Brazing yog hais txog txoj kev vuam uas lub vuam thiab vuam qis dua qhov taw tes ntawm qhov sib tsoo ntawm qhov vuam yog ib txhij ua kom sov rau lub melting kub ntawm lub solder, thiab qhov sib txawv ntawm cov khoom ua hauj lwm yog ntim nrog cov kua solder los txuas cov hlau. Nyob rau hauv brazing, oxide zaj duab xis thiab roj stain nyob rau saum npoo ntawm lub hauv paus hlau yog thawj zaug tshem tawm los pab txhawb lub capillary kev txiav txim tom qab lub solder yog melted, thiab lub wettability thiab capillary fluidity ntawm lub solder yog nce. Brazing yog muab faib ua brazing thiab soldering raws li lub melting point ntawm lub solder.
Lub brazing deformation yog me me, qhov sib koom ua ke yog du thiab zoo nkauj, thiab nws tsim nyog rau vuam precision, complex thiab cov khoom sib txawv, xws li honeycomb structural daim hlau, turbine hniav, cov cuab yeej carbide thiab cov ntawv luam tawm. Ua ntej lub brazing, lub workpiece yuav tsum tau ua tib zoo ua tiav thiab nruj nreem ntxuav kom tshem tawm cov roj thiab oxide tuab tuab heev los xyuas kom meej lub interface sib dhos sib txawv. Qhov sib txawv feem ntau yuav tsum nyob nruab nrab ntawm {{0}}.01 thiab 0.1 hli.
Cov txheej txheem brazing: Cov khoom ua haujlwm huv ntawm qhov chaw tau sib sau ua ke hauv ib lub voj voog, nrog cov khoom siv brazing muab tso rau ze ntawm qhov sib koom ua ke lossis nruab nrab ntawm qhov sib koom ua ke. Thaum lub workpiece thiab cov khoom siv brazing yog rhuab mus rau qhov kub me ntsis siab tshaj qhov melting point ntawm brazing muab tub lim hlau, cov khoom siv brazing melts (lub workpiece tsis melted), thiab yog nqus mus rau hauv thiab ntim nrog qhov sib txawv ntawm cov khoom workpieces. capillary kev txiav txim, thiab cov kua brazing cov ntaub ntawv thiab cov workpiece hlau sib koom diffuse thiab yaj. Tom qab lub condensation, ib tug brazed sib koom ua ke yog tsim.
Brazing yog ib qho ntawm cov txheej txheem ntxov tshaj plaws ntawm cov khoom siv los ntawm tib neeg. Thaum tib neeg tsis tau pib siv hlau, lawv tau tsim brazing los koom nrog hlau. Nyob rau hauv cov relics ancient unearthed nyob rau hauv Iyiv, cov hlab brazed nrog nyiaj-tooj tooj liab brazing cov ntaub ntawv thiab cov talisman thawv txuas nrog kub brazing cov ntaub ntawv raug soj ntsuam rau cov khoom 5,000 xyoo dhau los thiab ze li ntawm 4,000 xyoo dhau los . Nyob rau hauv lub ruins ntawm Pompeii, uas tau faus nyob rau hauv lub volcanic eruption nyob rau hauv 79 AD, muaj cov seem ntawm brazed tsev neeg brazing kav. Lub brazing muab tub lim hlau muaj qhov sib piv ntawm Sn:Pb=1:2, zoo ib yam li cov hlau muab tub lim siv nyob rau niaj hnub no. . Tuam Tshoj kuj siv tin-lead alloy brazing filler hlau nyob rau hauv thaum ntxov 5th caug xyoo BC, thiab kuj siv brazing technology nyob rau hauv lub Terracotta Warriors thiab Nees. Qhov ntxov tshaj plaws paub brazing nyob rau hauv cov ntaub ntawv nyob rau hauv Suav teb yog hais tias muaj ib tug huab nyob rau hauv Han Shu sau los ntawm Ban Gu nyob rau hauv lub Han Dynasty: "Hu Tong muaj kua muag zoo li kua muag, thiab yuav welded nrog kub thiab nyiaj, nws yog siv los ntawm cov kws txawj. hnub no." Nyob rau hauv Ming Dynasty Song Yingxing tus masterpiece "Tiangong Kaiwu" luam tawm nyob rau hauv 1637, "Suav me me brazing hmoov nrog dawb tooj liab ua npuas ncauj, lub loj brazing yog sim yuam lub rauj kom ntxiv dag zog rau nws. Yog hais tias lub Hutong kua txiv ua ke nrog nyiaj, nws yog zoo li. muaj zog li pob zeb niaj hnub no jade riam Cov flux xws li tus kov, ntxiv rau ib qho taw tes ntawm cov nyiaj, yuav tsis tawm mus sim siv lub lauj kaub puag ncig ntawm qhov chaw vuam flux rau nws, nws cov tshuaj yog tus kheej-propelled, thiab nws kuj yog ib lub voj voog. Cov lus piav qhia no qhia meej tias tooj liab brazing yuav tsum siv borax raws li cov flux thiab nyiaj brazing tuaj yeem siv Hutong resin li flux, thiab cov lus piav qhia zoo heev ntawm kev sib khi ntawm cov brazing muab tub lim hlau txawm hais tias lub tshuab brazing tau tshwm sim ua ntej, nws tsis tau tau tsim los ntev heev Tom qab nkag mus rau hauv lub xyoo pua 20th, nws txoj kev loj hlob nyob deb tom qab vuam tshuab kom txog rau thaum xyoo 20th xyoo 1930, raws li kev loj hlob ntawm metallurgical thiab tshuaj siv tshuab, brazing tshuab tau tsim sai thiab maj mam ua. ib tug ywj siab industrial ntau lawm technology. Tshwj xeeb tshaj yog tom qab Tsov Rog Thoob Ntiaj Teb thib Ob, vim yog kev txhim kho cov thev naus laus zis tshiab xws li aviation, aerospace, nuclear fais fab, hluav taws xob, thiab lwm yam, kev siv cov khoom siv tshiab thiab cov qauv tsim tshiab ua rau muaj kev xav tau ntau dua ntawm kev sib txuas thev naus laus zis, thiab kev siv tshuab brazing muaj. tau kho kom zoo heev. Kev tsom mus rau thiab kev loj hlob sai, ntau txoj kev brazing tshiab tau tshwm sim, thiab lawv cov ntawv thov tau dhau los ua ntau dua. Piv txwv li, kev tsim khoom ntawm ntau yam cuab yeej rau machining, tshwj xeeb tshaj yog cov cuab yeej carbide, cov cuab yeej drilling rau drilling thiab mining, ntau cov kav dej thiab cov thawv, cov dej tso tsheb hlau luam rau tsheb laij teb, cov khoom siv hluav taws xob sib txawv thiab cov qauv sib txawv rau ntau lub hom phiaj, Brazing tshuab yog dav. siv rau kev tsim khoom ntawm cov khoom xws li lub cev muaj zog thiab turbine hniav thiab lacing. Nyob rau hauv lub teeb muaj ntau lawm, brazing technology yog dav siv nyob rau hauv cov khoom siv kho mob, hlau implant prostheses, suab paj nruag, khoom siv hauv tsev, cookware, thiab tsheb kauj vab. Rau kev lag luam hluav taws xob thiab cov cuab yeej tsim khoom lag luam, brazing yog tib txoj kev sib txuas ua tau zoo hauv ntau yam. Piv txwv li, nyob rau hauv kev tsim khoom ntawm cov khoom, muaj ntau yam teeb meem ntawm kev sib txuas tsis yog hlau ntawm cov hlau thiab ceramics, iav, thiab lwm yam, thiab cov cua sov yuav tsum raug tiv thaiv hauv kev sib txuas ntawm cov hlau. Kev puas tsuaj rau cov khoom yog nyob ntawm kev siv tshuab brazing. Hauv cov chaw tsim hluav taws xob nuclear thiab nkoj nuclear fais fab nroj tsuag, cov khoom tseem ceeb xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob neutron feem ntau yog brazed.
