Nchịkọta: Ntụle bara uru nke Stelite 6 na Stelite 21, na-akọwa otú ọdịnaya carbon na tungsten-versus-molybdenum si achụpụ ike na ike siri ike ahia.
Stelite 6 na Stelite 21 bụ ihe abụọ cobalt na-eyi alloys na-ejikarị tụnyere ibe ha. Ihe ndabara na-emekarị bụ ịkọwa Stelite 6 mgbe ọ bụla ejighị n'aka. Omume ahụ nwere ihe ndabere ezi uche dị na ya: Stelite 6 nwere ogologo akụkọ ngwa ngwa, omume edekọtara nke ọma, yana ahụmịhe nhazi tozuru oke. Ma n'ọnọdụ abụọ ndabara nwere ike iwebata ihe ize ndụ na-enweghị isi: mgbe akụkụ ahụ na-ahụ ịgba ígwè ọkụ ọkụ ngwa ngwa ma ọ bụ ujo ọkụ, na mgbe akụkụ ahụ nwere mgbidi dị mkpa ma ọ bụ akụkụ mberede gbanwere.
Stelite 21 dị nke ukwuu iji lebara mmachi siri ike nke Stelite 6 n'ọnọdụ ndị ahụ. Ịghọta ahịa dị n'etiti ha abụọ bara uru karịa iburu nke "ka mma" n'isi.
Ọdịiche nke ihe mejupụtara na-ebute nkewa arụmọrụ
Ọdịiche arụmọrụ n'etiti alloys ndị a na-agbadata na nhọrọ nhazi abụọ.
Ọdịnaya carbon. Stelite 6 na-ebu ọkwa carbon dị elu nke ukwuu. N'okpuru SAE AMS 5387, ihe nkedo Stelite 6 nwere nhazi aha nke 60Co-29Cr-4.5W, yana carbon na-adịkarị na 0.9-1.4% maka ngwaahịa nkedo. Carbon karịa pụtara ọdịda carbide siri ike karị, nke na-ebuli ike ozugbo na iyi nguzogide. Stellite 21 nwere obere carbon dị ala, ya na ntinye aha nke roughly C ~ 0.25%, Cr 25-30%, Mo 4.5-6.5%, Ni 1.5-3.5%, itule Co. Lower carbon pụtara obere carbide olu ntakiri na a microstructure adịkwaghị na cobalt siri ike-solution matrix.
Tungsten megide molybdenum. Stelite 6 na-eji tungsten (W) dị ka isi ihe na-eme ka ihe ngwọta siri ike; Stelite 21 na-eji molybdenum (Mo) dochie ọtụtụ n'ime tungsten ahụ. Molybdenum nwere ihe dị ka ọkara atọm arọ nke tungsten, yabụ n'otu nha nha, ọ na-atụnye ihe dị ka okpukpu abụọ okpukpu abụọ. Molybdenum nwekwara njikọ siri ike maka carbon ma na-akwalite nhazi nke carbide. Na Stelite 21, agbanyeghị, ọkwa carbon dị ala na-egbochi mmetụta ahụ, yana nsonaazụ net bụ mkpokọta carbide dị ala karịa Stelite 6.
Ọnụ, ndịiche abụọ a na-emepụta profaịlụ arụmọrụ abụọ dị iche iche.
Stelite 6: njupụta carbide na mgbanwe maka nguzogide eyi
Microstructure nke Stellite 6 nwere matriks ngwọta siri ike dabere na cobalt nke nwere oke nkesa nke ihe irighiri carbide siri ike. Ihe owuwu a na-arụ ọrụ nke ọma n'okpuru akwa abrasive.
Ebe ọ dabara. Ihu mkpuchi valvụ, ogwe aka mgbapụta, ihe ndị na-ejizi slurry, na akụkụ uwe izugbe n'okpuru mmetụta na-agafeghị oke bụ ngwa Stelite 6. Isi ike ya na-adabakarị na oke Rockwell C 37-45, dabere na ọnọdụ nkedo na ọgwụgwọ okpomọkụ na-esote, nke zuru oke maka ọtụtụ nsogbu na-eyi abrasive. Na oxidizing gburugburu okpomọkụ dị elu, Stelite 6 na-etolitekwa oyi akwa oxide nke dabere na Cr₂O₃ na CoCr₂O₄, yana ọnụego oxidation dị ala karịa Stelite 21.
Ebe oke na-egosi. Njupụta nke carbide nwere mmetụta dị n'akụkụ: n'okpuru ịgba ígwè ọkụ ọkụ ngwa ngwa ma ọ bụ na-ekpo ọkụ na-ekpo ọkụ na mpaghara, ọdịiche mgbasawanye okpomọkụ dị n'etiti carbide na matrix nwere ike ịghọ ebe mmalite mgbawa. Maka akụkụ ndị dị mkpa, carbon carbon na carbide dị elu nwekwara ike iwelite ohere nke mgbawa n'oge nkedo na igwe. Nke a apụtaghị na Stelite 6 enweghị ike iji ya mee ihe n'ọnọdụ ndị a, mana mgbe ike ọgwụgwụ okpomọkụ bụ ọnọdụ ọdịda kachasị, a ga-enyocha ihe ọzọ nke ọma.
Stelite 21: ọdịnaya carbide dị ala maka mgbanwe ike na ike ọgwụgwụ ọkụ
Stelite 21 na-agbaso mgbagha imewe dị iche. Ọdịnaya carbon ya dị ala na mgbakwunye molybdenum na-ebelata nke ọma obere akụkụ nke carbide, na-ahapụ matrix cobalt siri ike dị ka akụkụ nke na-arụ ọrụ igwe.
Ihe si na ya pụta ozugbo: Isi ike nke ụlọ na okpomọkụ dị ọcha dị ala karịa Stelite 6, mana ike siri ike, nkwụsi ike ọkụ, na nguzogide ike ọgwụgwụ ka mma. A na-akọkarị ike nkedo dịka ihe nkedo na HRC 30s dị ala ruo etiti, n'okpuru nke Stelite 6 (ụkpụrụ ziri ezi na-adabere n'ụdị ngwaahịa na ọnọdụ nnwale - nyochaa megide data ndị na-ebubata ya tupu ịkọwapụta). Uru ya abụghị ihe abrasives na-eyi kama ọ na-edobe iguzosi ike n'ezi ihe n'okpuru ịgba ígwè ọkụ.
Ebe ọ dabara. A na-eji Stellite 21 mee ihe na ikuku turbine gas, valvụ na-arụ ọrụ na-ekpo ọkụ, ihe nkwụnye ọkụ dị elu, na ihe mkpuchi weld nke kwesịrị igbochi mgbasawanye ọkụ ọkụ. Ebe Stelite 6 na-eje ozi dị ka oyi akwa dị n'elu yana achọrọ ihe mkpuchi etiti, Stelite 21 ejirila akụkọ ihe mere eme mee ihe dị ka ihe nchekwa iji mee ka ọdịiche mgbasawanye ọkụ dị n'etiti mkpụrụ nchara na oyi akwa Stelite 6. Nnyocha e mere na mpempe ígwè F91 na Stellite 21 buffer layers, nke dị na 550-650 ° C ruo awa 8,760, chọpụtara mmetụta siri ike siri ike na F91/S21 interface, nke mere na-eji nickel buffer Layer na-ahọrọ na ngwa ahụ kpọmkwem. Nke a na-egosipụta ọnọdụ alloy nke ọma: uru ya dabere na ike n'okpuru ọnọdụ ụfọdụ, ọ bụghị iji dochie Stelite 6 ebe niile.
Mmachi eleghara anya dị mfe. Stelite 21 nwere oke nguzogide nbibi siri ike. N'ihi na njupụta carbide dị ala, matriks ahụ na-enye obere nchebe mgbe ụmụ irighiri ihe dị nkọ na-akụ ọsọ. N'okpuru mmebi akụkụ dị ala na akwa abrasive siri ike, Stelite 21 anaghị abụkarị nhọrọ kacha mma.
Ụzọ nhọrọ bara uru
Ụzọ na-esonụ dabeere na njirimara arụmọrụ nke alloys abụọ ahụ. Ọ nwere ike ịbụ ntuziaka nyocha mbụ mana o kwesịghị dochie nyocha injinia nke ngwa ahụ akọwapụtara.
Dabere na Stelite 6 mgbe:
- Ụdị ọdịda nke kachasị bụ ihe abrasive ma ọ bụ nrapado, na ịgba ígwè ọkụ abụghị nnukwu ibu.
- Akụkụ ahụ nwere akụkụ buru ibu, yana enwere ike ijikwa mgbawa n'oge nkedo na igwe.
- Okpomọkụ ọrụ dị elu na ikuku oxidizing, na oyi akwa oxide na-echebe bụ akụkụ nke imewe.
- Ngwa a nwere akụkọ ihe mere eme Stelite 6 nke nwere data ọdịda na-ezo aka.
Dabere na Stelite 21 mgbe:
- Akụkụ ahụ na-enweta ọkụ ọkụ na oyi na-ekpo ọkụ ugboro ugboro, na ike ọgwụgwụ okpomọkụ bụ ihe egwu ama ama.
- Akụkụ ahụ nwere mgbidi dị mkpa ma ọ bụ akụkụ mberede na-agbanwe, na isi ike dị mkpa karịa isi ike.
- A chọrọ oyi akwa ntughari n'etiti mkpụrụ nchara na ihe siri ike chere ihu iji chekwaa ndakọrịta mgbasawanye okpomọkụ (mana a ga-enyocha nkwụsi ike ogologo oge dị elu).
- Usoro eyi bụ tumadi nchara-na-metal sliding wear ma ọ bụ cavitation kama ịhịa aka n'ahụ.
Mgbe nke ọ bụla n'ime ha adịghị mma: Ọ bụrụ na ngwa na-achọ ma elu abrasive eyi nguzogide na magburu onwe ike ike ọgwụgwụ nke okpomọkụ, Stellite 12 (elu carbon, elu eyi na-eguzogide) ma ọ bụ Tribaloy ezinụlọ nke intermetallic-ike alloys nwere ike kwesịrị ịtụle, ma ọ bụ akụkụ nke thermal management nwere ike mkpa ka a gwa ya na nhazi ọkwa. Ntuziaka ndị a gafere ntule a mana ọ bụ na nyocha nhọrọ ihe mmalite.
Ihe ị ga-etinye na RFQ
Nke ọ bụla alloy ahọpụtara, onye na-ebubata ihe nkedo na igwe na-achọkarị ihe ndị a tupu o nwee ike ịnye nturuugo bara uru:
- Ihe osise akụkụ na isi akụkụ na ndidi chọrọ.
- Ọnọdụ ọrụ: oke okpomọkụ, ọkara, na ụdị ibu (eyi, mmetụta, ịgba ígwè ọkụ).
- Ndụ tụrụ anya ma ọ bụ ọnọdụ ọdịda amaara, na akụkụ akụkọ ihe mere eme ma ọ bụrụ na ọ dị.
- Ụkpụrụ ihe, dịka ọmụmaatụ ma AMS 5387 ma ọ bụ nkọwapụta ọzọ dabara adaba ga-emezurịrị.
- Ọnụọgụ, ebe ọ bụ na otu iberibe, obere batches, na mmepụta mpịakọta na-eduga na nhọrọ usoro dị iche iche.
Maka ihe nkedo alloy dabere na cobalt, ọ dịkwa mma ịkwado ma onye na-ebubata ya nwere ikike ime ụlọ site na nkedo site na ịmecha machining, n'ihi na alloys ndị a na-arụ ọrụ nke ọma na nkwụsị n'etiti usoro na-emetụta ma ọnụ ahịa yana oge ndu.
