Brazing ntawm Carbon Steel thiab Qis Alloy Steel

1. brazing khoom

 (1)Branzing ntawm Carbon Steel thiab Qis Alloy Steel suav nrog cov muag muag muag thiab tawv tawv.Cov siv dav siv tshuab hauv cov muag muag soldering yog Tin Lead Solder.Cov wettability ntawm cov hlua no rau cov hlau nce nrog cov txiaj ntsig tin, yog li cov cam nrog cov ntsiab lus siab yuav tsum tau siv rau cov pob qij txha sib khi.FESN2 intermetallic txheej txheej yuav tsim nyob rau ntawm lub interface ntawm tin thiab steel nyob rau hauv tin lead solder.Txhawm rau kom tsis txhob tsim ntawm compound hauv cov txheej no, qhov kub thiab kub thiab tuav lub sijhawm yuav tsum tau tswj kom zoo.Lub zog shear ntawm carbon steel pob qij txha tsoo tsoo nrog ob peb tus tub rog ua tau zoo tshaj plaws nrog rau cov neeg pleev xim kom siab dua uas nrog cov tshuaj pleev ib ce.

Rooj 1 Nqaj zog ntawm cov roj carbon steel pob qij txha ua ke nrog tin lead solder

Thaum brazing carbon hlau thiab cov roj hlau me me, tooj liab zinc thiab nyiaj tooj liab Zinc Brazing Cov chaw ua ke yog siv.Ntsiav tooj ntshiab muaj lub siab melting taw tes thiab yooj yim rau oxidize lub hauv paus hlau thaum brazing.Nws yog tsuas yog siv rau cov roj thaiv npog brazing thiab lub tshuab nqus pas.Txawm li cas los xij, nws yuav tsum raug sau tseg tias kev sib txawv ntawm cov pob qij txha sib tsoo yuav tsum tau ua kom muaj qhov teeb meem uas kev sib kis pob qij txha tsis tuaj yeem raug sau rau tus tooj liab.Cov pa roj carbon hlau thiab cov pob qij txha me hlau txuas nrog tus tooj ntshiab muaj zog.Feem ntau, lub zog shear yog 150 ~ 215mpa, thaum lub tensile lub zog yog faib ntawm 170 ~ 340MPA.

Piv nrog tus tooj liab ntshiab, lub suab nrov me me ntawm tooj liab zinc solder txo vim kev sib ntxiv ntawm zn.Txhawm rau tiv thaiv Znaporation thaum lub sij hawm branzing, ntawm ib sab tes, ib qho me me ntawm SI tuaj yeem muab ntxiv rau tus tooj liab zinc.Ntawm qhov tod tes, cov cua kub ceev ceev yuav tsum siv, xws li nplaim tawg, induction brazing thiab dip brazing.Cov pob qij txha ntawm cov roj carbon hlau thiab cov me me alloy steel brazed nrog tooj liab Zinc Folding hlau muaj lub zog zoo thiab muaj kuab yas.Piv txwv li, lub zog tensile thiab cov zog ntawm cov roj carbon steel pob qij txha tsoo zawg nrog b-cu62zn solder ncav cuag 420mpa thiab 290mpa.Lub ntsiab lus melting ntawm cov nyiaj tooj liab chaw nres tsheb yog qis dua li ntawm tooj liab zinc-solder, uas yooj yim rau rab koob vuam.Tus muab tub lim hlau no haum rau cov nplaim taws thiab cov ntsiab lus ntawm cov yas ua kom muaj ntau npaum li thaum lub sijhawm ua kom cua sov yuav tsum tau nce.Branzing Carbon Steel thiab Qis Alloy Steel nrog Silver Toolper Zinc Folding hlau tuaj yeem tau pob qij txha nrog lub zog zoo thiab muaj zog.Cov ntaub ntawv tshwj xeeb muaj teev nyob hauv Rooj 2.

Rooj 2 lub zog ntawm cov roj carbon steel pob qij qij zeb tsoo nrog cov nyiaj tooj liab Zinc Solder

(2) Flux: Flux lossis cov pa hluav taws xob yuav tsum siv rau brazing carbon hlau thiab cov hlau me hlau.Lub flux feem ntau yog txiav txim los ntawm xaiv cov tub muab tub lim hlau thiab kev sib tw.Thaum Tin La Lead Solder siv, cov kua xyaw ua kua ntawm zinc chloride thiab ammonium chloride tuaj yeem siv raws li flux lossis lwm yam tshwj xeeb flux.Cov seem ntawm Flux feem ntau yog corrosive heev, thiab kev sib koom tes yuav tsum tau nruj me ntsis tom qab kev txhom.

Thaum brazing nrog tooj liab zinc folding hlau, fb301 lossis fb302 flux yuav tsum raug xaiv, uas yog borax lossis kev sib xyaw ntawm borax thiab boric acid;Hauv Flame Brazing, sib xyaw ntawm methyl borate thiab formic acid kuj tseem tuaj yeem siv ua brazing flux, nyob rau hauv uas B2O3 vapor ua si lub luag haujlwm ntawm zaj kev tshem tawm zaj duab xis.

Thaum nyiaj Copper Zinc Brazing muab cov hlau siv, FB102, FB103 thiab FB104 Brazing fluxes tuaj yeem xaiv, boric acid thiab qee cov tshuaj fluorides.Cov seem ntawm flux yog corrosive rau qee yam thiab yuav tsum tau muab tshem tawm tom qab brazing.

2. Brazing technology

Qhov saum npoo yuav tsum tau welded yuav tsum raug ntxuav los ntawm kev siv tshuaj lossis tshuaj lom neeg kom ntseeg tau tias cov yeeb yaj kiab oxide thiab cov organic muaj teeb meem tshem tawm.Cov tshuaj ntxuav sab nraud yuav tsum tsis txhob ntxhib thiab yuav tsis ua raws li cov hlau chocolate lossis lwm cov av.

Carbon Steel thiab Qis Alloy Alloy Hlau tuaj yeem ntsia los ntawm ntau txoj kev brazing.Thaum lub sij hawm nplaim taws los, nruab nrab lossis me ntsis txo cov nplaim hluav taws yuav tsum tau siv.Thaum lub sijhawm ua haujlwm, cov khoom siv cua sov kom ua rau cov tub rog hlau thiab flux los ntawm nplaim taws yuav tsum zam kom ntau li ntau tau.Cov hau kev kub ceev xws li induction brazing thiab dip brazing yog qhov haum rau brazing ntawm quenched thiab tempered steel.Nyob rau tib lub sijhawm, quenching lossis brazing ntawm qhov ntsuas kub qis dua qhov kev ua kom nruj kom tsis txhob ua kom zoo softening hlau.Thaum brazing tsawg alloy lub zog ua ke hlau nyob rau hauv kev tiv thaiv huab cua, tsis tsuas yog siab cov roj flux yuav tsum tau siv los ua kom muaj cov tub muab tubtting thiab nthuav dav hlau rau saum npoo ntawm cov hlau.

Cov lus uas tseem tshuav ntawm Flux tau muab tshem tawm los ntawm cov qauv tshuaj lossis cov qauv siv tshuab.Cov seem ntawm cov organic brazing flux tuaj yeem so tau los yog ntxuav lossis dej cawv, acetone thiab lwm cov kuab tshuaj organic;Cov seem ntawm cov muaj zog corrosive flux xws li zinc chloride thiab ammonium chloride yuav tsum neous queous tov ua ntej, thiab tom qab ntawd ntxuav nrog dej kub thiab dej txias;Boric acid thiab boric acid flux seem yog qhov nyuaj rau tshem tawm, thiab tsuas yog daws tau cov tshuab siv tshuab lossis siv sijhawm ntev heev hauv dej nce.