有鉛
焊錫絲hewuqianhanxisishiliangdaleibutongdehanxicailiao，youqianhanxisihewuqianhanxisidequbiezaiyutamendejinshuchengfenbutong，suoyihejinrongdianyebutong，hejinchengfenzuimingxiandebutong，congliangzhedemingchengjiunengzhidao，yigehanqianyigebuhanqian。wuqianhanxisiqishibingbushizhendeyidianqianjinshuyemeiyou，zhishihanqianliangfeichangdi，dadaoguojihuanbaoyaoqiu，suoyicaichengzhiweihuanbaowuqianhanxisi。
有鉛焊錫絲的熔點是183℃，無鉛焊錫絲的熔點較高為227℃左(zuo)右(you)，含(han)鉛(qian)量(liang)的(de)多(duo)少(shao)決(jue)定(ding)了(le)焊(han)錫(xi)絲(si)熔(rong)點(dian)的(de)高(gao)低(di)。除(chu)熔(rong)點(dian)影(ying)響(xiang)焊(han)錫(xi)質(zhi)量(liang)外(wai)，需(xu)配(pei)合(he)焊(han)錫(xi)絲(si)使(shi)用(yong)的(de)助(zhu)焊(han)劑(ji)也(ye)是(shi)影(ying)響(xiang)焊(han)錫(xi)質(zhi)量(liang)的(de)關(guan)鍵(jian)因(yin)素(su)。焊(han)錫(xi)絲(si)熔(rong)化(hua)後(hou)助(zhu)焊(han)劑(ji)決(jue)定(ding)金(jin)屬(shu)的(de)活(huo)性(xing)，如(ru)果(guo)焊(han)錫(xi)絲(si)的(de)熔(rong)點(dian)過(guo)高(gao)，那(na)麼(me)助(zhu)焊(han)劑(ji)的(de)揮(hui)發(fa)速(su)度(du)就(jiu)會(hui)加(jia)快(kuai)，焊(han)錫(xi)絲(si)的(de)流(liu)動(dong)性(xing)也(ye)會(hui)變(bian)得(de)不(bu)強(qiang)，很(hen)容(rong)易(yi)產(chan)生(sheng)錫(xi)尖(jian)、錫xi橋qiao和he拉la絲si等deng不bu良liang影ying響xiang。有you鉛qian焊han錫xi絲si和he無wu鉛qian焊han錫xi絲si的de可ke焊han性xing也ye有you很hen大da不bu同tong，有you鉛qian焊han錫xi絲si相xiang對dui來lai說shuo更geng容rong易yi焊han接jie，隻zhi因yin無wu鉛qian焊han錫xi絲si中zhong錫xi含han量liang相xiang對dui較jiao高gao，進jin行xing焊han接jie操cao作zuo的de時shi間jian也ye會hui拉la長chang。
有you鉛qian焊han錫xi絲si長chang期qi待dai機ji在zai工gong作zuo溫wen度du下xia，會hui在zai烙lao鐵tie頭tou前qian端duan上shang留liu下xia一yi層ceng焦jiao黑hei的de氧yang化hua物wu。而er無wu鉛qian焊han錫xi絲si更geng是shi如ru此ci，這zhe層ceng金jin屬shu氧yang化hua膜mo和he助zhu焊han劑ji在zai高gao溫wen有you氧yang環huan境jing下xia會hui產chan生sheng交jiao互hu作zuo用yong，生sheng成cheng的de氧yang化hua物wu會hui變bian成cheng一yi個ge隔ge層ceng，嚴yan重zhong影ying響xiang到dao烙lao鐵tie頭tou前qian端duan正zheng常chang吃chi錫xi。殘can留liu的de氧yang化hua物wu對dui焊han錫xi質zhi量liang也ye有you重zhong大da影ying響xiang。
