<div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 4140&nbsp;钢材,此钢拥有良好的加工性,加工变形微小,抗疲劳性能相当好,属中等等淬透性钢,4140热处理后有较好的强度和良好的综合力学性能,工艺性好,成材率高.最高使用温度为427摄氏度.4140强度、淬透性高，韧性好，淬火时变形小，高温时有高的蠕变强度和持久强度。用于制造要求较35CrMo钢强度更高和调质截面更大的锻件，如机车牵引用的大齿轮、增压器传动齿轮、后轴、受载荷极大的连杆及弹簧夹，也可用于 2000m以下石油深井钻杆接头与打捞工具，并且可以用于折弯机的模具等。</div> <h3 style="margin: 0px; padding: 0px; outline: 0px; font-size: 18px; width: 942px; height: 31px; background-image: url(http://www.zcwz.com/gonghuo/images/bg3.gif); line-height: 31px; color: rgb(57, 57, 57); font-family: 'Microsoft YaHei', SimHei, Verdana; font-weight: 500; background-repeat: repeat no-repeat;"> <span style="margin: 0px 0px 0px 10px; padding: 0px; outline: 0px; font-size: 18px;">化学成分：</span></h3> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 地区：中国</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 标准：GB/T 3077&mdash;1999</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 碳(C)0.38～0.45</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 硅(Si)0.17～0.37</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> <div style="margin: 0px 0px 3px 20px; padding: 0px; outline: 0px; font-size: 14px; border: 1px solid rgb(224, 224, 224);"> <img alt="提供4140合金结构钢" src="http://h.hiphotos.baidu.com/baike/s%3D220/sign=9140793c0c33874498c5287e610ed937/adaf2edda3cc7cd9ea7413b53901213fb80e9104.jpg" style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; border: none; width: 200px; height: 150px;" /><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 12px; color: rgb(85, 85, 85); font-family: 宋体; line-height: 15px;">提供4140合金结构钢</span></div> 锰(Mn)0.50～0.80</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 磷(P)&le;0.035</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 硫(S)&le;0.035</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 铬(Cr)0.9～1.20</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 镍(Ni)&le;0.30</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 钼(Mo)0.15～0.25</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 铜(Cu)&le;0.30</div> <div style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, 宋体, sans-serif;"> &nbsp;</div> <h2 style="margin: 0px; padding: 0px; outline: 0px; font-size: 24px; color: rgb(0, 0, 0); line-height: 24px; font-family: 'Microsoft YaHei', SimHei, Verdana; font-weight: 500;"> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 16px; line-height: 24px; background-color: rgb(81, 156, 234); color: rgb(255, 255, 255);">2</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 24px; line-height: 24px;">力学性能：</span></h2> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 抗拉强度&nbsp;&sigma;b (MPa)：&ge;1080(110) <div style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; border: 1px solid rgb(224, 224, 224);"> <img alt="提供合金结构钢" src="http://b.hiphotos.baidu.com/baike/s%3D220/sign=b58659a7fbedab6470724ac2c737af81/1c950a7b02087bf41b587085f2d3572c11dfcf21.jpg" style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; border: none; width: 200px; height: 150px;" /></div> <div style="margin: 0px auto; padding: 0px; outline: 0px; font-size: 14px;"> <div style="margin: 0px auto; padding: 0px; outline: 0px; font-size: 14px;"> &nbsp;</div> <div style="margin: 0px auto; padding: 0px; outline: 0px; font-size: 14px;"> &nbsp;</div> </div> </div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 屈服强度&nbsp;&sigma;s (MPa)：&ge;930(95)</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 伸长率&nbsp;&delta;5 (%)：&ge;12</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 断面收缩率&nbsp;&psi; (%)：&ge;45</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 冲击功&nbsp;Akv (J)：&ge;63</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 冲击韧性值 &alpha;kv (J/cm2)：&ge;78(8)</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 硬度 ：&le;217HB</div> <div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif;"> 试样尺寸：试样毛坯尺寸为25mm</div>