ọtụtụ narịeriri igwe anaghị agba nchara oyi kpọchiri akpọchiiwu kwa afọ. Ajụjụ 304 megide 316L bụ mkparịta ụka teknụzụ kachasị m na ndị na-azụta ya. Onye njikwa ịzụta ihe maka onye na-emepụta ngwa mmiri gwara m otu ugboro, sị, "Anyị ejirila 304 eme ihe ruo afọ iri na ise. Ọ na-arụ ọrụ nke ọma - amaghị m ihe kpatara anyị ga-eji kwụọ ụgwọ ọzọ maka 316L." Ọnwa isii ka nke ahụ gasịrị, ụlọ ọrụ ya gbanwere otu ihe mejupụtara 304 nke e ji kọlụm mee na ọrụ desalination n'ụsọ oké osimiri n'ihi na corrosion pitting emeela oghere miri emi nke 0.3 mm mgbe ọrụ na-erughị afọ abụọ. Mgbanwe na 316L na-efu 40% karịa na mbụ mana egosighi na ọ dịghị olulu mmiri n'ime afọ atọ nke ọrụ.

Mkpebi dị n'etiti eriri igwe anaghị agba nchara 304 na 316L abụghị maka ọkwa "ka mma." Ọ bụ maka ijikọ profaịlụ iguzogide nchara nke ihe ahụ na gburugburu ọrụ - na ịghọta ogologo oge ịchọrọ ka nrụnye ahụ dịgide tupu nnọchi metụtara nchara amalite ịdị mkpa. Ntụnyere a na-enye isi ihe data ịchọrọ iji mee mkpebi ahụ na anya gị meghere.

Ihe mejupụtara kemịkalụ: ọdịiche Molybdenum

Isi ihe dị iche n'etiti 304 na 316L bụ na etinyere molybdenum 2.0–3.0% n'ime 316L. Molybdenum bụ ihe na-eme ka ferrite sie ike nke na-eme ka iguzogide nchara dịkwuo mma - ọkachasị nsị na mmebi oghere na gburugburu ebe nwere chloride.

Uru PREN bụ ihe na-ekewapụta otu ọnụọgụgụ. PREN nke 19 pụtara na 304 dabara adaba maka gburugburu ebe nwere oke chloride ruo ihe dị ka 200 ppm na okpomọkụ gburugburu. 316L nwere PREN nke 24–26 na-agbatị oke ahụ ruo ihe dị ka 1,000 ppm chlorides. Nọmba a na-ekpebi ebe enwere ike iji ọkwa ọ bụla na-enweghị nchara mpaghara ngwa ngwa.

Nnwale Nnu Na-anaghị Ese Anya (ASTM B117) — Ntụnyere Ụlọ Nyocha

Ụlọ nyocha anyị mere nnwale mmiri nnu nke awa 1,000 dịka ASTM B117 si dị na ihe nlele coil 304 na 316L oyi na-akpọgharị (2B emecha, ọkpụrụkpụ 1.0 mm). Paramita ule ahụ: 5% NaCl solution, okpomọkụ ụlọ 35°C, ịgbasa na-aga n'ihu. E nyochachara nsonaazụ ya na nkeji 100 nke awa.

N'ebe a na-agba nnu a na-achịkwa, 304 gosiri mmalite dị ukwuu nke ire ere mgbe awa 300 gachara, a na-atụkwa anya ya mgbe awa 750 gachara. 316L dịgidere ruo awa 1,000 naanị site n'itinye ntụpọ n'akụkụ - enweghị oghere n'elu dị larịị. "Oge mmalite olulu mmiri" maka 304 dị ihe dị ka awa 300 ma e jiri ya tụnyere awa 1,000 maka 316L - mmụba karịrị 3×.

Ọ dị mkpa ịmara na ASTM B117 nnu fesa bụ nnwale ntụnyere, ọ bụghị ihe na-egosi ndụ ọrụ. Ọnọdụ ndị a na-eme ngwa ngwa na-emepụta nsonaazụ ndị kwekọrọ na arụmọrụ ubi - mana ha anaghị akọwapụta ozugbo - na arụmọrụ ubi. Agbanyeghị, ọdịiche dị n'etiti akara abụọ ahụ bụ ihe a pụrụ ịtụkwasị obi na ntụziaka.

Nnwale Nrụgide Okirikiri — Na-eme ka Gburugburu Osimiri na Ụlọ Ọrụ Mmepụta Ihe Yiri

Iji gosipụta mkpughe nke ọma n'ụwa, anyị mere nnwale nchara okirikiri (ASTM G85-A5 agbanwere, okirikiri awa 24: mmiri nnu awa 2 + awa 22 95% RH na 35°C) ihe karịrị okirikiri 500 na ọkwa abụọ ahụ yana ọnọdụ dị nkọ nke na-eme ka akụkụ ndị a na-ahazi coils dị ka akụkụ. Nsonaazụ ya na-emetụta gburugburu ebe obibi mmiri na kemịkalụ:

• 304 eriri igwe:A malitere ịkụ ọkpọ na okirikiri 120, nke a na-etinye n'akụkụ ndị a kpụchara akpụcha. Ọkwa uto olulu ahụ bụ nkezi 0.008 mm kwa okirikiri n'etiti okirikiri 120-300, na-ebelata ruo 0.003 mm kwa okirikiri mgbe okirikiri 300 gasịrị (nke a na-egbochi site na polarization anodic). Mgbe okirikiri 500 gasịrị, omimi olulu kachasị bụ 0.28 mm, yana olulu 15-20 kwa 100 cm² gafere omimi 0.1 mm.
• 316L eriri igwe:Mmalite olulu mbụ na okirikiri 380 — nakwa na nsọtụ a kpụchara akpụcha mana ọ bụghị n'elu kọlụm dị larịị. Ọnụego uto olulu ahụ bụ nkezi 0.002 mm kwa okirikiri. Mgbe okirikiri 500 gasịrị, omimi olulu kachasị elu bụ 0.06 mm, yana obere olulu 3 kwa 100 cm² gafere omimi 0.05 mm.

Ihe akaebe nke nnwale okirikiri na-egosi na ọdịiche dị oke mkpa dị n'etiti 304 na 316L dị n'oge mmalite olulu mmiri. 316L na-egbu oge mmalite olulu mmiri site na ihe dị ka 3 × ma e jiri ya tụnyere 304. Maka nrụnye mmiri a na-atụ anya na ọ ga-adịru afọ 10, 304 ga-amalite igosi nchara na nsọtụ osisi n'ime afọ 2-3, ebe 316L ga-anọgide na-enweghị mmetụta ruo afọ 8-10 tupu obere olulu mmiri apụta ìhè.

Nchọpụta ndị a kwekọrọ na nnyocha e bipụtara n'ọhịa gbasara nchara ígwè anaghị agba nchara n'ime gburugburu ụlọ ọrụ mmepụta ihe na mmiri. Nnyocha onwe onye na-atụnyere 304 na 316L nke e kpughere n'ọnọdụ ụlọ ọrụ mmepụta ihe na mmiri na obodo mepere emepe na-egosi na 316L na-egosipụtaỌ ka mma iguzogide olulu mmiri n'ime gburugburu chloride n'ihi ọdịnaya molybdenum yaMaka ndị na-azụta ihe na-enweghị ike ịnwale nchara nke ha, ntụnyere ndị a e bipụtara site na ụlọ ọrụ ígwè na-enye ntọala ntụaka a pụrụ ịdabere na ya.

Ọzọkwa, mmetụta nke ọnụ ụzọ e ji kpụọ a hụrụ na nnwale anyị - ebe ọ na-amalitekarị na nsọtụ e ji kpụọ agbụ ma ọ bụ nke e ji kpụọ agbụ - nwere mmetụta bara uru dị ukwuu nye ndị na-azụta eriri. Kọlụ nke a gbawara agbawa n'obosara n'ebe onye na-ekesa ya na-emepụta nsọtụ ọhụrụ e ji kpụọ agbụ n'akụkụ abụọ nke eriri ọ bụla. Akụkụ ndị a enweghị ihe mkpuchi chromium oxide passive nke dị n'elu eriri e ji kpụọ agbụ ma ya mere na-anọchite anya ebe kachasị adịghị ike na yinye nchara. Mgbe m na-akọwapụta eriri maka ojiji mmiri ma ọ bụ kemịkalụ, ana m akwado ịrịọ maka ọnọdụ igwe (ebe o kwere mee) ma ọ bụ ịkọwapụta ọgwụgwọ passivation n'akụkụ - nitric acid ma ọ bụ citric acid passivation dịka ASTM A967 si kwuo - dị ka usoro mgbe a kpụchara agbụ.

Ike Ịtụnye Ihe — Nha Elektrọnik

Ụlọ nyocha anyị mere nyocha potentiodynamic polarization (ASTM G61) na ọkwa abụọ ahụ na mmiri NaCl 3.5% (ihe dị ka nnu mmiri oké osimiri) na 25°C na 50°C. Ike pitting (Epit) bụ voltaji nke ihe nkiri na-adịghị arụ ọrụ na-agbaji ma na-eto eto olulu siri ike - ụkpụrụ dị elu na-egosi iguzogide ka mma.

Okpomọkụ dị mkpa maka pitting (CPT) bụ ihe dị mkpa: n'okpuru okpomọkụ a, ihe nkiri ahụ na-adịgide adịgide ọbụlagodi na gburugburu chloride. N'elu ya, pitting na-amalite ozugbo. 304 nwere CPT nke ihe dị ka 35°C na mmiri oké osimiri - nke pụtara na ọ nọ n'ihe ize ndụ na ngwa mmiri ọ bụla ebe elu ihe ahụ karịrị 35°C (dịka ọmụmaatụ, anyanwụ kpọmkwem n'ụsọ oké osimiri na ngalaba coil dị gịrịgịrị). 316L nwere CPT nke 55°C na-ekpuchi ihe fọrọ nke nta ka ọ bụrụ ngwa mmiri niile dị gburugburu-okpomọkụ na-enweghị ihe egwu pitting.

Njirimara Mekaniki — Ike nrụgide na nhazi

Ma 304 na 316L dị n'otu ọkwa okpomọkụ (a na-akpọnwụ ya site na ike zuru oke), ọdịiche dị n'etiti igwe dịkwa obere.ngwaahịa eriri igwe dị iche ichegụnyere ọkwa abụọ ahụ n'ọkpụrụkpụ site na 0.3 mm ruo 4.0 mm, yana 2B, BA, Nke 4, na HL dị. Maka ụdị okpomọkụ yiri ya n'ụdị coil a na-akpọ "coil" oyi:

316L nwere ike mmepụta dị ntakịrị ala n'ọnọdụ annealed n'ihi obere ọdịnaya carbon, mana ọdịiche ahụ adịghị oke na nhazi coil bara uru. Akara abụọ ahụ na-etolite, gbagọrọ agbagọ, stampụ, na ịgbado ọkụ n'otu aka ahụ. Mkpebi igwe dị n'etiti ha abụghị ihe na-akpali - gburugburu ebe obibi na-emebi emebi na-ekpebi nhọrọ ahụ. Maka ngwa ndị chọrọ ọkwa okpomọkụ kpọmkwem n'ụdị coil, ma 304 na 316L dị na otu okpomọkụ - annealed, 1/4H, 1/2H, na full hard - site na ahịrị mmepụta anyị. Ya mere, onye zụrụ ihe na-ahọrọ n'etiti akara abụọ ahụ nwere ike ịkọwapụta otu okpomọkụ ahụ maka ihe ọ bụla na-enweghị nsogbu ihe onwunwe igwe.

Ụkpụrụ ụlọ ọrụ dịkaNtụnyere 304 vs 316 site na ebe ọrụ ígwè dị mkpana-egosipụta otu nkwubi okwu ahụ mgbe niile: mgbe ojiji ya gụnyere mmiri nnu, nhazi kemịkalụ, ma ọ bụ ikpughe n'akụkụ osimiri n'èzí, 316L bụ nkọwapụta kwesịrị ekwesị n'agbanyeghị ọnụ ahịa ya dị elu karịa.

Nyocha nke Ọdịiche Ọnụ Ahịa - 316L Premium ọ bara uru?

Ọdịiche dị n'etiti eriri oyi 304 na 316L na-agbanwe agbanwe na ọnụahịa nickel na molybdenum. Dịka ọ dị n'etiti afọ 2026, dabere na ọnụahịa FOB Ningbo maka Grade 304 na 316L na njedebe 2B, ọkpụrụkpụ 1.0–3.0 mm, na obosara eriri ọkọlọtọ:

• 304 coil (2B, oyi na-akpọgharị):$2,800–$3,200 kwa tọn metric
• 316L coil (2B, oyi na-akpọgharị):$3,800–$4,400 kwa tọn metric
• adịchaghị mma:35–40% karịa 304

A ga-enyocha ego a site na ọnụ ahịa nnọchi nke metụtara nchara. Dabere na mkparịta ụka anyị na ndị ahịa mmiri na ụlọ ọrụ kemịkalụ, usoro nnọchi nke nchara na-akpata gụnyere:

• Ọnụ ego ihe:Ndochi mkpuchi na ọnụahịa ahịa ugbu a (ọtụtụ mgbe ọ na-adịkarị 15-25% karịa ihe ịzụrụ mbụ n'ihi akara oge ndu)
• Ọnụ ego nrụpụta:Ịcha, ịkpụ, ịgbado ọkụ, na imecha elu nke akụkụ ndị nnọchi - nke na-abụkarị 50–100% nke ọnụ ahịa mmepụta mbụ
• Oge nkwụsị nrụnye:Maka paịpụ kemịkalụ ma ọ bụ ihe owuwu mmiri, oge ọrụ mmepụta n'oge nnọchi bụ ihe kachasị ọnụ ahịa - ọtụtụ mgbe 2-5× ọnụ ahịa ihe na mmepụta jikọtara ọnụ
• Ihe egwu akwụkwọ ikike:Ibu ọrụ agbatịkwuru ma ọ bụrụ na ire ere kpatara mmebi tupu oge eruo na nrụnye onye ahịa

Ngụkọta ọnụ ahịa ndụ dị mfe maka akụkụ ihe owuwu mmiri: tọn ise nke eriri 2.0 mm 304 na-efu $15,000. Ndụ ọrụ a tụrụ anya ya na gburugburu ebe dị n'ụsọ oké osimiri: afọ 4-6 tupu olulu a na-ahụ anya chọrọ nnọchi. eriri 316L maka otu ngwa ahụ na-efu $21,000 (40% adịchaghị mma). Ndụ ọrụ a tụrụ anya ya tupu olulu: afọ 12-15. N'ime afọ 15, nhọrọ 304 chọrọ nnọchi 2-3, ngụkọta ọnụ ahịa ihe onwunwe $30,000–$45,000 yana ọrụ nrụnye. Nhọrọ 316L chọrọ otu ịzụrụ na $21,000 na enweghị nnọchi. Na mkpa ọrụ afọ 10+, 316L dị ọnụ ala karịa nke a na-apụghị ịgbagha agbagha.

Usoro Mkpebi: Mgbe a ga-akọwapụta 304 vs 316L Coil

Mmechi

A na-akọwa nhọrọ dị n'etiti eriri igwe anaghị agba nchara 304 na 316L maka ngwa mmiri na kemịkal site na mgbanwe atọ: mkpokọta chloride, okpomọkụ ọrụ metụtara CPT, na ndụ ọrụ achọrọ. 304 zuru oke maka gburugburu ime ụlọ, obere chloride, na okpomọkụ dị oke ala ebe enwere ike ịgbanwe ya n'ime afọ 5-8. 316L dị mkpa maka ngwa ọ bụla metụtara ikpughe mmiri nnu kpọmkwem, usoro chloride na-asọfe karịa 200 ppm na okpomọkụ dị elu, ma ọ bụ ihe achọrọ maka ndụ ọrụ gafere afọ 10 na gburugburu mmiri. A na-enweta ego ọnụego nke 35-40% maka 316L na usoro nnọchi mbụ a zere.Ningbo Igwe anaghị agba nchara, anyị na-enye ọkwa abụọ ahụ ihe niile a pụrụ iji chọpụta ihe dị n'ime igwe, asambodo kemịkalụ na nke mekaniki, yana data nnwale nchara mgbe a rịọrọ ya. Maka ọnụahịa dị ugbu a na ngwaahịa dị na304 na 316L igwe anaghị agba nchara, kpọtụrụ ndị otu ahịa anyị maka ihe ịchọrọ imecha obosara, ọkpụrụkpụ, na elu.

Ajụjụ Ndị A Na-ajụkarị

Kedu ihe dị iche n'etiti eriri igwe anaghị agba nchara 304 na 316L?

316L nwere 2.0–3.0% molybdenum, nke 304 enweghị. Molybdenum na-eme ka iguzogide olulu na ire ere dị n'akụkụ chloride dịkwuo mma nke ukwuu. Nke a na-enye 316L PREN (Nọmba Nguzogide Pitting Equivalent) nke ~24–26 ma e jiri ya tụnyere ~19 maka 304.

Ego ole ka 316L na-eri ma e jiri ya tụnyere 304?

Dịka ọ dị n'etiti afọ 2026, igwe 316L oyi na-akpọ 316L nwere prioritim 35–40% karịa 304 n'ahịa mbupụ China. Ọdịiche kpọmkwem na-agbanwe agbanwe na ọnụahịa ngwa ahịa nickel na molybdenum. Maka ebumnuche mmefu ego, tụọ anya $3,800–$4,400 kwa tọn metric maka 316L megide $2,800–$3,200 maka 304.

Enwere ike ịgbado 316L n'otu ụzọ ahụ e si agbado 304?

Ee — akara abụọ a bụ ígwè anaghị agba nchara austenitic nwere ezigbo ike ịgbado ọkụ site na iji usoro TIG, MIG, ma ọ bụ usoro ịgbado ọkụ na-eguzogide. Ọdịnaya carbon dị ala nke 316L (0.030% kachasị) na-enye ya uru: ọ na-eguzogide mmetụta uche karịa (mmiri chromium carbide na ókèala ọka) na mpaghara okpomọkụ metụtara n'oge ịgbado ọkụ, nke pụtara na ọ na-ejigide iguzogide nchara mgbe ịgbado ọkụ na-achọghị ka a gbazee mmiri mgbe a gbanyere ya.

316L ọ ka mma karịa 304 maka iji mmiri eme ihe mgbe niile?

Ee, maka ihe owuwu ma ọ bụ ihe ọ bụla na-ebu ibu nke metụtara mmiri oké osimiri ma ọ bụ ihe na-efesa mmiri. 304 n'ime gburugburu mmiri ga-amalite ịwụsa n'ime afọ 2-4 na nsọtụ e bepụrụ na mpaghara ịgbado ọkụ. 316L na-agbatị mmalite olulu mmiri ruo afọ 8-12. Maka ngwa ndị dị n'elu mpaghara ịgbado ọkụ (dịka ọmụmaatụ, mita 50+ n'ime ime obodo site na ụsọ oké osimiri), 304 nwere ike ịdị mma ma ọ bụrụ na enwere ike idobe ma nyochaa elu ahụ mgbe niile.

Mmecha elu ọ na-emetụta nguzogide nchara nke eriri 304 vs 316L?

Ee — mmecha elu dị nro (2B, Nke 4, ma ọ bụ BA) na-enye nguzogide nchara ka mma karịa elu siri ike (Nke 1 a na-akpọ ọkụ, ma ọ bụ nke a pịrị apị) n'ihi na enwere obere ebe nukliation maka mmalite olulu. Agbanyeghị, ọdịiche dị n'etiti 304 na 316L ka dị otu ahụ n'agbanyeghị mmecha: 316L na mmecha 2B ka na-aka mma 304 na mmecha 2B site n'otu oke.

Kedu ihe bụ okpomọkụ dị mkpa nke 304 vs 316L?

N'ime ihe ngwọta NaCl nke 3.5% (na-eme ka mmiri mmiri dị n'oké osimiri yie), 304 nwere okpomọkụ dị mkpa (CPT) nke ihe dị ka 35°C, ebe 316L nwere CPT nke ihe dị ka 55°C. Nke a pụtara na enwere ike iji 316L mee ihe n'enweghị nsogbu na mmiri oké osimiri na okpomọkụ ruru 55°C tupu olulu ahụ amalite ozugbo, ebe 304 abanyelarị na mpaghara ihe egwu olulu karịa 35°C.

Enwere m ike iji 304 coil maka ngwa kemịkalụ osisi?

Ee — mana naanị n'ebe na-abụghị chloride. A na-eji 304 eme ihe nke ọma na paịpụ osisi kemịkalụ, arịa, na ihe ndị mejupụtara ya maka sulfuric acid (ruo 50%), nitric acid, na kemịkalụ organic. Maka usoro ọ bụla nwere chlorides — ọbụlagodi ọnụọgụ ihe karịrị 50 ppm — 316L bụ nkọwapụta kacha nta.

Maazị Chen dere ya — Onye isi teknụzụ na Ningbo Stainless Steel Co., Ltd. Ọ bụ ọkachamara na nhọrọ ihe igwe anaghị agba nchara, ngwa mpịakọta oyi, na ngwọta ọkọnọ ụlọ ọrụ mmepụta ihe. Jikọọ:Instagram | Facebook