球墨可锻铸铁的化学成分
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<P align=center><STRONG>种类</STRONG></P></TD>
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<P align=center><STRONG>C(%)</STRONG></P></TD>
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<P align=center><STRONG>Si(%)</STRONG></P></TD>
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<P align=center><STRONG>Mn(%)</STRONG></P></TD>
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<P align=center><STRONG>P(%)</STRONG></P></TD>
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<P align=center><STRONG>S(%)</STRONG></P></TD>
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<P align=center><STRONG>Mg,RE(%)</STRONG></P></TD>
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<P align=center><STRONG>应用</STRONG></P></TD></TR>
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<P>低碳球墨可锻铸铁</P>
<P>中碳球墨可锻铸铁</P>
<P>高碳球墨可锻铸铁</P></TD>
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<P>2.0~2.4</P></TD>
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<P> </P>
<P>1.2~2.2</P></TD>
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<P>一般0.1~0.6;铁素体,Mn宜低;珠光体Mn宜高</P></TD>
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<P> </P>
<P><0.1宜<0.08</P></TD>
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<P>可<0.1宜<0.06</P>
<P><0.08</P></TD>
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<P>Mg0.03~0.05</P>
<P>RE0.03~0.06</P></TD>
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<P>采用较少</P></TD></TR>
<TR>
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<P>2.4~2.8</P></TD>
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<P>常用</P></TD></TR>
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<P>2.8~3.2</P></TD>
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<P>薄壁铸件</P></TD></TR>
<TR>
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<P>超高碳球墨可锻铸铁</P></TD>
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<P>3.2~3.6</P></TD>
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<P>1.8~2.2</P></TD>
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<P>0.3~0.6</P></TD>
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<P><0.1宜<0.08</P></TD>
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<P> </P></TD>
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<P>①</P></TD>
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<P>薄壁铸件</P></TD></TR>
<TR>
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<P>奥贝球墨可锻铸铁下贝氏体球墨可锻铸铁</P></TD>
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<P>3左右</P></TD>
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<P>1.8左右</P></TD>
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<P>可放宽到<0.7</P></TD>
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<P>可放宽到<0.1</P></TD>
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<P>S 可放宽;Bi可放宽到0.5</P></TD>
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<P>②</P></TD>
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<P>齿轮、受力零件、抗磨件</P></TD></TR></TBODY></TABLE>
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<UL>
<LI>
<DIV align=left>球化剂REMgSiFe:RE7%,Mg8%,Si40%,加入量1.2%~1.4%. </DIV>
<LI>
<DIV align=left>球化剂REMgSiFe:RE5.7%,Mg9.2%,Si43%,Ca1.4%,加入量1.5%. </DIV></LI></UL></DIV>
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