<h1 class="title maintitle" id="" style="margin: 0px 0px 14px; padding: 0px; font-size: 34px; width: 700px; font-family: 'Microsoft YaHei', SimHei, Verdana; line-height: 34px; color: rgb(0, 0, 0); font-weight: 500; z-index: 0; position: relative; overflow: hidden; zoom: 1; clear: right;"> <span class="lemmaTitleH1" style="height: auto; padding: 0px 0px 5px; display: inline;">34CrNiMo6</span></h1> <p> <strong><span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;">&nbsp; &nbsp; &nbsp; 34CrNiMo6合金高强</span><span style="font-family: arial, 宋体, sans-serif; text-indent: 28px; font-size: 0px; line-height: 0px;"><font color="#136ec2">强</font></span><span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;">,因其优良的综合力学性能,广泛用于制造发动机的</span><a href="http://baike.baidu.com/subview/779873/779873.htm" style="text-decoration: none; color: rgb(19, 110, 194); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;" target="_blank">凸轮轴</a><span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;">及连杆等重要零件,加工性较差,属于典型的</span><a href="http://baike.baidu.com/subview/4569375/4569375.htm" style="text-decoration: none; color: rgb(19, 110, 194); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;" target="_blank">难加工材料</a><span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 28px;">.</span></strong></p> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>化学成分：</strong></div> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>C碳 :0.34</strong></div> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>Si硅 :0.25~0.30</strong></div> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>Mn锰 :0.5</strong></div> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>Mo钼 :0.2 Cr铬 :1.5</strong></div> <p> &nbsp;</p> <div class="para" style="color: rgb(51, 51, 51); margin: 15px 0px 5px; text-indent: 2em; line-height: 24px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> <strong>Ni镍 :1.55</strong></div> <div class="para" style="margin: 15px 0px 5px; text-indent: 2em; font-family: arial, 宋体, sans-serif;"> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>力学性能：</strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>34CrNiMo6材料经<a href="http://baike.baidu.com/subview/72146/72146.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">调质处理</a>后,硬度为36～40HRC,<a href="http://baike.baidu.com/subview/52178/52178.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">抗拉强度</a>&sigma;b为1 100 MPa,<a href="http://baike.baidu.com/subview/499391/499391.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">伸长率</a>&delta;为12%,<a href="http://baike.baidu.com/subview/3869092/3869092.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">冲击韧度</a>值&alpha;&kappa;为8kg/cm2</strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>热处理:</strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>34CrNiMo6其<a href="http://baike.baidu.com/subview/891605/891605.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">调质</a>工艺为850 油淬580度<a href="http://baike.baidu.com/subview/145442/14383113.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">回火</a></strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>分类：</strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>①调质结构钢</strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>②表面硬化结构钢</strong></div> <div class="para" style="margin: 15px 0px 5px; text-indent: 2em;"> <strong><font color="#333333"><span style="font-size: 14px; line-height: 24px;">①调质</span></font><font color="#136ec2"><span style="font-size: 0px; line-height: 0px;">，，，，，，，， &nbsp; &nbsp;</span></font><font color="#333333"><span style="font-size: 14px; line-height: 24px;">这类钢的含碳量一般约为0.25%～0.55%，对于既定截面尺寸的结构件，在调质处理（淬火加回火）时，如果沿截面淬透，则力学性能良好，如果淬不透，</span></font><a href="http://baike.baidu.com/subview/1490886/1490886.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">显微组织</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">中出现有自由</span></font><a href="http://baike.baidu.com/subview/7557/7557.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">铁素体</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">，则韧性下降。对具有</span></font><a href="http://baike.baidu.com/subview/543262/543262.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">回火脆性</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">倾向的钢如</span></font><a href="http://baike.baidu.com/subview/1061735/1061735.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">锰钢</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">、</span></font><a href="http://baike.baidu.com/subview/1687185/1687185.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">铬钢</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">、</span></font><a href="http://baike.baidu.com/subview/11775852/12143908.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">镍铬钢</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">等，</span></font><a href="http://baike.baidu.com/subview/145442/14383113.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">回火</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">后应快冷。这类钢的淬火</span></font><a href="http://baike.baidu.com/subview/650865/650865.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">临界直径</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">，随</span></font><a href="http://baike.baidu.com/subview/1220902/1220902.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">晶粒度</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">和合金元素含量的增加而增大，例如，</span></font><a href="http://baike.baidu.com/subview/1979559/1979559.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">40cr</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">和</span></font><a href="http://baike.baidu.com/subview/2384857/2384857.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">35simn</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">钢约为30～40mm，而</span></font><a href="http://baike.baidu.com/subview/3695241/3695241.htm" style="color: rgb(19, 110, 194); font-size: 14px; line-height: 24px; text-decoration: none;" target="_blank">40crnimo</a><font color="#333333"><span style="font-size: 14px; line-height: 24px;">和30crni2mov钢则约为60～100mm，常用于制造承受较大载荷的轴、连杆等结构件。</span></font></strong></div> <div class="para" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; margin: 15px 0px 5px; text-indent: 2em;"> <strong>②表面硬化结构钢用以制造表层坚硬耐磨而心部柔韧的零部件,如<a href="http://baike.baidu.com/view/25045.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">齿轮</a>、轴等。为使零件心部韧性高,钢中含碳量应低，一般在0.12～0.25%，同时还有适量的合金元素，以保证适宜的<a href="http://baike.baidu.com/subview/539552/539552.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">淬透性</a>。氮化钢还需加入易形成氮化物的合金元素（如al、cr、mo等）。<a href="http://baike.baidu.com/subview/72159/72159.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">渗碳</a>或<a href="http://baike.baidu.com/subview/1615065/1615065.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">碳氮共渗</a>钢，经850～950℃渗碳或碳氮共渗后，淬火并在<a href="http://baike.baidu.com/subview/543183/543183.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">低温回火</a>(约200℃)状态下使用。氮化钢经<a href="http://baike.baidu.com/subview/402817/402817.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">氮化处理</a>(480～580℃)，直接使用，不再经淬火与<a href="http://baike.baidu.com/subview/3024709/3024709.htm" style="text-decoration: none; color: rgb(19, 110, 194);" target="_blank">回火处理</a>。</strong></div> </div> <p> &nbsp;</p>