Soldering chaw nres tsheb - qhov sib txawv ntawm cov hlau tsis muaj hlau lead thiab cov nyiaj uas muaj cov hlau:
1. Cov ntsiab lus melting txawv: Vim cov hlau alloys sib txawv, cov ntsiab lus melting kuj txawv. Lub melting point ntawm cov hlau tsis muaj hlau lead yog 217 degrees, thaum lub melting point ntawm lead-free solder hlau yog 227 degrees. Qhov sib txawv yog li 10 degrees.
Qhov thib ob, cov hlau muaj pes tsawg leeg sib txawv: cov hlau tsis muaj hlau lead-dawb hlau yog tsim los ntawm tin-silver-tooj liab alloy, thaum tsis muaj cov hlau lead-dawb solder hlau yog tsim los ntawm tin thiab tooj liab alloy, thiab tsis muaj cov khoom siv hlau.
3. Tus nqi sib txawv: vim yog cov nqi siab ntawm cov hlau hlau, cov nqi ntawm cov hlau tsis muaj hlau lead yog kim dua li cov hlau tsis muaj hlau lead. Qhov no yog qhov zoo tshaj plaws ntawm cov hlau tsis muaj hlau lead. Qhov siab dua cov ntsiab lus nyiaj hauv cov nyiaj tsis muaj hlau lead-dawb solder hlau, nws yuav kim dua.
4. Qhov kev ua tau zoo tag nrho yog qhov sib txawv: vim qhov kev ua ntawm cov hlau tsis muaj hlau, cov hlau tsis muaj hlau lead yog qhov zoo dua thiab muaj zog dua li cov hlau tsis muaj hlau lead, thiab cov pob qij txha muaj zog dua. Qhov thib ob, hluav taws xob conductivity kuj yog ib qho tseem ceeb heev qhia nyob rau hauv cov pob qij txha. Nyiaj yog cov hlau uas muaj hluav taws xob zoo, yog li cov hlau tsis muaj cov hlau lead tsis muaj hlau muaj cov hluav taws xob zoo dua thiab thermal conductivity dua li cov hlau tsis muaj hlau lead. Cov khoom no yog unsurpassed los ntawm cov hlau lead-dawb solder hlau.
5. Cov xim gloss ntawm cov pob qij txha sib txawv: qhov ci ntawm cov hlau tsis muaj hlau lead ua rau muaj qhov ci ci, thiab cov tsos zoo dua. Qhov no kuj yog ib qho ntawm qhov zoo ntawm cov hlau tsis muaj hlau lead, tab sis cov xim glossy ntawm cov sib koom ua ke tsis sawv cev rau kev ua haujlwm ntawm kev sib koom ua ke ntawm nws tus kheej. Cov xim gloss ntawm cov nyiaj uas tsis muaj cov hlau lead-dawb solder hlau solder pob qij txha cuam tshuam qhov ci thiab xim ntawm cov tsos ntawm cov pob qij txha. Txij li cov hlau hlau yog cov hlau npub, tsis yog cov hlau ci, cov pob qij txha ntawm cov hlau tsis muaj hlau lead tsis muaj qhov ci, tab sis npub.
