<p style="word-wrap: break-word; margin: 5px 0px; color: rgb(0, 0, 0); font-family: 'sans serif', tahoma, verdana, helvetica; font-size: 12px; line-height: 18px; text-align: center;"> <span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 32px; line-height: 24px;"><strong>4130</strong></span></p> <p style="word-wrap: break-word; margin: 5px 0px; color: rgb(0, 0, 0); font-family: 'sans serif', tahoma, verdana, helvetica; font-size: 12px; line-height: 18px;"> <span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px;">&nbsp; &nbsp; &nbsp; &nbsp;结构钢具有高的强度和韧性，淬透性较高，在油中临界淬透直径15～70mm；钢的热强度性也较好，在500℃以下具有足够的高温强度，但550℃时其强度显著下降；当合金元素在下限时焊接相当好，但接近上限时焊接性中等，并在焊前需预热到175℃以上；钢的可切削性良好，冷变形时塑性中等；热处理时在300～350℃的范围有第一类回火脆性；有形成白点的倾向。</span></p> <p style="word-wrap: break-word; margin: 5px 0px; color: rgb(0, 0, 0); font-family: 'sans serif', tahoma, verdana, helvetica; font-size: 12px; line-height: 18px;"> &nbsp;</p> <h2 style="font-size: 24px; font-family: 'Microsoft YaHei', SimHei, Verdana; font-weight: 500;"> <span style="line-height: 24px;">化学成分</span></h2> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 碳 C ：0.28～0.33</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 硅 Si：0.15～0.35</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 锰 Mn：0.40～0.60 <div style="word-wrap: break-word; border: 1px solid rgb(224, 224, 224); margin: 0px 0px 3px 20px;"> <a data-ke-="" href="http://baike.baidu.com/picture/3926095/3926095/0/8474fbdd063703d076c638c3.html?fr=lemma&amp;ct=single" src="http://baike.baidu.com/picture/3926095/3926095/0/8474fbdd063703d076c638c3.html?fr=lemma&amp;ct=single" target="_blank"><img alt="" data-ke-="" src="http://b.hiphotos.baidu.com/baike/s%3D220/sign=9aed9979f21fbe09185ec4165b600c30/0df431adcbef7609aa103f902edda3cc7cd99ea2.jpg" style="border: 0px; width: 220px; height: 165px;" /></a></div> </div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 硫 S ：允许残余含量&le;0.040</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 磷 P ：允许残余含量&le;0.035</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 铬 Cr：0.80～1.10</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 镍 Ni：允许残余含量&le;0.030</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 铜 Cu：允许残余含量&le;0.030</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 钼 Mo：0.15～0.25</div> <div style="word-wrap: break-word; font-family: arial, 宋体, sans-serif; font-size: 14px;"> &nbsp;</div> <h2 style="font-size: 24px; font-family: 'Microsoft YaHei', SimHei, Verdana; font-weight: 500;"> <span style="line-height: 24px; font-size: 16px; background-color: rgb(81, 156, 234); color: rgb(255, 255, 255);">3</span><span style="line-height: 24px;">力学性能</span></h2> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 抗拉强度 &sigma;b (MPa)：&ge;930(95)屈服强度 &sigma;s (MPa)：&ge;785(80)</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 伸长率 &delta;5 (%)：&ge;12</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 断面收缩率 &psi; (%)：&ge;50</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 冲击功 Akv (J)：&ge;63</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 冲击韧性值 &alpha;kv (J/cm2)：&ge;78(8)</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 硬度 ：&le;229HB</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 试样尺寸：试样毛坯尺寸为25mm</div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋体, sans-serif; font-size: 14px;"> 热处理规范：淬火880℃，水冷、油冷；回火540℃，水冷、油冷。</div> <p> ?</p> <p> &nbsp;</p>