CO2氣(qi)(qi)(qi)體(ti)(ti)保護焊(han)氣(qi)(qi)(qi)孔的(de)(de)產生，主要來(lai)自CO2氣(qi)(qi)(qi)體(ti)(ti)高溫下分解的(de)(de)CO氣(qi)(qi)(qi)體(ti)(ti)，以及CO氣(qi)(qi)(qi)體(ti)(ti)純度(du)不(bu)高而含有一(yi)定量的(de)(de)空氣(qi)(qi)(qi)，還有空氣(qi)(qi)(qi)中(zhong)的(de)(de)氮氣(qi)(qi)(qi)溶于熔(rong)池金屬。這些氣(qi)(qi)(qi)體(ti)(ti)在(zai)熔(rong)池凝固前未充(chong)分逸(yi)出，冷卻(que)后(hou)殘留在(zai)焊(han)縫中(zhong)形成的(de)(de)空穴，沂水焊(han)工培訓(xun)，就是所謂氣(qi)(qi)(qi)孔。

　現在克服產生(sheng)氣(qi)孔(kong)的(de)(de)(de)(de)方法也很多，首(shou)先(xian)，選用(yong)還原成(cheng)分較高的(de)(de)(de)(de)高硅(gui)、高錳焊(han)(han)絲，通過焊(han)(han)接(jie)過程(cheng)所進行的(de)(de)(de)(de)冶金反映，降(jiang)低(di)(di)CO氣(qi)體(ti)的(de)(de)(de)(de)含量，從而減(jian)少氣(qi)孔(kong)的(de)(de)(de)(de)產生(sheng)。其次(ci)，制定正確的(de)(de)(de)(de)焊(han)(han)接(jie)規范，合理(li)焊(han)(han)作，可以(yi)使(shi)氣(qi)體(ti)充分逸出(chu)熔池。再次(ci)，避免在有風的(de)(de)(de)(de)環(huan)境下焊(han)(han)接(jie)（風會(hui)降(jiang)低(di)(di)CO2氣(qi)體(ti)的(de)(de)(de)(de)保護(hu)作用(yong)），壓力容(rong)器的(de)(de)(de)(de)制造基本上都是在廠(chang)房(fang)內(nei)完成(cheng)，免費培(pei)訓(xun)焊(han)(han)工電工，因此完全可以(yi)避免。

?進行(xing)躺(tang)焊(han)(han)(han)(han)時，工(gong)(gong)(gong)件(jian)的放(fang)置(zhi)應保證焊(han)(han)(han)(han)縫位于平焊(han)(han)(han)(han)位置(zhi)。將焊(han)(han)(han)(han)條(tiao)放(fang)置(zhi)在焊(han)(han)(han)(han)道(dao)上，電(dian)(dian)(dian)(dian)工(gong)(gong)(gong)焊(han)(han)(han)(han)工(gong)(gong)(gong)培(pei)訓(xun)找哪(na)家，并利用(yong)(yong)固(gu)定條(tiao)將焊(han)(han)(han)(han)條(tiao)固(gu)定。通過(guo)將焊(han)(han)(han)(han)條(tiao)引弧(hu)(hu)端與(yu)工(gong)(gong)(gong)件(jian)短(duan)路來引燃電(dian)(dian)(dian)(dian)弧(hu)(hu)，電(dian)(dian)(dian)(dian)弧(hu)(hu)長度(du)取(qu)決于藥皮厚度(du)、電(dian)(dian)(dian)(dian)弧(hu)(hu)沿著焊(han)(han)(han)(han)條(tiao)行(xing)走(zou)時，焊(han)(han)(han)(han)條(tiao)不斷熔化并在其下(xia)面形成熔敷金屬。一旦電(dian)(dian)(dian)(dian)弧(hu)(hu)引燃，焊(han)(han)(han)(han)接過(guo)程(cheng)就自(zi)動(dong)進行(xing)。焊(han)(han)(han)(han)條(tiao)的長度(du)可達39in（1000mm），鉗(qian)工(gong)(gong)(gong)焊(han)(han)(han)(han)工(gong)(gong)(gong)電(dian)(dian)(dian)(dian)工(gong)(gong)(gong)培(pei)訓(xun)班，焊(han)(han)(han)(han)條(tiao)鋼芯(xin)直徑有5mm、6mm、7mmm和8mm等(deng)幾種規格。既可采(cai)用(yong)(yong)直流電(dian)(dian)(dian)(dian)弧(hu)(hu)也可采(cai)用(yong)(yong)交流電(dian)(dian)(dian)(dian)弧(hu)(hu)，由于交流電(dian)(dian)(dian)(dian)弧(hu)(hu)的磁偏吹較小，因此(ci)優先選(xuan)用(yong)(yong)交流電(dian)(dian)(dian)(dian)弧(hu)(hu)。焊(han)(han)(han)(han)縫質(zhi)量與(yu)手(shou)工(gong)(gong)(gong)電(dian)(dian)(dian)(dian)弧(hu)(hu)焊(han)(han)(han)(han)相(xiang)當(dang)。一名焊(han)(han)(han)(han)工(gong)(gong)(gong)可同時焊(han)(han)(han)(han)接多(duo)道(dao)躺(tang)焊(han)(han)(han)(han)焊(han)(han)(han)(han)縫。但(dan)這種方法目前(qian)已很(hen)少使用(yong)(yong)。

焊工培訓：

?幾乎(hu)各種焊(han)(han)(han)(han)接(jie)方(fang)法(fa)(fa)(fa)都可(ke)以用(yong)(yong)(yong)于焊(han)(han)(han)(han)接(jie)鋁(lv)(lv)及(ji)鋁(lv)(lv)合(he)(he)金，但是鋁(lv)(lv)及(ji)鋁(lv)(lv)合(he)(he)金對各種焊(han)(han)(han)(han)接(jie)方(fang)法(fa)(fa)(fa)的(de)適應(ying)性不同，各種焊(han)(han)(han)(han)接(jie)方(fang)法(fa)(fa)(fa)有其各自的(de)應(ying)用(yong)(yong)(yong)場合(he)(he)。氣(qi)(qi)焊(han)(han)(han)(han)和(he)焊(han)(han)(han)(han)條(tiao)電弧焊(han)(han)(han)(han)方(fang)法(fa)(fa)(fa)，設備簡單、操作方(fang)便。氣(qi)(qi)焊(han)(han)(han)(han)可(ke)用(yong)(yong)(yong)于對焊(han)(han)(han)(han)接(jie)質(zhi)量要求不高的(de)鋁(lv)(lv)薄(bo)板及(ji)鑄(zhu)件的(de)補焊(han)(han)(han)(han)。焊(han)(han)(han)(han)條(tiao)電弧焊(han)(han)(han)(han)可(ke)用(yong)(yong)(yong)于鋁(lv)(lv)合(he)(he)金鑄(zhu)件的(de)補焊(han)(han)(han)(han)。惰性氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)(TIG或(huo)MIG)方(fang)法(fa)(fa)(fa)是應(ying)用(yong)(yong)(yong)廣泛(fan)的(de)鋁(lv)(lv)及(ji)鋁(lv)(lv)合(he)(he)金焊(han)(han)(han)(han)接(jie)方(fang)法(fa)(fa)(fa)。鋁(lv)(lv)及(ji)鋁(lv)(lv)合(he)(he)金薄(bo)板可(ke)采(cai)用(yong)(yong)(yong)鎢(wu)極(ji)(ji)(ji)交流(liu)弧焊(han)(han)(han)(han)或(huo)鎢(wu)極(ji)(ji)(ji)脈(mo)沖(chong)(chong)弧焊(han)(han)(han)(han)。鋁(lv)(lv)及(ji)鋁(lv)(lv)合(he)(he)金厚(hou)板可(ke)采(cai)用(yong)(yong)(yong)鎢(wu)極(ji)(ji)(ji)氦弧焊(han)(han)(han)(han)、氦混合(he)(he)鎢(wu)極(ji)(ji)(ji)氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)、熔化(hua)(hua)極(ji)(ji)(ji)氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)、脈(mo)沖(chong)(chong)熔化(hua)(hua)極(ji)(ji)(ji)氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)。熔化(hua)(hua)極(ji)(ji)(ji)氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)、脈(mo)沖(chong)(chong)熔化(hua)(hua)極(ji)(ji)(ji)氣(qi)(qi)體(ti)保(bao)護(hu)(hu)(hu)焊(han)(han)(han)(han)應(ying)用(yong)(yong)(yong)越(yue)來越(yue)廣泛(fan)(氣(qi)(qi)或(huo)/氦混合(he)(he)氣(qi)(qi))。