淬火与回火的保温时间
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<TR align=middle height=10>
<TD class=02ur14>保温时间</TD></TR>
<TR>
<TD></TD></TR></TBODY></TABLE>
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<TD class=blk12 align=middle width=74 bgColor=#fdfbea height=56>工件材料</TD>
<TD class=blk12 align=middle width=70 bgColor=#fdfbea height=56>直径(mm)</TD>
<TD class=blk12 align=middle width=140 bgColor=#fdfbea height=56><600℃<BR>气体介质炉中预热</TD>
<TD class=blk12 align=middle width=181 bgColor=#fdfbea height=56>800～900℃<BR>气体介质炉中加热</TD>
<TD class=blk12 align=middle width=162 bgColor=#fdfbea height=56>750～850℃<BR>盐浴炉中加热或预热</TD>
<TD class=blk12 align=middle width=127 bgColor=#fdfbea height=56>1100～1300℃<BR>盐浴炉中加热</TD></TR>
<TR>
<TD>碳素钢</TD>
<TD>≤50</TD>
<TD>-</TD>
<TD>1.0～1.2</TD>
<TD>0.3～0.4</TD>
<TD>-</TD></TR>
<TR>
<TD>碳素钢</TD>
<TD>>50</TD>
<TD>-</TD>
<TD>1.2～1.5</TD>
<TD>0.4～0.5</TD>
<TD>-</TD></TR>
<TR>
<TD>低合金钢</TD>
<TD>≤50</TD>
<TD>-</TD>
<TD>1.5～1.8</TD>
<TD>0.45～0.5</TD>
<TD>-</TD></TR>
<TR>
<TD>低合金钢</TD>
<TD>>50</TD>
<TD>-</TD>
<TD>-</TD>
<TD>0.5～0.55</TD>
<TD>-</TD></TR>
<TR>
<TD>高合金钢</TD>
<TD>-</TD>
<TD>0.35～0.04</TD>
<TD>-</TD>
<TD>0.3～0.35</TD>
<TD>0.17～0.2</TD></TR>
<TR>
<TD>高速钢</TD>
<TD>-</TD>
<TD>-</TD>
<TD>0.65～0.85</TD>
<TD>0.3～0.35</TD>
<TD>0.16～0.18</TD></TR></TBODY></TABLE><TR align="center" HEIGHT="10"><TD><SPAN class=blk12>工件装炉修正系数:</SPAN></TD> </TR>
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<TD class=blk12 align=middle width=194 bgColor=#fdfbea>工件装炉方式</TD>
<TD class=blk12 align=middle width=176 bgColor=#fdfbea>修正系数</TD>
<TD class=blk12 align=middle width=1 bgColor=#fdfbea> </TD><!--<td width="194" bgcolor="#FDFBEA" class="blk12" align="center">工件装炉方式</td>
<td width="176" bgcolor="#FDFBEA" class="blk12" align="center">修正系数</td> --></TR>
<TR>
<TD> t030111.1</TD>
<TD> 1.0</TD></TR>
<TR>
<TD> t030111.3</TD>
<TD> 2.0</TD></TR>
<TR>
<TD> t030111.5</TD>
<TD> 1.3</TD></TR>
<TR>
<TD> t030111.7</TD>
<TD> 1.0</TD></TR>
<TR>
<TD> t030111.9</TD>
<TD> 4.0</TD></TR>
<TR>
<TD> t030111.11</TD>
<TD> 2.0</TD></TR></TBODY></TABLE></TABLE>
<P class=blk12 align=center> 淬火加热保温时间按下列经验公式计算：t=a*K*D<BR>式中 t——保温时间(min)；<BR> a——保温时间系数(min/mm)；<BR> K——工件装炉方式修正系数；<BR> D——工件有效厚度(mm)。<BR></P>
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