Ihe dị mma 254SMO na-enwekarị uru ọkọlọtọ zuru oke na ihe mejupụtara kemịkalụ ya, akụrụngwa ọ bụla nwere ọrụ nke ya:
Nickel (Ni): Nickel nwere ike ịbawanye ike nke ígwè 254SMO ka ọ na-ejigide plasticity na ike siri ike. Nickel nwere nnukwu nguzogide corrosion na acid na alkalis, ma nwee nchara na ikpo ọkụ na oke okpomọkụ.
Molybdenum (Mo): Molybdenum nwere ike nụchaa ọka nke ígwè 254SMO, mee ka ike ike na ike ọkụ dịkwuo mma, ma nọgide na-enwe ike zuru oke na nguzogide na-ekpo ọkụ na okpomọkụ dị elu (nrụgide ogologo oge na okpomọkụ dị elu, nrụrụ, mgbanwe na-akpụ akpụ).
Titanium (Ti): Titanium bụ deoxidizer siri ike na ígwè 254SMO. Ọ nwere ike ime ka usoro dị n'ime ya dị nchara, nụchaa ike ọka; belata ịka nká uche na oyi brittleness. Melite arụmọrụ ịgbado ọkụ. Mgbakwunye titanium kwesịrị ekwesị na chromium 18 nickel 9 austenitic igwe anaghị agba nchara na-egbochi corrosion intergranular.
Chromium (Cr): Chromium nwere ike imeziwanye nguzogide corrosion nke ígwè na ya mere ọ bụ ihe dị mkpa alloying element nke 254SMO igwe anaghị agba nchara na okpomọkụ na-eguzogide ọgwụ.
Ọla kọpa (Cu): Ọla kọpa nwere ike ịbawanye ike na ike, ọkachasị na corrosion ikuku. Mwepu bụ na ọkụ na-ekpo ọkụ na-emekarị n'oge ọrụ ọkụ na plasticity nke ọla kọpa gafere 0,5%. Mgbe ọdịnaya ọla kọpa na-erughị 0.50%, ọ dịghị mmetụta ọ bụla na-eme ka ihe dị na 254SMO na-eme ihe.
Dabere na ọdịiche dị na isi ihe ndị dị n'elu, enwere ike iji ụdị nickel 254SMO ndị a:
1. Nickel-copper (Ni-Cu) alloy, nke a makwaara dị ka Monel alloy (Monel alloy)
2. Nickel-chromium (Ni-Cr) alloy bụ ihe nickel dabeere na okpomọkụ na-eguzogide alloy.
3. Ni-Mo alloy tumadi na-ezo aka Hastelloy B usoro
4. Ni-Cr-Mo alloy tumadi na-ezo aka Hastelloy C usoro
A na-eji 254SMO n'ime akụrụngwa ụlọ ọrụ dị iche iche, n'ime ya nke isi iyi akwụkwọ, isi iyi, akụkụ mkpuchi, ihe mkpuchi ụgbọ ala, ihe ntụgharị catalytic, ndị na-ekpo ọkụ EGR, turbochargers na gaskets ndị ọzọ na-ekpo ọkụ, ụgbọ elu Austenitic igwe anaghị agba nchara na-eji maka akụkụ nkwonkwo.
Karịsịa, a akụkụ nke ngwa dị iche iche ulo oru equipments, ụgbọala iyuzucha gaskets, wdg eji n'okpuru elu okpomọkụ na-eji NPF625 na NCF718 kpọmkwem na JIS G 4902 (corrosion-eguzogide na okpomọkụ na-eguzogide superalloy efere) na-ebu uka percentages. Ọ karịrị 50% nke ihe dị oké ọnụ ahịa nke Ni. N'aka nke ọzọ, maka ihe ndị dị ka mmiri ozuzo na-eme ka igwe anaghị agba nchara dị ka SUH660 nke na-eji ogige intermetallic nke Ti na Al kpọmkwem na JIS G 4312 (okpomọkụ na-eguzogide ígwè), ike nke 254 SMO na-ebelata nke ukwuu mgbe ejiri ya ogologo oge. oge na okpomọkụ dị elu, na naanị Ojiji ahụ ruo ihe dị ka 500 ° C adịghị emeju àgwà ndị a chọrọ maka gaskets na-eguzogide okpomọkụ nke na-akwalite site na okpomọkụ dị elu n'afọ ndị na-adịbeghị anya.
Aha: 254SMO
Ụkpụrụ mba: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Ndị mmekọ: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Germany, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Sweden Japan Metallurgical, Nippon Steel na ụdị ndị ọzọ a ma ama.
Akara America: UNS S31254
Nyochaa nke 254SMo (S31254): Igwe anaghị agba nchara austenitic. N'ihi ọdịnaya molybdenum dị elu, ọ nwere oke nguzogide na pitting na crevice corrosion. 254SMo igwe anaghị agba nchara ka emepụtara wee mepụta maka ojiji na gburugburu nwere halide dị ka mmiri oké osimiri.
254SMo (S31254) Super igwe anaghị agba nchara bụ ụdị pụrụ iche nke igwe anaghị agba nchara. Ọ dị iche na igwe anaghị agba nchara nkịtị n'ihe gbasara kemịkalụ. Ọ na-ezo aka na igwe anaghị agba nchara dị elu nwere nnukwu nickel, chromium dị elu, na molybdenum dị elu. Super igwe anaghị agba nchara, nickel dabeere alloy bụ a pụrụ iche ụdị igwe anaghị agba nchara, mbụ chemical mejupụtara dị iche na nkịtị igwe anaghị agba nchara, na-ezo aka a elu alloy nwere nnukwu nickel, elu chromium, elu-molybdenum igwe anaghị agba nchara. Nke ka mma bụ 254Mo, nke nwere 6% Mo. Ụdị ígwè a nwere ezigbo nguzogide corrosion mpaghara. Ọ nwere ezigbo nguzogide corrosion n'okpuru mmiri mmiri, ikuku ikuku, oghere, na ọnọdụ nkwụsị nke dị ala (PI ≥ 40) na nrụgide corrosion ka mma, ihe ndị ọzọ maka ihe ndị dabeere na Ni-based alloys na alloys titanium. Nke abụọ, na elu okpomọkụ ma ọ bụ corrosion eguzogide arụmọrụ, nwere mma iguzogide elu okpomọkụ ma ọ bụ corrosion eguzogide, bụ 304 igwe anaghị agba nchara enweghị ike dochie. Na mgbakwunye, site na nhazi nke igwe anaghị agba nchara, ihe owuwu igwe anaghị agba nchara pụrụ iche bụ ihe owuwu austenite metallographic kwụsiri ike. N'ihi na igwe anaghị agba nchara pụrụ iche bụ ụdị ihe dị elu, ọ dị nnọọ mgbagwoju anya na usoro mmepụta ihe. N'ozuzu, ndị mmadụ nwere ike ịdabere naanị na usoro ọdịnala iji rụpụta igwe anaghị agba nchara pụrụ iche, dị ka ịwụsa, ịkwa akwa, ịgbagharị na ihe ndị ọzọ.
N'otu oge ahụ ọ nwere njirimara nke nguzogide okpomọkụ dị elu dị ka ndị a:
1. Ọnụ ọgụgụ dị ukwuu nke nyocha nke ubi na ahụmahụ dị ukwuu na-egosi na ọbụna na okpomọkụ dị elu dị elu, 254SMO nwere nnukwu nguzogide corrosion na mmiri mmiri, na naanị ụdị igwe anaghị agba nchara nwere ihe a.
2. Nguzogide corrosion nke 254SMO na ngwọta acidic na ngwọta oxidizing halide dị ka ndị a chọrọ maka mmepụta ịcha ọcha nke akwụkwọ nwere ike iji tụnyere nickel-base alloys na titanium alloys nke na-eguzogide ọgwụ na corrosion.
Oge nzipu: Eprel-24-2018