1. Ihe na-agbaze
Enwere ike iji ụdị ihe niile e ji agbaze ihe nwere okpomọkụ dị ala karịa 3000 ℃ maka brazing W, a pụkwara iji ihe e ji agbaze ihe nwere ọla kọpa ma ọ bụ ọlaọcha mee ihe maka ihe ndị nwere okpomọkụ dị ala karịa 400 ℃; A na-ejikarị ọla edo, manganese, manganese, palladium ma ọ bụ ihe e ji agbaze ihe eme ihe maka ihe ndị e ji eme ihe n'etiti 400 ℃ na 900 ℃; Maka ihe ndị e ji eme ihe karịrị 1000 ℃, a na-ejikarị ọla dị ọcha dị ka Nb, Ta, Ni, Pt, PD na Mo eme ihe. Okpomọkụ ọrụ nke ihe ndị e ji agbaze ihe na platinum base solder erutela 2150 ℃. Ọ bụrụ na emee ọgwụgwọ mgbasa ozi 1080 ℃ mgbe brazing gasịrị, okpomọkụ kachasị elu nwere ike iru 3038 ℃.
A na-eji ọtụtụ ihe ndị e ji eme brazing w eme brazing Mo, a na-ejikwa ihe ndị e ji ọla kọpa ma ọ bụ ọlaọcha mee ihe maka ihe ndị Mo na-arụ ọrụ n'okpuru 400 ℃; Maka ngwaọrụ eletrọnịkị na akụkụ ndị na-abụghị nke nhazi na-arụ ọrụ na 400 ~ 650 ℃, a na-eji ihe ndị e ji Cu Ag, Au Ni, PD Ni ma ọ bụ Cu Ni mee ihe; A na-eji ihe ndị e ji ígwè mee ihe dị ka titanium ma ọ bụ ihe ndị ọzọ e ji ígwè mee ihe dị ka ihe ndị na-agbaze nke ọma mee ihe maka ihe ndị na-arụ ọrụ n'okpomọkụ dị elu. A na-amarakwa na a naghị atụ aro ka e jiri ihe ndị e ji manganese mee, cobalt na nickel mee ihe iji zere ịmepụta ihe ndị na-agbawa agbawa n'etiti ígwè na nkwonkwo brazing.
Mgbe ejiri ihe TA ma ọ bụ Nb mee ihe n'okpuru 1000 ℃, enwere ike ịhọrọ ọgwụ ndị dabere na ọla kọpa, manganese, cobalt, titanium, nickel, gold na palladium, gụnyere Cu Au, Au Ni, PD Ni na Pt Au_ Ni na Cu Sn solders nwere ezigbo mmiri mmiri na TA na Nb, ezigbo brazing seam formation na ike nkwonkwo dị elu. Ebe ọ bụ na ọla ndị ejiri ọlaọcha mee ihe na-eme ka ọla brazing ghara ịgbawa agbawa, a ga-ezere ha ruo n'ókè o kwere mee. Maka ihe ndị ejiri mee ihe n'etiti 1000 ℃ na 1300 ℃, a ga-ahọrọ ọla Ti, V, Zr ma ọ bụ alloys dabere na ọla ndị a nke na-emepụta ihe siri ike na mmiri mmiri na-enweghị ngwụcha dị ka ọla brazing filler. Mgbe okpomọkụ ọrụ dị elu, enwere ike ịhọrọ ígwè ihe na-ejupụta nwere HF.
W. Lee tebụl 13 maka ọla ndị na-ejupụta ihe mkpuchi maka Mo, Ta na Nb n'oge okpomọkụ dị elu.
Tebụl 13 ọla ndị na-ejupụta ihe mkpuchi maka brazing okpomọkụ dị elu nke ọla ndị na-adịghị ike
2. Teknụzụ ịme brazing
Tupu a na-eme brazing, ọ dị mkpa ka a jiri nlezianya wepụ oxide ahụ n'elu ígwè na-adịghị emegharị ahụ. Enwere ike iji igwe na-egweri ihe, na-eme ka ájá gbawaa, na-ehicha ihe na ultrasonic ma ọ bụ na-ehicha kemịkal. A ga-eme brazing ozugbo e mechara nhicha ahụ.
N'ihi ike W dị n'ime ya, a ga-eji nlezianya ejikwa akụkụ w n'ọrụ mgbakọ ihe iji zere mmebi. Iji gbochie mmepụta nke brittle tungsten carbide, a ga-ezere kọntaktị kpọmkwem n'etiti W na graphite. A ga-ewepụ nrụgide nrụgide n'ihi nhazi ma ọ bụ ịgbado ọkụ tupu ịgbado ọkụ. Ọ dị mfe ịgbado ọkụ mgbe okpomọkụ rịrị elu. Ọkwa vacuum ga-adị elu nke ọma n'oge brazing. Mgbe a na-eme brazing n'ime oke okpomọkụ nke 1000 ~ 1400 ℃, ogo vacuum agaghị adị ala karịa 8 × 10-3Pa. Iji melite okpomọkụ agbaze na okpomọkụ ọrụ nke nkwonkwo, enwere ike ijikọ usoro brazing na ọgwụgwọ mgbasa mgbe agbadochara ọkụ. Dịka ọmụmaatụ, a na-eji b-ni68cr20si10fel solder iji brazing W na 1180 ℃. Mgbe ọgwụgwọ mgbasa ugboro atọ nke 1070 ℃ /h, 1200 ℃ /h3.5 na 1300 ℃ /h mgbe ịgbado ọkụ gasịrị, okpomọkụ ọrụ nke nkwonkwo brazed nwere ike iru ihe karịrị 2200 ℃.
A ga-atụle obere ihe mejupụtara mgbasawanye okpomọkụ mgbe a na-ejikọta nkwonkwo brazed nke Mo, oghere nkwonkwo kwesịrị ịdị n'etiti 0.05 ~ 0.13MM. Ọ bụrụ na ejiri ihe eji arụ ọrụ, họrọ ihe nwere obere ihe mejupụtara mgbasawanye okpomọkụ. Mgbakwunye Mo na-eme mgbe brazing ire ọkụ, ọkụ ikuku a na-achịkwa, ọkụ vacuum, ọkụ induction na okpomọkụ iguzogide gafere okpomọkụ recrystallization ma ọ bụ okpomọkụ recrystallization na-ebelata n'ihi mgbasa nke ihe ndị na-agbaze. Ya mere, mgbe okpomọkụ brazing dị nso na okpomọkụ recrystallization, oge brazing dị mkpụmkpụ, ka mma. Mgbe brazing gafere okpomọkụ recrystallization nke Mo, a ga-achịkwa oge brazing na ọnụego oyi iji zere mgbawa nke oyi ngwa ngwa kpatara. Mgbe ejiri brazing ire ọkụ oxyacetylene, ọ dị mma iji flux agwakọta, ya bụ, borate ụlọ ọrụ mmepụta ihe ma ọ bụ silver brazing fluid yana flux okpomọkụ dị elu nwere calcium fluoride, nke nwere ike inweta ezigbo nchebe. Usoro a bụ ibu ụzọ kpuchie oyi akwa brazing ọlaọcha n'elu Mo, wee kpuchie flux okpomọkụ dị elu. Mmiri brazing ọlaọcha nwere ọrụ na oke okpomọkụ dị ala, okpomọkụ na-arụ ọrụ nke oke okpomọkụ dị elu nwere ike iru 1427 ℃.
A na-eji ihe ndị dị na TA ma ọ bụ Nb eme ihe n'okpuru oghere ikuku, ọkwa oghere ikuku ekwesịghịkwa 1.33 × 10-2Pa. Ọ bụrụ na a na-eme brazing n'okpuru nchekwa nke gas na-adịghị arụ ọrụ, a ga-ewepụ ihe ndị na-adịghị mma dị ka carbon monoxide, ammonia, nitrogen na carbon dioxide kpamkpam. Mgbe a na-eme brazing ma ọ bụ brazing n'ikuku, a ga-eji ígwè pụrụ iche na-ejupụta brazing na flux kwesịrị ekwesị. Iji gbochie TA ma ọ bụ Nb ka ọ ghara ịbanye na oxygen n'oge okpomọkụ dị elu, enwere ike itinye akwa ọla kọpa ma ọ bụ nickel n'elu ya ma nwee ike ịme ọgwụgwọ mgbasa ozi.
Oge ozi: Jun-13-2022