英国标准低温用承压铸钢的热处理与力学性能
<TABLE width=748 border=1><TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center>钢 号</DIV></TD>
<TD rowSpan=2>
<DIV align=center>数字<BR>牌号</DIV></TD>
<TD colSpan=3 height=17>
<DIV align=center>热处理</DIV></TD>
<TD width="6%" rowSpan=2>铸件<BR>厚度<BR>≤/mm <BR></TD>
<TD colSpan=3>室温拉力性能</TD>
<TD colSpan=2>冲击吸引功</TD></TR>
<TR>
<TD width="6%" height=36>代号</TD>
<TD width="11%">
<P>正火或淬火<BR>温度/℃</P></TD>
<TD width="10%">回火温度<BR>/℃</TD>
<TD noWrap>
<P align=center>σ<SUB>b</SUB>/MPa</P></TD>
<TD noWrap>
<P align=center>σ<SUB>s</SUB>≥ <BR>/MPa</P></TD>
<TD noWrap>
<P align=center>δ<BR>≥(%) </P></TD>
<TD>
<DIV align=center>温度<BR>/℃</DIV></TD>
<TD><EM>A </EM><SUB>KV</SUB> <BR>≥/J</TD></TR>
<TR>
<TD>G17Mn5</TD>
<TD>1.1131</TD>
<TD>+QT</TD>
<TD>890~980</TD>
<TD>600~700</TD>
<TD>50</TD>
<TD>450~600</TD>
<TD>240</TD>
<TD>24</TD>
<TD>-40</TD>
<TD>27</TD></TR>
<TR>
<TD rowSpan=2>G20Mn5</TD>
<TD rowSpan=2>1.6220</TD>
<TD rowSpan=2>+N</TD>
<TD>900~980</TD>
<TD>—</TD>
<TD>30</TD>
<TD>480~620</TD>
<TD>300</TD>
<TD>20</TD>
<TD>-30</TD>
<TD>27</TD></TR>
<TR>
<TD>890~940</TD>
<TD>610~660</TD>
<TD>100</TD>
<TD>500~650</TD>
<TD>300</TD>
<TD>22</TD>
<TD>-40</TD>
<TD>27</TD></TR>
<TR>
<TD>G18Mo5</TD>
<TD>1.5422</TD>
<TD>+QT</TD>
<TD>920~980</TD>
<TD>650~730</TD>
<TD>100</TD>
<TD>440~790</TD>
<TD>240</TD>
<TD>23</TD>
<TD>-45</TD>
<TD>27</TD></TR>
<TR>
<TD>G9Ni10</TD>
<TD>1.5636</TD>
<TD>+QT</TD>
<TD>830~890</TD>
<TD>600~650</TD>
<TD>35</TD>
<TD>480~630</TD>
<TD>280</TD>
<TD>24</TD>
<TD>-40</TD>
<TD>27</TD></TR>
<TR>
<TD>G17NiCrMo13-6</TD>
<TD>1.6781</TD>
<TD>+QT</TD>
<TD>890~930</TD>
<TD>600~640</TD>
<TD>200</TD>
<TD>750~900</TD>
<TD>600</TD>
<TD>15</TD>
<TD>-70</TD>
<TD>27</TD></TR>
<TR>
<TD>G9Ni14</TD>
<TD>1.5638</TD>
<TD>+QT</TD>
<TD>820~900</TD>
<TD>590~640</TD>
<TD>35</TD>
<TD>500~650</TD>
<TD>360</TD>
<TD>20</TD>
<TD>-80</TD>
<TD>27</TD></TR>
<TR>
<TD>GX3CrNi13-4</TD>
<TD>1.6982</TD>
<TD>+QT</TD>
<TD>1000~1050</TD>
<TD>670~690+<BR>590~620</TD>
<TD>300</TD>
<TD>700~900</TD>
<TD>500</TD>
<TD>15</TD>
<TD>-120</TD>
<TD>27</TD></TR></TBODY></TABLE>
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