英国标准奥氏体型和奥氏体-铁素体型承压铸钢的热处理与力学性
<TABLE width=748 border=1><TBODY>
<TR>
<TD rowSpan=2>钢号<SUP>①</SUP></TD>
<TD rowSpan=2>数字牌号</TD>
<TD rowSpan=2>
<P>热处理温度<BR>/℃ <BR></P></TD>
<TD rowSpan=2>铸件<BR>厚度<BR>≤/mm </TD>
<TD colSpan=4>室温力学性能</TD></TR>
<TR>
<TD noWrap>
<P align=center>σ<SUB>b</SUB>/MPa</P></TD>
<TD noWrap>
<P align=center>σ<SUB>1.0</SUB><BR>≥ /MPa</P></TD>
<TD noWrap>
<P align=center>δ<BR>≥(%) </P></TD>
<TD><EM>A </EM><SUB>KV</SUB><SUP>③</SUP> <BR>≥/J</TD></TR>
<TR>
<TD>GX2CrNi19-11</TD>
<TD>1.4309</TD>
<TD>1050～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>210</TD>
<TD>30</TD>
<TD>80<SUP>④</SUP></TD></TR>
<TR>
<TD>GX5CrNi19-11</TD>
<TD>1.4308</TD>
<TD>1050～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>200</TD>
<TD>30</TD>
<TD>60<SUP>④</SUP></TD></TR>
<TR>
<TD>GX5CrNiNb19-11</TD>
<TD>1.4552</TD>
<TD>1050～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>200</TD>
<TD>25</TD>
<TD>40</TD></TR>
<TR>
<TD>GX2CrNiMo19-11-2</TD>
<TD>1.4409</TD>
<TD>1080～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>220</TD>
<TD>30</TD>
<TD>80<SUP>④</SUP></TD></TR>
<TR>
<TD>GX5CrNiMo19-11-2</TD>
<TD>1.4408</TD>
<TD>1080～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>210</TD>
<TD>30</TD>
<TD>60<SUP>④</SUP></TD></TR>
<TR>
<TD>GX5CrNiMoNbN19-11-2</TD>
<TD>1.4581</TD>
<TD>1080～1150</TD>
<TD>150</TD>
<TD>440～640</TD>
<TD>210</TD>
<TD>25</TD>
<TD>40</TD></TR>
<TR>
<TD>GX2CrNiMo28-20-2</TD>
<TD>1.4458</TD>
<TD>1100～1180</TD>
<TD>150</TD>
<TD>430～630</TD>
<TD>190</TD>
<TD>30</TD>
<TD>60<SUP>④</SUP></TD></TR>
<TR>
<TD>GX2CrNiMoN22-5-3</TD>
<TD>1.4470</TD>
<TD>1120～1150<SUP>②</SUP></TD>
<TD>150</TD>
<TD>600～800</TD>
<TD>420</TD>
<TD>20</TD>
<TD>30</TD></TR>
<TR>
<TD>GX2CrNiMoCuN25-6-3-3</TD>
<TD>1.4517</TD>
<TD>1120～1150<SUP>②</SUP></TD>
<TD>150</TD>
<TD>650～850</TD>
<TD>480</TD>
<TD>22</TD>
<TD>50<SUP>④</SUP></TD></TR>
<TR>
<TD>GX2CrNiMoN26-7-4</TD>
<TD>1.4469S</TD>
<TD>1140～1180<SUP>②</SUP></TD>
<TD>150</TD>
<TD>650～850</TD>
<TD>480</TD>
<TD>22</TD>
<TD>50<SUP>④</SUP></TD></TR></TBODY></TABLE>
<P> ① 各钢号的热处理均为固溶水淬处理。</P>
<P> ② 时效硬化的奥氏体型和奥氏体-铁素体型承压铸钢可进行固溶水淬处理。</P>
<P> ③ 表中<EM>A </EM><SUB>KV</SUB>值均为室温测定值。</P>
<P> ④ 经供需双方同意，下列钢号（数字牌号）的低温<EM>A </EM><SUB>KV</SUB>值为：</P>
<P> 1.4517，1.4469的<EM>A </EM><SUB>KV</SUB>值为35J（-70C）</P>
<P> 1.4308，1.4408，1.4458的<EM>A </EM><SUB>KV</SUB>值为60J（-196C）</P>
<P> 1.4309，1.4409的<EM>A </EM><SUB>KV</SUB>值为70J（-196C）</P>
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