MIG焊-焊接用保护气体的特征
<DIV align=center>焊接用保护气体的特征</DIV><DIV align=center>
<TABLE cellSpacing=0 cellPadding=0 width="90%" border=1>
<TBODY>
<TR>
<TD width=200 colSpan=2>
<DIV align=center><B>保</B><B> </B><B>护</B><B> </B><B>气</B><B> </B><B>体</B><B></B></DIV></TD>
<TD width=100>
<DIV align=center><B>化学性质</B><B></B></DIV></TD>
<TD width=60>
<DIV align=center><B>电位梯度</B><B></B></DIV></TD>
<TD width=60>
<DIV align=center><B>熔滴过渡</B><B></B></DIV></TD>
<TD width=100>
<DIV align=center><B>焊缝熔深和形状</B><B></B></DIV></TD>
<TD width=80>
<DIV align=center><B>电弧稳定性</B><B></B></DIV></TD>
<TD width=140>
<DIV align=center><B>适用焊接方法</B><B></B></DIV></TD>
<TD width=140>
<DIV align=center><B>备</B><B> </B><B>注</B><B></B></DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar</DIV></TD>
<TD width=120>
<DIV> Ar>99.99%</DIV></TD>
<TD width=100>
<DIV> 惰性</DIV></TD>
<TD width=60>
<DIV align=center>低</DIV></TD>
<TD width=60>
<DIV align=center>好</DIV></TD>
<TD width=100>
<DIV> 蘑菇状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>TIG,MIG,等离子弧焊</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+O<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar+O<SUB>2</SUB>0.5-2%</DIV></TD>
<TD width=100>
<DIV> 轻微氧化性</DIV></TD>
<TD width=60>
<DIV align=center>低</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 蘑菇状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>MIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+CO<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar+CO<SUB>2</SUB>5%</DIV></TD>
<TD width=100>
<DIV> 轻微氧化性</DIV></TD>
<TD width=60>
<DIV align=center>低</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 深、扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>MIG</DIV></TD>
<TD width=140>
<DIV align=center>耐热奥氏体钢焊接</DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+CO<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar+CO<SUB>2</SUB>20%</DIV></TD>
<TD width=100>
<DIV> 氧化性</DIV></TD>
<TD width=60>
<DIV align=center>中</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 深、扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>MIG</DIV></TD>
<TD width=140>
<DIV align=center>耐热奥氏体钢焊接</DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+H<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar+H<SUB>2</SUB>1%-15%</DIV></TD>
<TD width=100>
<DIV> 还原性</DIV></TD>
<TD width=60>
<DIV align=center>低/中</DIV></TD>
<TD width=60>
<DIV align=center>-</DIV></TD>
<TD width=100>
<DIV> 深</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>TIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+H<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar+H<SUB>2</SUB>1%-15%</DIV></TD>
<TD width=100>
<DIV> 还原性</DIV></TD>
<TD width=60>
<DIV align=center>低/中</DIV></TD>
<TD width=60>
<DIV align=center>-</DIV></TD>
<TD width=100>
<DIV> 深</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>等离子弧焊</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> He</DIV></TD>
<TD width=120>
<DIV> 99.99%</DIV></TD>
<TD width=100>
<DIV> 惰性</DIV></TD>
<TD width=60>
<DIV align=center>高</DIV></TD>
<TD width=60>
<DIV align=center>-</DIV></TD>
<TD width=100>
<DIV> 扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>TIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> He+Ar</DIV></TD>
<TD width=120>
<DIV> He75%+Ar25%</DIV></TD>
<TD width=100>
<DIV> 惰性</DIV></TD>
<TD width=60>
<DIV align=center>中</DIV></TD>
<TD width=60>
<DIV align=center>-</DIV></TD>
<TD width=100>
<DIV> 深</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>TIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> He+Ar+CO<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> He90%+ar7.5%+CO<SUB>2</SUB>2.5%</DIV></TD>
<TD width=100>
<DIV> 轻微</DIV></TD>
<TD width=60>
<DIV align=center>中</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 深、扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>MIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> He+Ar+CO<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> He90%+ar7.5%+CO<SUB>2</SUB>2.5%</DIV></TD>
<TD width=100>
<DIV> 氧化性</DIV></TD>
<TD width=60>
<DIV align=center>中</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 深、扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>短路过渡</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR>
<TR>
<TD width=80>
<DIV> Ar+CO<SUB>2</SUB>+O<SUB>2</SUB></DIV></TD>
<TD width=120>
<DIV> Ar80%+CO<<SUB>2</SUB>15%+O<SUB>2</SUB>5%</DIV></TD>
<TD width=100>
<DIV> 氧化性</DIV></TD>
<TD width=60>
<DIV align=center>中</DIV></TD>
<TD width=60>
<DIV align=center>良好</DIV></TD>
<TD width=100>
<DIV> 深、扁平状</DIV></TD>
<TD width=80>
<DIV align=center>良好</DIV></TD>
<TD width=140>
<DIV align=center>MIG</DIV></TD>
<TD width=140>
<DIV align=center> </DIV></TD></TR></TBODY></TABLE></DIV>
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