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在进行T型接头的CO_2气体保获焊时,由于在平焊位置难以施焊,一般都将其置于横焊位置进行焊接。尽管如此也常产生未焊透。这往往是由于焊接电流低、坡口形状不合理、焊丝摆动不当等原因造成的。因此为防止产生未焊透缺陷应注意以下事项:①在焊接中等厚度以上的板材时,应选用高档焊接电流(250安以上);②应选用比平焊时略高4～5伏的电弧电压;③坡口角度不能过小,否则将因母材的熔融不良而造成未熔合及未焊透。为确定在正常横焊条件下,焊接T型接头
In the T-joint CO 2 gas welding, due to the flat welding position is difficult to welding, generally placed in the horizontal welding position welding. In spite of this, impermeability often occurs. This is often due to low welding current, groove shape is irrational, improper wire swing caused by other reasons. Therefore, in order to prevent the occurrence of impermeable defects should pay attention to the following: (1) in the welding of medium thickness above the plate, the welding current should be used high-grade (250 A and above); ② should be slightly higher than the welding 4 to 5 volts arc voltage ; ③ bevel angle can not be too small, otherwise it will be due to poor melting of the base metal caused by the lack of fusion and penetration. To determine the normal cross-welding conditions, welding T-joints