Txoj cai ntawm soldering hlau welding
Nws yog science rau solder. Lub tswv yim tom qab hluav taws xob soldering hlau welding yog siv cov rhuab soldering hlau kom sov thiab yaj cov khoom solder hlau, ces siv cov flux ntws mus rau hauv cov hlau uas tau welded, thiab thaum kawg, tom qab txias, ua ib tug khoom thiab trustworthy solder daim ntawv cog lus.
Thaum tooj liab nto thiab tin-lead alloy yog siv los ua ib tug solder, lub solder thawj wets lub tooj liab nto. Raws li qhov tshwm sim ntawm cov ntub dej, lub solder ces maj mam diffuses rau cov tooj liab hlau, tsim ib txheej adhesion ntawm qhov chaw tiv tauj uas khov kho ob cov ntaub ntawv. Raws li qhov tshwm sim, ntub dej, diffusion, thiab metallurgy yog peb lub cev thiab cov txheej txheem tshuaj siv rau hauv kev sib txuas.
1. Wetting: Siv lub zog capillary, lub melted solder khiav ib ncig ntawm cov pob me me thiab crystalline qhov chaw ntawm lub hauv paus hlau saum npoo, tsim ib txheej nplaum uas tso cai rau lub hauv paus hlau thiab cov hlua khi rau ib leeg thoob plaws hauv cov txheej txheem vuam. Cov hlau lub atoms nyob ze rau ib leeg, mus rau qhov chaw uas lawv gravitational rub active.
Cov xwm txheej hauv ib puag ncig uas ua rau ntub dej: lub hauv paus hlau nto uas tau welded yuav tsum tsis muaj impurities thiab oxides.
Daim duab piv txwv Dej tsis tuaj yeem moisten lub lotus yog tias nws poob rau hauv nws nplooj los tsim cov tee dej. Yog tias koj tso dej rau ntawm paj rwb, nws yuav nkag mus rau hauv cov fibers, cia cov paj rwb kom moistened.
2. Diffusion: Kev sib nrig diffusion ntawm solder thiab lub hauv paus hlau atoms pib tshwm sim thaum wetting zuj zus. Thaum qhov kub nce siab, cov atoms hauv cov lattice feem ntau yog nyob rau hauv qhov xwm txheej ntawm thermal co. Lub hauv paus hlau thiab solder atoms hla ntawm qhov chaw sib chwv thiab nkag mus rau ib leeg cov txheej txheem lattice vim qhov nce hauv atomic kev ua si. Cov cua kub kub thiab lub sij hawm txiav txim siab lub atoms tus nqi ntawm kev txav thiab tus lej.
3. Metallurgical ua ke: Ib txheej intermediary —- hlau compound yog generated ntawm ob hlau vim yog kev sib nrig sib diffusion ntawm lub solder thiab lub hauv paus hlau. Ib tug hlau compound yuav tsum tsim ntawm lub hauv paus cov ntaub ntawv yuav tsum tau welded thiab lub solder thiaj li yuav ua tau ib tug zoo solder daim ntawv cog lus. txhawm rau tsim kom muaj kev sib txuas ntawm metallurgical muaj zog nrog lub hauv paus hlau.
