MIG焊接头烧穿和夹渣缺陷原因及防范措施
<P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><STRONG><A href=" http://www.mechnet.com.cn">MIG焊</A>接头烧穿和夹渣缺陷原因及防范措施：</STRONG></FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><STRONG><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体>一、</FONT></SPAN><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体>烧穿：</FONT></SPAN></STRONG></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>1.</SPAN>产生原因：</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑴</SPAN>热输入量过大；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑵</SPAN>坡口加工不当，焊件装配间隙过大；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑶</SPAN>点固焊时焊点间距过大，焊接过程中产生较大的变形量；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"></SPAN><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体>(4)操作姿势不正确。</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>3. </SPAN>防止措施：</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑴</SPAN>适当减小焊接电流、电弧电压，提高焊接速度；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑵</SPAN>加大钝边尺寸，减小根部间隙；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑶</SPAN>适当减小点固焊时焊点间距；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑷</SPAN>焊接过程中，手握焊枪姿势要正确，操作要熟练。</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT color=#000000><STRONG><FONT face=宋体>二</FONT><FONT face=宋体>、夹渣：</FONT></STRONG></FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>1.</SPAN>产生原因：</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑴</SPAN>焊前清理不彻底；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑵</SPAN>焊接电流过大，导致电嘴局部熔化混入熔池而形成夹渣；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑶</SPAN>焊接速度过高。</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>2.</SPAN>防止措施：</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑴</SPAN>加强焊接前的清理工作，多道焊时，每焊完一道同样要进行焊缝清理；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑵</SPAN>在保证熔透的情况下，适当减少焊接电流，大电流焊接时，导电嘴不要压得太低；</FONT></SPAN></P><P style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10.5pt; COLOR: black"><FONT face=宋体><SPAN lang=EN-US>⑶</SPAN>适当降低速度，采用含脱氧剂较高的焊丝，提高电弧电压。</FONT></SPAN><SPAN lang=EN-US style="COLOR: black"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
页:
[1]