Cov ntaub ntawv yooj yim Ntawm Cov Ntsiab Lus Tsawg Melting Alloys
Oct 20, 2021
Lub melting point kub ntawm qhov tsawg melting point alloy melting khoom yog feem ntau 60 mus rau 200 degree. Cov yaj siv ib qho kev faib ua feem ntawm bismuth, cadmium, tin, lead, dysprosium, indium thiab lwm yam ntsiab lus raws li lub ntsiab Cheebtsam los tsim txawv eutectic tsawg melting point alloys.
Muaj ntau ntau yam uas tsis tshua muaj melting point alloys, thiab qhov yooj yim dua siv yog bismuth txo tin alloy nrog 58 feem pua bismuth thiab 42 feem pua tin. Cov txheej txheem melting thiab casting yog raws li nram no: lub blended bismuth txo tin alloy cov ntaub ntawv yog muab tso rau hauv lub melting lauj kaub, thiab ces rhuab mus txog 140 degree C (qhov kub thiab txias yuav ntsuas los ntawm ib tug semiconductor qhov chaw tus pas ntsuas kub los yog ib tug ntau tus pas ntsuas kub), thiab cov pwm tuaj yeem cam khwb cia tom qab sib xws. . Tom qab casting, nws tuaj yeem txias li ib nrab ib teev. Thaum kawg, kho qhov seem seem tshuav los ntawm qhov casting, uas yog, kom tau raws li qhov yuav tsum tau ua.
Rau cov pwm uas tsis tshua muaj melting point alloys, pwm kub yuav tsum tsis txhob siab dhau, thiab cov khoom yas yog yooj yim los ua raws li cov kab noj hniav yog tias pwm kub siab dhau lawm.
Thaum lub hauv paus tseem ceeb ntawm kev txhaj tshuaj molded ib feem muaj qhov curvature loj thiab tsis tuaj yeem tsim los ntawm cov tub ntxhais hlau (cov khoom yas nrog qhov loj curvature, cov tub ntxhais tsis tuaj yeem rub tawm nrog cov hlau zoo tib yam), nws tuaj yeem tsim tau nrog qis qis qis. point alloy. Cov txheej txheem tsim khoom yog raws li hauv qab no: sib tov cov ntsiab lus alloy hauv kev faib ua feem, ncuav rau hauv lub thawv melting, cua sov thiab yaj, thiab tom qab ntawd ntsuas qhov kub thiab txias (siv qhov kev cob qhia kub zoo tib yam) los nrum cov tub ntxhais hlau (cov pwm rau casting alloy core yuav tsum. rhuab mus txog 60 degree). ), tshem tawm cov tub ntxhais alloy tom qab teeb tsa.
Cov tub ntxhais ntawm cov saum toj no txo qhov hais tias tsis tshua muaj siab casting yog muab tso rau hauv cov pwm txhaj, thiab txhaj tshuaj tuaj yeem ua tau. Tom qab kev txhaj tshuaj molding, cov khoom yas raug muab tawm ua ke nrog cov tub ntxhais, thiab tom qab ntawd cov tub ntxhais hlau alloy hauv cov yas yog yaj thiab ntws tawm los ntawm cov txheej txheem cua sov (lossis lwm txoj kev cua sov), thiab cov yas tuaj yeem tau txais.
Qhov qis melting point alloy yaj cov khoom yog rhiab heev rau qhov kev hloov ntawm qhov kub thiab txias, yog li nws tsim nyog rau cov yaj ntawm qhov kub thiab txias hom fuse siv los tiv thaiv cov khoom siv hluav taws xob cua sov los ntawm overheating. Rau cov fuses ua nrog lawv, qhov rhiab heev ntawm nws qhov kev txiav txim yuav tsum tau txhim kho los ntawm cov neeg kho tshuab quab yuam generated los ntawm ntxiv springs, thiab lwm yam. Nyob rau tib lub sij hawm, lub yaj nws tus kheej kuj yuav tsum xav txog cov khoom siv zog sib xws.