Soldering kub tus qauv rau hluav taws xob soldering hlau_Kev tshuaj xyuas ntawm cov ntsiab lus ntawm cov hluav taws xob soldering hlau
1. Cov ntsiab lus ntawm kev tuav vuam
Cov txheej txheem welding feem ntau yog hloov cov cua sov los ntawm cov hlau taub hau thiab yaj lub vuam kom txuas cov vuam qhov (cov khoom siv hluav taws xob, thiab lwm yam) thiab cov ntaub qhwv (cov khoom yuav tsum tau welded).
Kev tuav vuam cov ntsiab lus: cov khoom siv hluav taws xob (chaw nres tsheb lossis cov hlau soldering), cov khoom siv cua sov (cov tub ntxhais cua sov), cov hlua hlau, cov hlua, vuam qhov chaw, thiab lwm yam.;
2. Kev paub txog kev paub txog kev siv lead-dawb
Yav dhau los solder yog ib tug tin-lead alloy, xws li 63/37 (63% tin, 37% txhuas), nrog rau ib tug melting point ntawm 183 degrees. Vim muaj cov tshuaj toxicity ntawm txhuas rau ib puag ncig, cov kev cai xws li ROHS txwv tsis pub siv rau hauv cov khoom siv hluav taws xob. Yog li lwm cov hlau lead-dawb solders tau tshwm sim.
Lead-free solder piv rau txhuas-raws li solder:
Lub melting point nce li ntawm 34-44 degrees; 2. Cov ntsiab lus tin nyob rau hauv lub solder nce; 3. Lub peev xwm siv tin tsis zoo (tsis zoo solderability). Lub vuam diffusion ntawm cov hlau lead-free solder tsis zoo, thiab qhov chaw diffusion yog yuav luag 1/3 ntawm eutectic solder.
3. Kev ceev vuam kub qauv
Qhov ntsuas kub zoo tshaj plaws rau kev ua haujlwm yog qhov chaw melting ntawm solder siv +50 degrees. Cov txheej txheem kub ntawm cov hlau nplaum yog nyob ntawm qhov loj ntawm qhov vuam, lub zog thiab kev ua haujlwm ntawm cov hlau soldering, hom thiab kab hom solder, thiab nws tsim nyog ntxiv X degrees (feem ntau yog 100) rau saum toj no kub. .
Ntawd yog: soldering hlau taub kub=solder melting point + 50 + X (poob). Piv txwv li: qhov kub ntawm cov hlau lead solder 63/37 yog hais txog 183+50+100=333, thiab cov hlau lead-dawb tin tooj liab yog: 227+50+100=377 degrees.
Vim muaj kev cuam tshuam ntawm cov khoom sib txawv ntawm qhov sib txawv ntawm qhov sib txawv, qhov sib txawv ntawm qhov sib txawv, qhov chaw sib txawv thiab kev ua haujlwm, X hloov tau zoo heev ntawm no, yog li qhov kub ntawm qhov sib txawv ntawm 350-450.
4. Lub hauv paus ntsiab lus ntawm soldering hlau ntsis poob
Lub ntsiab lus ntawm cov hlau taub hau yog roughly: tooj liab-hlau plating txheej-tin plating txheej. Thaum soldering, thaum rhuab, lub cev thiab tshuaj cov tshuaj tiv thaiv yuav tshwm sim ntawm cov hlau plating txheej thiab cov tin nyob rau hauv lub solder, ua rau cov hlau yuav yaj thiab corroded, thiab cov txheej txheem no accelerates raws li qhov kub thiab txias.
Yog li ntawd, thaum lub sij hawm soldering tsis muaj hlau lead, lub soldering kub feem ntau nce thiab cov ntsiab lus tin nyob rau hauv lub solder kuj nce ho, yog li ntawd lub neej ntawm soldering hlau taub yog heev txo.
5. Cov lus nug nquag nug txog kev siv cov hlau lead-dawb phau ntawv soldering
1) Thaum siv qhov kub thiab txias, cov khoom yuav raug puas tsuaj yooj yim;
2) Yog hais tias lub thermal rov qab ntawm cov hlau soldering los yog qhov chaw nres tsheb tsis zoo, cov khoom cuav yuav yooj yim tshwm sim, thiab tus nqi puas yuav nce;
3) oxidation poob ntawm cov hlau taub hau nce;
6. Kev tiv thaiv ib puag ncig rau kev siv cov hlau lead-free phau ntawv soldering
1) Siv cov hlau tsis muaj hlau lead tshwj xeeb (nws tus kheej plated nrog cov hlau tsis muaj hlau lead, thiab cov hlau plating txheej yog tsim nyog thickened kom ncua corrosion thiab ncua lub neej yam tsis muaj kev cuam tshuam thermal conductivity);
2) Siv lub chaw nres tsheb tshwj xeeb uas tsis muaj cov hlau lead (lub zog siab, kev kub ceev rov qab, ua kom qhov kub thiab txias dua, thiab tuaj yeem siv qhov kub tsis tshua muaj zog rau soldering);
7. Kev paub txog qhov chaw nres tsheb tsis muaj txhuas
Nws tuaj yeem pom los ntawm lub hauv paus ntsiab lus welding tias cov txheej txheem vuam tau ua tiav los ntawm kev hloov cov cua sov. Yog li ntawd, cov hlau lead-dawb soldering yuav tsum tau cov cua sov lub cev kom muaj cua sov ua hauj lwm zoo, uas yuav tsum tau lub chaw nres tsheb soldering los yog soldering hlau kom muaj zog ntau dua thiab sai thermal rov qab.
