HEATS 发表于 2010-9-12 14:30:41

不锈钢材料弹簧的热处理

<DIV id=NewsContentLabel><FONT size=3><STRONG>1.奥氏体-不锈弹簧钢</A>的-热处理</A></STRONG><BR><STRONG>(1)固溶处理</STRONG> </FONT>
<DIV align=center><FONT size=3><STRONG>奥氏体不锈弹簧钢固溶处理规范</STRONG> </FONT></DIV>
<DIV align=center> </DIV>
<TABLE id=table3 border=1 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD vAlign=top width=118>
<DIV align=center><FONT size=3>材料牌号 </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>处理温度℃ </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>冷却方式 </FONT></DIV></TD>
<TD vAlign=top width=110>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp; 设备 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top rowSpan=3 width=118>
<DIV align=center><FONT size=3>1Cr18Ni9 </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>棒材:1100~1150 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷 </FONT></DIV></TD>
<TD vAlign=top rowSpan=9 width=110>
<DIV><FONT size=3>1.高温盐炉适用于棒材和厚板材<BR>2.真空油淬炉或真空气淬炉适用于薄板、带材、管材以及小型精密弹性元件 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>板材:1080~1130 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水或油冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>带材:1020~1070 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷,油冷或者气冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top rowSpan=3 width=118>
<DIV align=center><FONT size=3>1Cr18Ni9Ti </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>棒材:1060~1140 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>板材:1050~1130 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水或油 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>带材:1020~1070 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷,油冷或者气冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=118>
<DIV align=center><FONT size=3>0Cr17Ni14Mo2 </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>1020~1120 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷,油冷或者气冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=118>
<DIV align=center><FONT size=3>0Cr18Ni12Mo2Ti </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>1020~1100 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷,油冷或者气冷 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=118>
<DIV align=center><FONT size=3>1Cr18Ni12Mo2Ti </FONT></DIV></TD>
<TD vAlign=top width=138>
<DIV align=center><FONT size=3>1020~1100 </FONT></DIV></TD>
<TD vAlign=top width=153>
<DIV align=center><FONT size=3>水冷,油冷或者气冷 </FONT></DIV></TD></TR></TBODY></TABLE>
<DIV><FONT size=3>&nbsp; </FONT></DIV>
<DIV><STRONG><FONT size=3>(2)稳定回火处理</FONT></STRONG><FONT size=3> </FONT></DIV>
<DIV align=center><FONT size=3>奥氏体不锈-弹簧</A>钢稳定回火处理规范&nbsp; </FONT></DIV>
<TABLE id=table4 border=1 cellSpacing=0 cellPadding=0 width=429>
<TBODY>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>材料牌号 </FONT></DIV></TD>
<TD vAlign=top width=91>
<DIV align=center><FONT size=3>处理温度℃ </FONT></DIV></TD>
<TD vAlign=top width=105>
<DIV align=center><FONT size=3>保温时间(h) </FONT></DIV></TD>
<TD vAlign=top width=80>
<DIV align=center><FONT size=3>设备 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>1Cr18Ni9 </FONT></DIV></TD>
<TD vAlign=top rowSpan=2 width=91>
<DIV align=center><FONT size=3>430~480 </FONT></DIV></TD>
<TD vAlign=top rowSpan=2 width=105>
<DIV align=center><FONT size=3>2h </FONT></DIV></TD>
<TD vAlign=top rowSpan=5 width=80>
<DIV align=center><FONT size=3>真空炉 </FONT></DIV>
<DIV align=center><FONT size=3>或 </FONT></DIV>
<DIV align=center><FONT size=3>时效炉 </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>1Cr18Ni9Ti </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>0Cr17Ni14Mo2 </FONT></DIV></TD>
<TD vAlign=top rowSpan=3 width=91>
<DIV align=center><FONT size=3>380~480 </FONT></DIV></TD>
<TD vAlign=top rowSpan=3 width=105>
<DIV align=center><FONT size=3>2n </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>0Cr18Ni12Mo2Ti </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=143>
<DIV align=center><FONT size=3>1Cr18Ni12Mo2Ti </FONT></DIV></TD></TR>
<TR>
<TD vAlign=top width=425 colSpan=4>
<DIV><FONT size=3>备注:用冷拉强化处理的-钢丝</A>并经冷成性的弹簧,作消应力回火处理的规范见表2 </FONT></DIV></TD></TR></TBODY></TABLE>
<DIV><FONT size=3><STRONG>2.马氏体不锈弹簧钢的热处理</STRONG><BR><STRONG>(1)马氏体不锈弹簧钢的预备热处理</STRONG> 马氏体不锈弹簧钢属于马氏体相变强化钢   </FONT></DIV>
<DIV align=center><FONT size=3>马氏体不锈弹簧钢的预备热处理工艺&nbsp; </FONT></DIV>
<TABLE id=table5 border=1 cellSpacing=0 cellPadding=0 width=638>
<TBODY>
<TR>
<TD rowSpan=2 width=68>
<DIV align=center><FONT size=3>&nbsp;材料牌号 </FONT></DIV></TD>
<TD width=282 colSpan=3>
<DIV align=center><FONT size=3>不完全退火 </FONT></DIV></TD>
<TD width=280 colSpan=3>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 低温退火 </FONT></DIV></TD></TR>
<TR>
<TD width=87>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD width=74>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD>
<TD width=117>
<DIV align=center><FONT size=3>布氏硬度压痕mm </FONT></DIV></TD>
<TD width=84>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD width=74>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>布氏硬度压痕mm </FONT></DIV></TD></TR>
<TR>
<TD width=68>
<DIV align=center><FONT size=3>2Cr13 </FONT></DIV></TD>
<TD rowSpan=3 width=87>
<DIV align=center><FONT size=3>870-900 </FONT></DIV></TD>
<TD rowSpan=3 width=74>
<DIV align=center><FONT size=3>随炉冷却至 600℃后出炉空冷 </FONT></DIV></TD>
<TD width=117>
<DIV align=center><FONT size=3>≥4.4 </FONT></DIV></TD>
<TD width=84>
<DIV align=center><FONT size=3>730~780 </FONT></DIV></TD>
<TD rowSpan=4 width=74>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>≥4.0 </FONT></DIV></TD></TR>
<TR>
<TD width=68>
<DIV align=center><FONT size=3>3Cr13 </FONT></DIV></TD>
<TD width=117>
<DIV align=center><FONT size=3>≥4.2 </FONT></DIV></TD>
<TD width=84>
<DIV align=center><FONT size=3>730~780 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>≥4.0 </FONT></DIV></TD></TR>
<TR>
<TD width=68>
<DIV align=center><FONT size=3>4Cr13 </FONT></DIV></TD>
<TD width=117>
<DIV align=center><FONT size=3>≥4.0 </FONT></DIV></TD>
<TD width=84>
<DIV align=center><FONT size=3>730~780 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>≥4.0 </FONT></DIV></TD></TR>
<TR>
<TD width=68>
<DIV align=center><FONT size=3>1Cr17Ni2 </FONT></DIV></TD>
<TD width=87>
<DIV><FONT size=3>&nbsp; </FONT></DIV></TD>
<TD width=74>
<DIV align=center><FONT size=3>&nbsp; </FONT></DIV></TD>
<TD width=117>
<DIV align=center><FONT size=3>&nbsp; </FONT></DIV></TD>
<TD width=84>
<DIV align=center><FONT size=3>670~690 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>≥3.5 </FONT></DIV></TD></TR></TBODY></TABLE> 
<DIV><FONT size=3>&nbsp; </FONT><STRONG><FONT size=3>(2)马氏体不锈弹簧钢的淬火、回火处理</FONT></STRONG><FONT size=3><B><BR></B>&nbsp; 马氏体不锈弹簧钢制成弹簧后的最终热处理是淬火、回火。 </FONT></DIV>
<DIV align=center><FONT size=3>常用马氏体不锈弹簧钢的最终热处理工艺&nbsp; </FONT></DIV>&nbsp;
<TABLE id=table6 border=1 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>&nbsp;材料牌号 </FONT></DIV></TD>
<TD colSpan=2>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 淬&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 火 </FONT></DIV></TD>
<TD colSpan=2>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 回&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 火 </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>硬度(HRC) </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>2Cr13 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1000~1040 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>油 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>300~480 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD>
<DIV><FONT size=3>&nbsp; </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>3Cr13 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1000~1040 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>油 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>300~480 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>40~46 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>3Cr13Mo </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1020~1060 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>油 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>220~300 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>46~50 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>4cr13 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1000~1050 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>油 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>320~450 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>45~52 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>1cr17Ni2 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1000~1020 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>油 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>340~360 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>&nbsp;&nbsp; </FONT></DIV></TD></TR></TBODY></TABLE><STRONG><FONT size=3>3.沉淀硬化不锈弹簧钢热处理</FONT></STRONG><FONT size=3><BR>&nbsp;&nbsp; 沉淀硬化不锈弹簧钢是通过马氏体相变强化和沉淀析出强化两者综合强化的,所以基本热处理工艺为固溶处理和时效处理。<BR>&nbsp;&nbsp; 对于半奥氏体育型钢,固溶处理后室温得到不稳定的奥氏体,没有完成马氏体转变,没有充分强化,因此在固溶处理和时效处理之间,增加一个调整处理,使得不稳定奥氏体转变为马氏体。常用调正处理有调节处理(T处理)、冷处理(R处理)、塑性处理(C处理)三种方法。   </FONT>
<DIV align=center><FONT size=3>常用沉淀硬化不锈弹簧钢热处理工艺&nbsp; </FONT></DIV> 
<DIV> </DIV>
<TABLE id=table3 border=1 cellSpacing=0 cellPadding=0 width=618>
<TBODY>
<TR>
<TD rowSpan=2 width=64>
<DIV align=center><FONT size=3>类别 </FONT></DIV></TD>
<TD rowSpan=2 width=129>
<DIV align=center><FONT size=3>&nbsp; 材料牌号 </FONT></DIV></TD>
<TD width=150 colSpan=2>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp; 固溶处理 </FONT></DIV></TD>
<TD rowSpan=2 width=118>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp; 调整处理 </FONT></DIV></TD>
<TD width=139 colSpan=2>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp; 时效处理 </FONT></DIV></TD></TR>
<TR>
<TD width=88>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD width=66>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>加热温度℃ </FONT></DIV></TD>
<TD width=40>
<DIV align=center><FONT size=3>冷却介质 </FONT></DIV></TD></TR>
<TR>
<TD rowSpan=9 width=64>
<DIV align=center><FONT size=3>半奥氏体沉淀强化型 </FONT></DIV></TD>
<TD rowSpan=3 width=129>
<DIV align=center><FONT size=3>0Cr17Ni7AI </FONT></DIV></TD>
<TD rowSpan=3 width=88>
<DIV align=center><FONT size=3>1040~1060 </FONT></DIV></TD>
<TD rowSpan=3 width=66>
<DIV align=center><FONT size=3>水或空气 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>750~ 770℃空冷 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>520~550 </FONT></DIV></TD>
<TD rowSpan=3 width=40>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>940~ 960℃空冷&nbsp;&nbsp; -78℃冷处理 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>500~520 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>&nbsp; 冷变形 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>470~490 </FONT></DIV></TD></TR>
<TR>
<TD rowSpan=3 width=129>
<DIV align=center><FONT size=3>0Cr15Ni7Mo2AI </FONT></DIV></TD>
<TD rowSpan=3 width=88>
<DIV align=center><FONT size=3>1050~1080 </FONT></DIV></TD>
<TD rowSpan=3 width=66>
<DIV align=center><FONT size=3>空气或水 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>750~ 770℃空冷 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>520~550 </FONT></DIV></TD>
<TD rowSpan=3 width=40>
<DIV align=center><FONT size=3>&nbsp; 空气 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>940~ 960℃空冷&nbsp;&nbsp; -78℃冷处理 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>500~520 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp; 冷变形 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>470~490 </FONT></DIV></TD></TR>
<TR>
<TD rowSpan=3 width=129>
<DIV align=center><FONT size=3>0Cr12Mn5Ni4Mo3AI </FONT></DIV></TD>
<TD rowSpan=3 width=88>
<DIV align=center><FONT size=3>1040~1060 </FONT></DIV></TD>
<TD rowSpan=3 width=66>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>750~ 770℃空冷 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>450~490 </FONT></DIV></TD>
<TD rowSpan=3 width=40>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>-78℃冷处理 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>510~530 </FONT></DIV>
<DIV align=center><FONT size=3>550~570 </FONT></DIV></TD></TR>
<TR>
<TD width=118>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp; 冷变形 </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>340~360 </FONT></DIV>
<DIV align=center><FONT size=3>510~570 </FONT></DIV>
<DIV align=center><FONT size=3>550~570 </FONT></DIV></TD></TR>
<TR>
<TD width=64>
<DIV align=center><FONT size=3>马氏体沉淀强化型 </FONT></DIV></TD>
<TD width=129>
<DIV align=center><FONT size=3>0Cr17Ni4Cu4Nb </FONT></DIV></TD>
<TD width=88>
<DIV align=center><FONT size=3>1020~1060 </FONT></DIV></TD>
<TD width=66>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD>
<TD width=118>
<DIV align=center><FONT size=3>&nbsp; </FONT></DIV></TD>
<TD width=97>
<DIV align=center><FONT size=3>450~550 </FONT></DIV></TD>
<TD width=40>
<DIV align=center><FONT size=3>空气 </FONT></DIV></TD></TR></TBODY></TABLE>&nbsp;
<DIV><FONT size=3>补充:1.1.1-②消应力回火温度对弹簧力学性能的影响<BR>消应力回火温度对各种材料弹簧力学性能的影响是客观存在的。可以以不同的回火温度对碳素弹簧钢丝、油淬火回火钢丝和1Cr18Ni9弹簧材料力学性能的影响加以说明。见表3、4.、5(上一篇将表5列立成了表3),也可以根据对弹簧的特殊性能要求来确定相应的回火温度。   </FONT></DIV>
<DIV align=center><FONT size=3>回火温度对碳素弹簧钢丝材料弹簧的力学性能的影响&nbsp; </FONT></DIV>&nbsp;
<TABLE id=table4 border=1 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>钢丝直径mm </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>材料供应状态 </FONT></DIV></TD>
<TD colSpan=6>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 各种回火温度处理30分钟后的σ<SUB>b</SUB>,σ<SUB>s</SUB>, </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>(Mpa) </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>100℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>200℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>260℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>300℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>400℃ </FONT></DIV></TD></TR>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>2 </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>冷拉强化 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>σ<SUB>b</SUB> </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1760 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1850 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1850 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1750 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1625 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>σ<SUB>s</SUB> </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1350 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1500 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1600 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1380 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1300 </FONT></DIV></TD></TR></TBODY></TABLE> 
<DIV align=center><FONT size=3>回火温度对油淬火回火钢丝材料弹簧的力学性能的影响&nbsp; </FONT></DIV> 
<TABLE id=table5 border=1 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>钢丝直径mm </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>材料供应状态 </FONT></DIV></TD>
<TD colSpan=6>
<DIV align=center><FONT size=3>各种回火温度处理30分钟后的σ<SUB>b</SUB>,σ<SUB>s</SUB>, </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>(Mpa) </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>100℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>200℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>300℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>400℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>500℃ </FONT></DIV></TD></TR>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>2 </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>冷拉强化 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>σ<SUB>b</SUB> </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1520 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1550 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1600 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1600 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1350 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>σ<SUB>s</SUB> </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1400 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1400 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1400 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1380 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>1200 </FONT></DIV></TD></TR></TBODY></TABLE>
<DIV><FONT size=3>   </FONT></DIV>
<DIV align=center><FONT size=3>回火温度对1Cr18Ni9对弹簧力学性能的影响&nbsp; </FONT></DIV>
<TABLE id=table6 border=1 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center><FONT size=3>钢丝直径mm </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>材料供应状态 </FONT></DIV></TD>
<TD colSpan=5>
<DIV align=center><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 各种回火温度处理1小时后的硬度(HRC) </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>300℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>350℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>400℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>450℃ </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>500℃ </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>4 </FONT></DIV></TD>
<TD rowSpan=2>
<DIV align=center><FONT size=3>冷拉强化 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>46.6 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>48.2 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>48.2 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>48.5 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>47.6 </FONT></DIV></TD></TR>
<TR>
<TD>
<DIV align=center><FONT size=3>6 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>44.0 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>45.5 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>45.1 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>45.3 </FONT></DIV></TD>
<TD>
<DIV align=center><FONT size=3>44.9 </FONT></DIV></TD></TR></TBODY></TABLE></DIV>
               
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