机床齿轮常用钢及热处理工艺
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<TD align=middle width="35%" bgColor=#c0c0c0 height=1><STRONG><SPAN style="LINE-HEIGHT: 25px">齿轮工作条件</SPAN></STRONG></TD>
<TD vAlign=center align=middle width="20%" bgColor=#c0c0c0 height=1><STRONG><SPAN style="LINE-HEIGHT: 25px">钢 号</SPAN></STRONG></TD>
<TD align=middle width="32%" bgColor=#c0c0c0 height=1><STRONG><SPAN style="LINE-HEIGHT: 25px">热处理工艺</SPAN></STRONG></TD>
<TD align=middle width="15%" bgColor=#c0c0c0 height=1><STRONG><SPAN style="LINE-HEIGHT: 25px">硬度要求</SPAN></STRONG></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">在低载荷下工作,要求耐磨性高的齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">15(20)</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">900~950℃渗碳,直接淬冷或780~800℃水淬,180~200℃回火。</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">58~63HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">低速(<0.1m/s),低载荷下工作的不重要变速箱齿轮和挂轮架齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">840~860℃正火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">156~217HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">低速(<0.1m/s),低载荷下工作的齿轮(如车床溜板上的齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">820~840℃水淬<BR>500~550℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">200~250HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">中速、中载荷或大载荷下工作(车床变速箱中的次要齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">860~900℃高频感应加热,水淬,350~370℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">40~45HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">速度较大或中等载荷下工作的齿轮,齿部要求较高(钻床变速箱中的次要齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">860~900℃高频感应加热,水淬,380~320℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45~50HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">高速、中等载荷,要求齿面硬度高(磨床砂轮箱齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">860~900℃高频感应加热,水淬,180~200℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">52~58HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">速度不大、中等载荷,断面较大(铣床工作台变速箱齿轮、立车齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">40Cr、 42SiMn</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">840~860℃油淬,600~650℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">200~230HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">中等速度、中等载荷,不大的冲击下工作的高速机床走刀箱、变速箱齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">40Cr 、42SiMn</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">调质后860~880℃高频感应加热,乳化液冷却,280~320℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">45~50HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">高速、高载荷、齿部要求高硬度的齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">40Cr 、 42SiMn</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">调质后860~880℃高频感应加热,乳化液冷却,180~200℃回火</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">50~55HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">高速、中载荷、受冲击、模数<5(机床变速箱齿轮、龙门铣床的电动机齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">20Cr 、20SiMn</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">900~950℃渗碳,直接淬火或800~820℃再加热油淬,180~200℃回火。</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">58~63HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">高速、重载荷受冲击、模数>6的齿轮(如立车上重要的螺旋伞齿轮)</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">20CrMnTi 、20SiMnVB、 12CrNi3</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">900~950℃渗碳,降温至820~850℃淬火,180~200℃回火。</SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">58~63HRC</SPAN></TD></TR>
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<TD width="35%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">在不高载荷下工作的大型齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">50Mn2 、 65Mn</SPAN></TD>
<TD width="32%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px">820~840℃空冷 </SPAN></TD>
<TD width="15%" height=47><SPAN class=text2 style="LINE-HEIGHT: 25px"><241HB</SPAN></TD></TR>
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<TD width="35%" height=48><SPAN class=text2 style="LINE-HEIGHT: 25px">传动精度高,要求具有一定耐磨性的大齿轮</SPAN></TD>
<TD vAlign=center align=middle width="20%" height=48><SPAN class=text2 style="LINE-HEIGHT: 25px">35CrMo</SPAN></TD>
<TD width="32%" height=48><SPAN class=text2 style="LINE-HEIGHT: 25px">850~870℃空冷,600~650℃回火(热处理后精切齿形)</SPAN></TD>
<TD width="15%" height=48><SPAN class=text2 style="LINE-HEIGHT: 25px">255~302HB</SPAN></TD></TR></TBODY></TABLE>
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