等温淬火球墨铸铁的合金元素
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<TR>
<TD vAlign=top width=72>
<P><STRONG>铸件壁厚／㎜</STRONG></P></TD>
<TD vAlign=top width=60>
<P>8</P></TD>
<TD vAlign=top width=96>
<P>10</P></TD>
<TD vAlign=top width=117>
<P>25</P></TD>
<TD vAlign=top width=96>
<P>37</P></TD>
<TD vAlign=top width=87>
<P>50</P></TD>
<TD vAlign=top width=117>
<P>备注</P></TD></TR>
<TR>
<TD vAlign=top width=72>
<P><STRONG>铸态</STRONG></P></TD>
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<P>合金元素用量较多，如壁厚25㎜的试样，铸件达到<SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">σ</SPAN><SUB><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">b</SPAN></SUB>900/MPa、δ3％，需加Mo+Cu+Ni</P></TD>
<TD vAlign=top width=117>
<P>通常余热处理，或中、低温回火</P></TD></TR>
<TR>
<TD vAlign=top width=72>
<P><STRONG>强制空冷</STRONG></P></TD>
<TD vAlign=top width=60>
<P>Mo0.3</P></TD>
<TD vAlign=top width=96>
<P>Mo0.48;Mo0.35+Cu1.0</P></TD>
<TD vAlign=top width=117>
<P>Mo0.3+Cu1.0</P>
<P>Mo0.3+Cu1.5</P></TD>
<TD vAlign=top width=96>
<P>Mo0.7+Cu1.0</P>
<P>Mo0.5+Ni2.0</P>
<P>Mo1+Ni0.6</P></TD>
<TD vAlign=top width=87>
<P>Mo0.5+Ni2.3</P></TD>
<TD vAlign=top width=117>
<P>铸铁成分：C3.3,Si2.4,Mn0.32</P></TD></TR>
<TR>
<TD vAlign=top width=72 rowSpan=2>
<P><STRONG>盐浴等温淬火</STRONG></P></TD>
<TD vAlign=top width=60>
<P>0</P></TD>
<TD vAlign=top width=96>
<P>0</P></TD>
<TD vAlign=top width=117>
<P>Mo0.3</P></TD>
<TD vAlign=top width=96>
<P>Mo0.5;</P>
<P>Mo0.35+Cu1.0</P></TD>
<TD vAlign=top width=87>
<P> </P></TD>
<TD vAlign=top width=117>
<P> </P></TD></TR>
<TR>
<TD vAlign=top width=456 colSpan=5>
<P>壁厚铸件，加Mo,Mo+Cu,Mo+Ni,或Mo+CU+Ni。一般，Mo0.2~0.3,Cu＜1.5,Ni＜3.0</P></TD>
<TD vAlign=top width=117>
<P>Mn宜＜0.3</P></TD></TR></TBODY></TABLE>
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