Ịkwanye Superalloys

Ịkwanye Superalloys

(1) A pụrụ ikewapụta njirimara brazing superalloys n'ime ụdị atọ: ntọala nickel, ntọala ígwè na ntọala cobalt. Ha nwere ezigbo ihe onwunwe mekaniki, iguzogide oxidation na iguzogide corrosion n'oge okpomọkụ dị elu. Alloy ntọala nickel bụ nke a na-ejikarị eme ihe n'ihe gbasara mmepụta ihe bara uru.

Superalloy ahụ nwere ọtụtụ Cr, ihe nkiri oxide Cr2O3 nke siri ike iwepụ na-etolite n'elu mgbe a na-ekpo ọkụ. Superalloys nke nickel base nwere Al na Ti, nke dị mfe oxidize mgbe a na-ekpo ọkụ. Ya mere, iji gbochie ma ọ bụ belata oxidation nke superalloys n'oge a na-ekpo ọkụ na iwepụ ihe nkiri oxide bụ nsogbu mbụ n'oge a na-eme brazing. Ebe ọ bụ na borax ma ọ bụ boric acid dị na flux nwere ike ibute ire ere nke metal base na okpomọkụ brazing, boron a na-akpọlite ​​​​mgbe mmeghachi omume ahụ gasịrị nwere ike ịbanye n'ime metal base, na-ebute ntinye n'etiti granular. Maka alloys base nickel a kpụrụ akpụ nwere nnukwu ọdịnaya Al na Ti, ogo vacuum na ọnọdụ ọkụ agaghị adị ala karịa 10-2 ~ 10-3pa n'oge brazing iji zere oxidation na elu alloy n'oge a na-ekpo ọkụ.

Maka ngwakọta ntọala nickel siri ike ma mee ka mmiri zoo, okpomọkụ brazing kwesịrị ịdị ka okpomọkụ okpomọkụ nke ọgwụgwọ ngwọta iji hụ na ihe mejupụtara alloy ahụ gbazee kpamkpam. Okpomọkụ brazing dị oke ala, enweghịkwa ike ịgbaze ihe mejupụtara alloy ahụ kpamkpam; Ọ bụrụ na okpomọkụ brazing dị oke elu, mkpụrụ osisi metal ga-eto, a gaghịkwa emezighachi ihe onwunwe ahụ ọbụlagodi mgbe a gwọchara ya. Okpomọkụ siri ike nke ihe mejupụtara ntọala cast dị elu, nke na-agaghị emetụta ihe onwunwe ahụ n'ihi oke okpomọkụ brazing.

Ụfọdụ ihe ndị dị ka nickel base superalloys, ọkachasị ihe ndị e ji mmiri ozuzo mee ka ha sie ike, nwere ike ịgbawa nrụgide. Tupu a na-agba ọkụ, a ga-ewepụ nrụgide e nwere n'oge a kpamkpam, a ga-ebelatakwa nrụgide okpomọkụ n'oge a na-agba ọkụ.

(2) Enwere ike iji ntọala ọlaọcha, ọla kọpa dị ọcha, ntọala nickel na ihe na-agbaze ihe na-arụ ọrụ mee ka ihe na-agbaze ...

Mgbe a na-etinye brazing n'ime ikuku ma ọ bụ ebe nchekwa, enwere ike iji ọla kọpa dị ọcha mee ihe dị ka ihe na-ejupụta brazing. Okpomọkụ brazing bụ 1100 ~ 1150 ℃, nkwonkwo ahụ agaghịkwa emepụta mgbawa nrụgide, mana okpomọkụ ọrụ agaghị agafe 400 ℃.

Metal nke na-eji ihe mkpuchi brazing base nickel eme ihe bụ metal nke a na-ejikarị eme ihe na Superalloys n'ihi na ọ na-arụ ọrụ nke ọma n'okpomọkụ dị elu ma na-enweghị mgbawa nrụgide n'oge brazing. Ihe ndị mejupụtara alloy dị na ihe mkpuchi nickel bụ Cr, Si, B, obere ihe mkpuchi ahụ nwekwara Fe, W, wdg. Ma e jiri ya tụnyere ni-cr-si-b, b-ni68crwb brazing filler metal nwere ike ibelata ntinye n'etiti B n'ime metal nke dị n'okpuru ma mee ka oge okpomọkụ gbazee dịkwuo elu. Ọ bụ metal nke na-eji ihe mkpuchi brazing eme ihe maka akụkụ ọrụ dị elu na agụba turbine. Agbanyeghị, mmiri nke ihe mkpuchi W nwere na-aka njọ, oghere nkwonkwo na-esikwa ike ijikwa.

Ihe e ji eme brazing nke na-arụ ọrụ n'ime ya enweghị ihe Si, ọ nwekwara ezigbo iguzogide oxidation na iguzogide vulcanization. Enwere ike ịhọrọ okpomọkụ brazing site na 1150 ℃ ruo 1218 ℃ dịka ụdị solder si dị. Mgbe brazing gasịrị, enwere ike nweta nkwonkwo brazed nwere otu ihe ahụ dị ka metal isi mgbe ọgwụgwọ mgbasa 1066 ℃ gasịrị.

(3) Usoro nhazi ihe eji eme brazing nwere ike iji brazing mee ihe n'ime ọkụ ikuku na-echebe, brazing vacuum na njikọ mmiri mmiri na-agafe agafe. Tupu brazing, a ga-ewepụ mmanụ n'elu ya ma wepụ oxide site na iji sandpaper polishing, felt wheel polishing, acetone sprawing na chemical cleaning. Mgbe ị na-ahọrọ paramita usoro brazing, a ga-amarịrị na okpomọkụ okpomọkụ ekwesịghị ịdị oke elu na oge brazing kwesịrị ịdị mkpụmkpụ iji zere mmeghachi omume kemịkalụ siri ike n'etiti flux na metal base. Iji gbochie metal baseing ịgbawa, a ga-ebelata nrụgide tupu ịgbado ọkụ, a ga-ejikwa ọkụ ịgbado ọkụ mee ka ọ dị otu o kwere mee. Maka superalloys siri ike nke mmiri ozuzo, akụkụ ndị ahụ ga-ebu ụzọ gwọọ ngwọta siri ike, wee sie ya na okpomọkụ dị ntakịrị elu karịa ọgwụgwọ ike ịka nká, na n'ikpeazụ ọgwụgwọ ịka nká.

1) Ịkwanye ọkụ n'ime ikuku nchekwa, itinye ya n'ime ọkụ na-echebe ikuku nchekwa, chọrọ ezigbo ikuku nchekwa. Maka superalloys nwere w (AL) na w (TI) ihe na-erughị 0.5%, ebe igirigi ga-adị ala karịa -54 ℃ mgbe ejiri hydrogen ma ọ bụ argon. Mgbe ọdịnaya nke Al na Ti na-abawanye, elu alloy ka na-agbaze mgbe a na-ekpo ọkụ. A ga-eme ihe ndị a; Tinye obere obere mmiri ọkụ (dị ka fb105) wee wepụ ihe nkiri oxide ahụ na mmiri ọkụ; a na-ekpuchi mkpuchi dị arọ nke 0.025 ~ 0.038mm n'elu akụkụ; Fesa ihe na-agbaze n'elu ihe a ga-agbaze tupu oge eruo; Tinye obere mmiri ọkụ gas, dị ka boron trifluoride.

2) A na-ejikarị brazing vacuum brazing eme ihe iji nweta mmetụta nchebe ka mma na mma brazing. Lee tebụl 15 maka ihe ndị dị na njikọ superalloy nickel nkịtị. Maka superalloys nwere w (AL) na w (TI) ihe na-erughị 4%, ọ ka mma itinye akwa nickel 0.01 ~ 0.015mm n'elu eletrọniki, ọ bụ ezie na enwere ike ijide n'aka na mmiri nke solder ahụ enweghị ọgwụgwọ pụrụ iche. Mgbe w (AL) na w (TI) gafere 4%, ọkpụrụkpụ nke mkpuchi nickel ga-abụ 0.020.03mm. Mkpuchi dị oke mkpa enweghị mmetụta nchebe, mkpuchi dị oke oke ga-ebelata ike nke nkwonkwo ahụ. Enwere ike itinye akụkụ ndị a ga-agbakọta n'ime igbe maka brazing vacuum. Igbe ahụ kwesịrị ijupụta na getter. Dịka ọmụmaatụ, Zr na-amịkọrọ gas na okpomọkụ dị elu, nke nwere ike ịmepụta oghere mpaghara n'ime igbe ahụ, si otú a gbochie oxidation nke elu alloy.

Tebụl 15 Njirimara mekaniki nke Njikọ Vacuum Brazed nke superalloys ntọala nickel nkịtị

Ọdịdị na ike nke nkwonkwo a kpụchara akpụ nke Superalloy na-agbanwe site na oghere brazing, ọgwụgwọ mgbasa mgbe brazing gasịrị ga-eme ka uru kachasị nke oghere nkwonkwo dịkwuo elu. Dịka ọmụmaatụ, site na Inconel alloy, oghere kachasị nke nkwonkwo Inconel a kpụchara akpụ nke nwere b-ni82crsib nwere ike iru 90um mgbe ọgwụgwọ mgbasa na 1000 ℃ maka 1H; Agbanyeghị, maka nkwonkwo a kpụchara akpụ nke nwere b-ni71crsib, oghere kachasị dị ihe dị ka 50um mgbe ọgwụgwọ mgbasa na 1000 ℃ maka 1H.

3) Njikọ mmiri mmiri oge mgbanwe, njikọ mmiri oge mgbanwe, na-eji ihe dị n'etiti oyi akwa (ihe dị ka 2.5 ~ 100um ọkpụrụkpụ) nke ebe agbaze dị ala karịa ígwè ntọala dị ka ígwè ejuputa. N'okpuru obere nrụgide (0 ~ 0.007mpa) na okpomọkụ kwesịrị ekwesị (1100 ~ 1250 ℃), ihe dị n'etiti oyi akwa na-agbaze ma na-eme ka ígwè ntọala dị mmiri mmiri. N'ihi mgbasa ngwa ngwa nke ihe ndị dị na ya, ike isothermal na-eme na nkwonkwo ahụ iji mepụta njikọ ahụ. Usoro a na-ebelata ihe achọrọ maka elu ígwè ntọala nke ukwuu ma na-ebelata nrụgide ịgbado ọkụ. Isi ihe dị na njikọ mmiri oge mgbanwe bụ nrụgide, okpomọkụ, oge ijide na ihe mejupụtara oyi akwa. Tinye obere nrụgide iji mee ka elu njikọ nke njikọta nke njikọta ahụ dị mma. Okpomọkụ na oge na-enwe mmetụta dị ukwuu na arụmọrụ nke nkwonkwo ahụ. Ọ bụrụ na a chọrọ ka njikọ ahụ sie ike dịka ígwè ntọala ma ghara imetụta arụmọrụ nke ígwè ntọala, a ga-eji paramita usoro njikọ nke okpomọkụ dị elu (dịka ≥ 1150 ℃) na ogologo oge (dịka 8 ~ 24h) mee ihe; Ọ bụrụ na ebelata ogo njikọ nke njikọ ahụ ma ọ bụ ígwè ntọala enweghị ike iguzogide okpomọkụ dị elu, a ga-eji obere okpomọkụ (1100 ~ 1150 ℃) na obere oge (1 ~ 8h). Okpomọkụ dị n'etiti ga-ewere ihe mejupụtara ígwè ntọala ejikọtara dị ka ihe mejupụtara isi, ma tinye ihe dị iche iche na-ajụ oyi, dị ka B, Si, Mn, Nb, wdg. Dịka ọmụmaatụ, ihe mejupụtara ihe mejupụtara Udimet alloy bụ ni-15cr-18.5co-4.3al-3.3ti-5mo, ihe mejupụtara oyi akwa dị n'etiti maka njikọ oge mmiri bụ b-ni62.5cr15co15mo5b2.5. Ihe ndị a niile nwere ike ibelata okpomọkụ agbaze nke alloys Ni Cr ma ọ bụ Ni Cr Co ruo na nke kacha ala, mana mmetụta nke B bụ nke kacha pụta ìhè. Na mgbakwunye, oke mgbasa nke B nwere ike ime ka alloy interlayer na metal base dị n'otu ngwa ngwa.