1. Ihe na-agba agba
(1) Brazing filler metal cast iron brazing tumadi nakweere ọla kọpa zinc brazing filler metal na ọla kọpa brazing ọla ọla kọpa.Ụdị ọla kọpa zinc brazing a na-ejikarị eme ihe bụ b-cu62znnimusir, b-cu60zusnr na b-cu58znfer.Ike nkwụsịtụ nke nkwonkwo nkedo brazed na-erukarị 120 ~ 150MPa.Na ndabere nke ọla kọpa zinc brazing filler metal, Mn, Ni, Sn, AI na ihe ndị ọzọ na-agbakwunye na-eme ka nkwonkwo brazed nwee otu ike na isi metal.
Okpomọkụ na-agbaze nke ọla kọpa brazing filler metal dị ala.Enwere ike ịzenarị ihe owuwu na-emerụ ahụ mgbe ị na-agbanye ígwè nkedo brazing.Njikọ brazing na-arụ ọrụ nke ọma, karịsịa brazing filler metal nwere Ni, dị ka b-ag50cuzncdni na b-ag40cuznsnni, nke na-eme ka njikọ dị n'etiti ígwè brazing filler na nkedo ígwè.Ọ na-adabara karịsịa maka brazing nke ígwè nkedo nodular, nke nwere ike ime ka nkwonkwo ahụ nwee otu ike ahụ na isi ígwè.
(2) Mgbe a na-eji ọla kọpa na zinc eme ihe nkedo brazing, fb301 na fb302 na-ejikarị eme ihe, ya bụ, borax ma ọ bụ ngwakọta nke borax na boric acid.Na mgbakwunye, mgbanwe nke h3bo340%, li2co316%, na2co324%, naf7.4% na nac112.6% ka mma.
Mgbe ị na-eji ọla ọla kọpa na-ejupụta ọla kọpa na-eme ka ígwè brazing, enwere ike ịhọrọ fluxes dị ka fb101 na fb102, ya bụ ngwakọta nke borax, boric acid, potassium fluoride na potassium fluoroborate.
2. teknụzụ brazing
Tupu ịkwanye ígwè nkedo brazing, graphite, oxide, ájá, ntụpọ mmanụ na ihe ndị ọzọ dị n'elu ihe nkedo ga-eji nlezianya wepụ ya.Enwere ike iji nhịahụ ihe mgbaze na-edozi ahụ wepụ ntụpọ mmanụ, ebe enwere ike iji usoro arụ ọrụ dị ka ịgbawa ájá ma ọ bụ ịgba ọkụ ọkụ, ma ọ bụ usoro electrochemical iji wepụ graphite na oxides.Tụkwasị na nke ahụ, enwere ike iwepụ graphite site na iji ọkụ na-ekpo ọkụ na-agba ya ọkụ.
Nkedo nkedo nwere ike kpoo ọkụ site na ire ọkụ, ọkụ ọkụ ma ọ bụ ntinye.Ebe ọ bụ na SiO2 dị mfe ịmepụta n'elu igwe nkedo, mmetụta brazing na ikuku nchebe adịghị mma.N'ozuzu, a na-eji brazing flux maka brazing.Mgbe brazing nnukwu workpieces na ọla kọpa zinc brazing filler metal, a oyi akwa nke brazing flux ga-ebu ụzọ fesa n'elu ihicha, na mgbe ahụ workpieces ga-etinye n'ime ọkụ maka kpo oku ma ọ bụ kpo oku na-agbado ọkụ ọkụ.Mgbe arụ ọrụ ahụ na-ekpo ọkụ n'ihe dị ka 800 ℃, tinye mgbakwunye mgbakwunye, kpoo ya na okpomọkụ na-ekpo ọkụ, wee kpochapụ ihe agịga ahụ na nsọtụ nkwonkwo iji gbazee ihe na-ere ahịa ma mejupụta oghere ahụ.Iji mee ka ike nke nkwonkwo brazed dịkwuo mma, a ga-eme ọgwụgwọ annealing na 700 ~ 750 ℃ maka 20min mgbe brazing gasịrị, mgbe ahụ, a ga-eme ngwa ngwa ngwa ngwa.
Mgbe emechara brazing, enwere ike wepu oke mmiri na ihe fọdụrụ site na iji mmiri ọkụ saa ya.Ọ bụrụ na ọ siri ike iwepụ, enwere ike ihicha ya na 10% sulfuric acid aqueous solution ma ọ bụ 5% ~ 10% phosphoric acid aqueous solution, wee kpochaa ya na mmiri dị ọcha.
Oge nzipu: Jun-13-2022