Cov yam ntxwv thiab qhov sib txawv ntawm cov khoom siv tooj liab thiab tooj liab
Yog vim li cas vim li cas cov hluav taws xob soldering hlau taub siv cov khoom siv tooj liab yog ua raws li cov hauv qab no: thawj qhov kev xaiv ntawm cov khoom siv rau cov hlau soldering yog cov molecules ntawm soldering hlau taub cov khoom yuav tsum muaj affinity nrog cov molecules ntawm lub solder, yog li ntawd. tias lub taub hau hlau tuaj yeem lo rau nws tom qab nws rhuab. Siv cov welding tin kom yooj yim rau kev ua haujlwm vuam; Thib ob, cov khoom siv ntawm cov hlau taub hau muaj lub peev xwm loj dua cov cua sov, uas txhais tau hais tias kev txuag hluav taws xob zoo dua; cov khoom muaj zoo oxidation tsis kam ntawm vuam kub. Ua ntej lub advent ntawm alloy ntev-lub neej soldering hlau tswv yim, tooj liab, ib tug ntawm cov hlau cov ntaub ntawv uas ua tau raws li cov saum toj no tej yam kev mob, yog thawj cov khoom.
Cov yam ntxwv ntawm liab tooj liab yog tias nws ua cua sov sai thiab yooj yim rau tin, tab sis nws tsis tiv taus corrosion. Lub taub hau hlau tsis muaj zog txaus thaum siv hauv micro vuam thiab yooj yim rau deform thiab tawg. Niaj hnub no, lub taub hau ntawm cov hlau yog ua los ntawm cov khoom siv hlau uas tsis yooj yim tawg, thiab cov txheej txheem sab nrauv yog corrosion-resistant thiab yooj yim rau siv tin txheej. Txawm hais tias cov thermal conductivity tsis zoo, nws muaj kev cuam tshuam me ntsis, tab sis nws muaj zog heev.
Qhov siab dua qhov purity ntawm tooj liab, qhov ntau ruaj nws yog, thiab qhov denser nws yog, qhov ntau ruaj nws yog. Qhov laj thawj yog vim li cas tooj liab taub yog ablated yog tias qhov kub thiab txias dhau lawm. Cov tooj liab ua ke nrog cov hlau lead-tin alloy los tsim cov hlau uas muaj tooj liab, uas yog corroded, thiab cov ntsiab lus tshiab ntawm tooj liab yuav yog tom qab cua sov mus rau 350 degrees thiab clamping, rauj thiab forge lub tinned ib feem, uas yuav ua tau zoo heev rau kev pab cuam lub neej. . Vuam nrog kub-kub solder (xws li cov hlau lead) tuaj yeem siv lub taub nyiaj hlau.
Cov lus qhia ntawm tooj dag soldering hlau tsis zoo thermal conductivity thiab muaj zog dua tooj liab hauv qab 400 degrees Celsius. Thaum kub tshaj 450 degrees, lawv yuav ablate sai thiab nyob deb inferior tooj liab. Nyob rau hauv qhov kev ntsuam xyuas zaum kawg, lub neej ntawm soldering hlau taub yog nyob ntawm ntau lub sij hawm ua hauj lwm kub ntawm lub soldering hlau taub.
Copper - raws li ib tug thermal conductor, nws yog ib qho tseem ceeb ntawm lub soldering hlau taub. Nws suav txog li 85% ntawm cov khoom siv ntawm cov hlau taub hau. Tooj liab muaj cov thermal conductivity zoo, uas yuav pab tau rau lub taub hau kom sov sai sai. Cov lus qhia zoo soldering yog ua los ntawm tooj liab. Tam sim no, qee cov tuam ntxhab siv tooj dag lossis txawm tias hlau ncaj qha rau cov txiaj ntsig. Txo cov nqi thiab kuj txo cov thermal conductivity ntawm cov hlau taub hau.
Tsis muaj teeb meem dab tsi ntawm cov taub hau hlau siv, nws xav tau kev saib xyuas. Lub npe hu ua kev saib xyuas, thawj zaug, tsis txhob siv nws ntawm qhov kub thiab txias, qhov thib ob, tsis txhob cia koj cov hlau taub hau kub hnyiab hauv huab cua yam tsis muaj kev tiv thaiv ntawm solder, qhov thib peb, thaum ntxuav cov hlau taub hau, siv daim txhuam cev kub-resistant. thiab ntxiv dej, thiab tsis txhob siv lub cuab yeej ntse los txhuam nws.
