Dab tsi yog vim li cas vim li cas qhov chaw nres tsheb soldering tsis tag welded?
Nyob rau hauv tus txheej txheem ntawm solder-free solder paste, peb feem ntau pom ib co unsoldered phenomena: solder txuas hniav yog tsim los ntawm cov uas nyob ib sab. Vim li cas thiaj muaj teeb meem li no? Niaj hnub no, solder paste manufacturers yuav qhia rau koj txog:
Feem ntau, solder paste slump tuaj yeem tshwm sim los ntawm ntau yam laj thawj, suav nrog:
1. Lub cub tawg kub nce ceev heev;
2. Lub thixotropy ntawm cov hmoov lead-free solder paste yog qhov tsis zoo los yog cov viscosity rov qab maj mam tom qab shearing;
3. Cov hlau thauj khoom lossis cov ntsiab lus ntawm cov khoom muaj tsawg heev;
4. Lub particle loj faib ntawm cov hmoov yog dav dhau;
5. Qhov nro ntawm qhov flux yog me heev.
Sib nrug los ntawm qhov ua rau ntawm cov khoom siv hluav taws xob poob qis, kuj tseem muaj qee yam tseem ceeb uas ua rau muaj kev tsis zoo:
1. Piv nrog rau qhov chaw nruab nrab ntawm cov pob qij txha, muaj ntau ntawm cov khoom siv tshuaj yaj yeeb;
2. Cov cua kub kub siab dhau lawm;
3. Cov cua kub ceev ntawm cov nplaum nplaum yog nrawm dua li ntawm lub rooj tsav xwm Circuit Court;
4. Lub flux wetting yog ceev heev;
5. Lub vapor siab ntawm cov flux tsawg dhau;
6. Cov ntsiab lus hnyav ntawm cov flux siab dhau lawm;
7. Lub softening point ntawm flux resin yog tsawg heev.
Cov Lus Cim Tshwj Xeeb: Thaum cov hlau lead-dawb muab tshuaj txhuam reflows, nyob rau hauv kev txhawb nqa ntawm qhov nro, lub molten solder yuav tawg, thiab qhov poob ntawm cov solder yuav ua rau qhov teeb meem ntawm unsoldered loj dua. Nyob rau hauv cov ntaub ntawv no, ntau tshaj solder accumulated nyob rau hauv ib tug tej thaj chaw vim solder poob yuav ua rau lub molten solder ntau dhau mus disconnect tau yooj yim.
