1. Kupisa zvinhu
(1) Brazing turusi simbi uye simende carbides anowanzo shandisa yakachena mhangura, zingi remhangura uye sirivheri yemhangura brazing filler simbi.Mhangura yakachena ine kunyorova kwakanaka kune ese marudzi esimende carbides, asi iyo yakanakisa mhedzisiro inogona kuwanikwa nekubhuroka mumhepo inoderedza yehydrogen.Panguva imwecheteyo, nekuda kwekushisa kwepamusoro kwebrazing, kushungurudzika mujojo yakakura, iyo inotungamirira kuwedzera kwemaitiro ekuputika.Simba rekugera rejoini rakashongedzwa nemhangura yakachena rinenge 150MPa, uye iyo yakabatana yepurasitiki yakakwira zvakare, asi haina kukodzera kune yakakwirira-tembiricha basa.
Mhangura zinc filler simbi ndiyo inonyanya kushandiswa simbi yekuzadza masimbi ekubhuroka masimbi uye simende carbides.Kuti uvandudze kunyorova kweiyo solder uye kusimba kwemubatanidzwa, Mn, Ni, Fe uye zvimwe zvinhu zvealloy zvinowanzowedzerwa kune solder.Semuenzaniso, w (MN) 4% inowedzerwa ku b-cu58znmn kuita kuti simba rekugera remajoini akaiswa simende asvike 300 ~ 320MPa patembiricha yekamuri;Inogona kuramba ichichengetedza 220 ~ 240mpa pa320 ℃.Kuwedzera huwandu hushoma hweCO pahwaro hweb-cu58znmn hunogona kuita kuti simba rekugera rejoni rakasungwa risvike 350Mpa, uye rine simba rakanyanya kusimba uye simba rekuneta, rinovandudza zvakanyanya hupenyu hwebasa rekucheka maturusi uye maturusi ekuchera dombo.
Iyo yakaderera nzvimbo yekunyungudika yesirivheri yemhangura brazing yekuzadza simbi uye iyo diki yekupisa kushushikana kwe brazed yejoinhi inobatsira kudzikisa tsika yekutsemuka yecemented carbide panguva yekubhuroka.Kuti uvandudze kunyorova kweiyo solder uye kuvandudza simba uye tembiricha yekushanda yejoini, Mn, Ni uye zvimwe alloy zvinhu zvinowanzowedzerwa kune solder.Semuenzaniso, b-ag50cuzncdni solder ine yakanakisa kunyorova kune simende carbide, uye iyo brazed yejoini ine yakanaka yakazara zvivakwa.
Pamusoro pemhando nhatu dziri pamusoro dzebrazing filler metals, Mn based uye Ni based brazing filler metals, senge b-mn50nicucrco uye b-ni75crsib, inogona kusarudzirwa simende carbide inoshanda pamusoro pe500 ℃ uye inoda yakakwirira majoini simba.Pakugadzika kwesimbi inomhanya-mhanya, simbi yakakosha yekuzadza simbi ine tembiricha yebrazing inoenderana netembiricha yekudzima inofanira kusarudzwa.Iyi simbi yekuzadza yakakamurwa kuita mapoka maviri: imwe ndeye ferromanganese type filler simbi, iyo inonyanya kuumbwa neferromanganese uye borax.Simba rekugera rejoint yakasungwa rinowanzoita 100MPa, asi chibatanidza chinoda kutsemuka;Imwe mhando yakakosha yemhangura alloy ine Ni, Fe, Mn uye Si haisi nyore kugadzira makatsemuka mumajoini akashongedzwa, uye simba rayo rekugera rinogona kuwedzerwa kusvika 300mpa.
(2) Kusarudzwa kwebrazing flux uye kudzivirira gasi brazing flux ichaenderana nesimbi yepasi uye yekuzadza simbi kuti isungirwe.Kana simbi yekushandisa uye simende carbide, iyo brazing flux inoshandiswa inonyanya borax uye boric acid, uye mamwe mafluorides (KF, NaF, CaF2, nezvimwewo) anowedzerwa.Fb301, fb302 uye fb105 fluxes inoshandiswa kune mhangura zinc solder, uye fb101 ~ fb104 fluxes inoshandiswa kune sirivheri yemhangura solder.Borax flux inonyanya kushandiswa kana yakakosha brazing filler simbi inoshandiswa kukweshesa simbi inomhanya.
Kuti udzivise oxidation yechishandiso simbi panguva yekudziya kupisa uye kudzivirira kuchenesa mushure mekuputika, gasi rakadzivirirwa brazing rinogona kushandiswa.Iyo gasi inodzivirira inogona kunge iri inert gasi kana kudzikisa gasi, uye dova regesi richave rakaderera pane -40 ℃ Cemented carbide inogona kugadzirwa pasi pekuchengetedzwa kwehydrogen, uye dova rehydrogen rinodiwa richave rakaderera pane -59. ℃.
2. Brazing teknolojia
Simbi yemudziyo inofanirwa kucheneswa isati yabikwa, uye iyo yakagadzirwa nemichina haifanire kunge yakatsetseka kuti ifambise kunyorova uye kupararira kwezvinhu uye brazing flux.Pamusoro pecemented carbide ichave jecha rinoputiswa risati rapiswa, kana kukwenenzverwa nesilicon carbide kana dhaimondi rinokuya vhiri kuti ribvise kabhoni yakawandisa pamusoro, kuitira kuti inyoroveswe nesimbi yekuzadza simbi panguva yekubhuroka.Cemented carbide ine titanium carbide yakaoma kunyorova.Copper oxide kana nickel oxide paste inoshandiswa pamusoro payo nenzira itsva uye yakabikwa mumhepo inoderedza kuita mhangura kana nickel shanduko kusvika kumusoro, kuitira kuti iwedzere kunyorova kweiyo solder yakasimba.
Iyo brazing yekabhoni mudziyo simbi inofanirwa kuitiswa isati yasvika kana panguva imwe chete yekudzima maitiro.Kana brazing inoitwa pamberi quenching muitiro, solidus tembiricha ye filler simbi inoshandiswa achava yakakwirira kupfuura quenching tembiricha siyana, kuitira kuti weldment ichine yakakwirira zvakakwana simba kana reheated kuti quenching tembiricha pasina kukundikana.Kana brazing uye kudzima zvasanganiswa, simbi yekuzadza ine solidus tembiricha padyo nekudzima tembiricha ichasarudzwa.
Alloy tool steel ine huwandu hwakawanda hwezvikamu.Yakakodzera brazing filler simbi, kupisa kupisa maitiro uye tekinoroji yekubatanidza brazing uye kupisa kupisa maitiro kunofanirwa kutariswa zvinoenderana neiyo chaiyo simbi mhando, kuitira kuti uwane yakanaka kubatana kushanda.
Kudzimisa tembiricha yesimbi yekumhanya-mhanya kunowanzo kukwira kupfuura tembiricha yekunyunguduka yesirivha mhangura uye mhangura zinc solder, saka zvinodikanwa kudzima usati wabatidza uye kubhuroka panguva kana mushure mekupisa kwechipiri.Kana kudzima kuchidikanwa mushure mekubhuroka, iyo chete yataurwa pamusoro apa yakakosha brazing filler simbi inogona kushandiswa kubhuroka.Paunenge uchigadzira maturusi ekucheka simbi yakakwirira, zvakakodzera kushandisa coke furnace.Kana iyo brazing filler simbi yanyungudutswa, bvisa chishandiso chekucheka wobva waitsikirira, buritsa yakawandisa brazing filler simbi, wobva waita kudzima mafuta, wobva waipisa pa550 ~ 570 ℃.
Paunenge uchigadzira simende ye carbide blade nesimbi yekushandisa bar, iyo nzira yekuwedzera gap rekubhuroka uye kushandisa epurasitiki muripo wegasket mugomba rekubhuroka inofanira kugamuchirwa, uye kunonoka kutonhora kunofanirwa kuitwa mushure mekukweshesa kudzikisa kushushikana kwebrazing, kudzivirira kuputika uye kuputika. kurebesa hupenyu hwesevhisi yesamende ye carbide tool assembly.
Mushure mekuputika kwefiber, iyo inosara paweldment inofanira kushambidzwa nemvura inopisa kana kuwanda kwekubvisa slag musanganiswa, uye wobva wanyudzwa nemhinduro yakakodzera ye pickling kubvisa iyo oxide firimu pane base tool rod.Zvisinei, chenjerera kuti usashandise nitric acid solution kudzivirira kuora kwesimbi yakabatana.
Nguva yekutumira: Jun-13-2022