1. Ihe e ji eme brazing
(1)Ịkwanye ígwè carbon na obere alloy ígwè gụnyere brazing dị nro na brazing siri ike. Ihe a na-ejikarị eme ihe n'ịkwanye ígwè dị nro bụ ihe a na-eji eme tin lead solder. Mmiri mmiri nke ihe a na-agbakọta na ígwè na-abawanye ka ọdịnaya tin na-abawanye, yabụ ihe a na-agbakọta nwere nnukwu ọdịnaya tin kwesịrị iji maka mkpuchi njikọ. Enwere ike ịmepụta oyi akwa ngwakọta Fesn2 n'etiti tin na ígwè na ihe a na-agbakọta ígwè tin lead solder. Iji zere ịmepụta ihe a na-agbakọta ígwè na oyi akwa a, a ga-achịkwa okpomọkụ na oge ijide ya nke ọma. Ike shear nke njikọ ígwè carbon nke ejiri ọtụtụ ihe a na-agbakọta ígwè tin lead solders dị na Tebụl 1. N'ime ha, ike nkwonkwo nke ejiri 50% w (SN) mee bụ nke kachasị elu, ike nkwonkwo nke ejiri ihe a na-agbakọta ígwè nke enweghị antimony dị elu karịa nke antimony.
Tebụl 1 Ike ịkwa akwa nke njikọ ígwè carbon nke ejiri ihe na-agbaze tin lead mee
Mgbe a na-eji ígwè carbon na-eme brazing na obere ígwè alloy, a na-ejikarị ọla kọpa dị ọcha, ọla kọpa zinc na ọla kọpa ọlaọcha na-eme brazing zinc brazing eme ihe. Ọla kọpa dị ọcha nwere ebe agbaze dị elu ma dị mfe ịgbaze na ígwè ntọala n'oge brazing. A na-ejikarị ya eme brazing gas protected na vacuum brazing. Agbanyeghị, ọ dị mkpa ịmara na oghere dị n'etiti njikọ brazing kwesịrị ịdị obere karịa 0.05mm iji zere nsogbu na enweghị ike ijupụta oghere nkwonkwo n'ihi ezigbo mmiri ọla kọpa. Ọla kọpa na njikọ ígwè alloy dị ala nke ejiri ọla kọpa dị ọcha mee nwere ike dị elu. N'ozuzu, ike shear bụ 150 ~ 215mpa, ebe ike tensile na-ekesa n'etiti 170 ~ 340mpa.
Ma e jiri ya tụnyere ọla kọpa dị ọcha, ebe agbaze nke ihe e ji agbaze nke ihe e ji agbaze nke ọla kọpa zinc na-ebelata n'ihi mgbakwunye nke Zn. Iji gbochie ikuku Zn n'oge brazing, n'otu aka, enwere ike itinye obere Si na ihe e ji agbaze nke ọla kọpa zinc; N'aka nke ọzọ, a ga-eji ụzọ ọkụ ngwa ngwa, dị ka brazing ọkụ, brazing induction na brazing dip. Njikọ nke ígwè carbon na obere alloy ígwè brazing nke ejiri ọla kọpa zinc filler mee nwere ike na ike dị mma. Dịka ọmụmaatụ, ike nrụgide na ike shear nke njikọ ígwè carbon brazing nke ejiri b-cu62zn solder mee na-eru 420MPa na 290mpa. Ebe agbaze nke ihe e ji agbaze nke ọla kọpa ọla kọpa ọla dị ala karịa nke ihe e ji agbaze nke ọla kọpa zinc, nke dị mma maka ịgbado agịga. Metal a dị mma maka brazing ọkụ, brazing induction na brazing nke ígwè carbon na obere alloy ígwè, mana ọdịnaya nke Zn kwesịrị ibelata dịka o kwere mee n'oge brazing ọkụ, a ga-amụbakwa ọnụego ọkụ. Steel brazing carbon na obere alloy ígwè alloy nwere ọla kọpa zinc filler nwere ike nweta nkwonkwo nwere ike na plasticity dị mma. E depụtara data a kpọmkwem na Tebụl 2.
Tebụl nke abụọ ike nke njikọ ígwè carbon dị ala nke ejiri ọla kọpa zinc ọla kọpa mee
(2) Flux: a ga-eji flux ma ọ bụ gas na-echebe ihe maka brazing carbon steel na obere alloy metal. A na-ekpebikarị flux ahụ site na iji usoro ihe eji emeju ihe na brazing ahọpụtara. Mgbe ejiri ihe na-agbaze tin lead solder, enwere ike iji mmiri gwakọtara nke zinc chloride na ammonium chloride dị ka flux ma ọ bụ flux pụrụ iche ndị ọzọ. Ihe fọdụrụ nke flux a na-emebi emebi nke ukwuu, a ga-ehichakwa nkwonkwo ahụ nke ọma mgbe brazing gasịrị.
Mgbe a na-eji ígwè ọla kọpa zinc eme brazing, a ga-ahọrọ fb301 ma ọ bụ fb302 flux, ya bụ, borax ma ọ bụ ngwakọta nke borax na boric acid; N'ime brazing ọkụ, a pụkwara iji ngwakọta nke methyl borate na formic acid mee brazing flux, nke B2O3 vapor na-arụ ọrụ dị ka iwepụ ihe nkiri.
Mgbe ejiri ọla kọpa zinc brazing ọla kọpa ọlaọcha mee ihe, enwere ike ịhọrọ fb102, fb103 na fb104 brazing fluxes, ya bụ, ngwakọta nke borax, boric acid na ụfọdụ fluorides. Ihe fọdụrụ na flux a na-emebi emebi ruo n'ókè ụfọdụ ma a ga-ewepụ ya mgbe brazing gasịrị.
2. Teknụzụ ịme brazing
A ga-eji usoro igwe maọbụ kemịkalụ hichaa elu a ga-eji agwakọta ya iji hụ na ewepụla ihe nkiri oxide na ihe ndị dị ndụ kpamkpam. Elu a na-ehicha agaghị adị oke njọ ma ghara ịrapara na iberibe ígwè ma ọ bụ unyi ndị ọzọ.
Enwere ike iji ụzọ dị iche iche a na-ejikarị eme ihe na-eme ka ígwè carbon na ígwè alloy dị ala sie ike. N'oge a na-eme ka ọkụ dị ọkụ, a ga-eji ọkụ na-anọpụ iche ma ọ bụ na-ebelata ntakịrị. N'oge a na-arụ ọrụ, a ga-ezere ikpo ọkụ kpọmkwem nke ígwè na-ejupụta ihe na ọkụ ọkụ dịka o kwere mee. Usoro kpo oku ngwa ngwa dịka induction brazing na dip brazing dị mma maka brazing nke ígwè a gbanyụrụ agbanyụ na nke a gbanyụrụ agbanyụ. N'otu oge ahụ, a ga-ahọrọ quench ma ọ bụ brazing na okpomọkụ dị ala karịa tempering iji gbochie nro nke ígwè ntọala. Mgbe a na-eme brazing obere alloy dị elu na ikuku nchebe, ọ bụghị naanị na ọ dị mkpa ka a na-eme ka gas dị ọcha, kamakwa a ga-eji gas fluxing iji hụ na mmiri na mgbasa nke ígwè na-ejupụta ihe na-ejupụta ihe na-ekpuchi ...
Enwere ike iji usoro kemịkalụ ma ọ bụ nke igwe wepụ ihe fọdụrụnụ. Enwere ike iji mmanụ ụgbọala, mmanya, acetone na ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị ọzọ na-agbaze ihe ndị dị na mmiri mmiri NaOH hichaa ha, wee jiri mmiri ọkụ na oyi hichaa ha; ọ na-esiri ike iwepụ ihe fọdụrụ na mmiri mmiri Boric acid na boric acid, a pụkwara idozi ha naanị site na usoro igwe ma ọ bụ imikpu ha ruo ogologo oge na mmiri na-arị elu.
Oge ozi: Jun-13-2022