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<div style="margin: 15px 0px 5px; padding: 0px; outline: 0px; font-size: 14px; line-height: 24px; color: rgb(51, 51, 51); font-family: arial, 宋體, sans-serif;"> 4140&nbsp;鋼材,此鋼擁有良好的加工性,加工變形微小,抗疲勞性能相當(dāng)好,屬中等等淬透性鋼,4140熱處理后有較好的強(qiáng)度和良好的綜合力學(xué)性能,工藝性好,成材率高.最高使用溫度為427攝氏度.4140強(qiáng)度、淬透性高，韌性好，淬火時(shí)變形小，高溫時(shí)有高的蠕變強(qiáng)度和持久強(qiáng)度。用于制造要求較35CrMo鋼強(qiáng)度更高和調(diào)質(zhì)截面更大的鍛件，如機(jī)車牽引用的大齒輪、增壓器傳動(dòng)齒輪、后軸、受載荷極大的連桿及彈簧夾，也可用于 2000m以下石油深井鉆桿接頭與打撈工具，并且可以用于折彎?rùn)C(jī)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;">化學(xué)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, 宋體, sans-serif;"> 地區(qū)：中國(guó)</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, 宋體, sans-serif;"> 標(biāo)準(zhǔn)：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, 宋體, 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, 宋體, 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, 宋體, 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合金結(jié)構(gòu)鋼" 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: 宋體; line-height: 15px;">提供4140合金結(jié)構(gòu)鋼</span></div> 錳(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, 宋體, 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, 宋體, 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, 宋體, sans-serif;"> 鉻(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, 宋體, sans-serif;"> 鎳(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, 宋體, sans-serif;"> 鉬(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, 宋體, sans-serif;"> 銅(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, 宋體, 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;">力學(xué)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, 宋體, sans-serif;"> 抗拉強(qiáng)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="提供合金結(jié)構(gòu)鋼" 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, 宋體, sans-serif;"> 屈服強(qiáng)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, 宋體, sans-serif;"> 伸長(zhǎng)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, 宋體, sans-serif;"> 斷面收縮率&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, 宋體, sans-serif;"> 沖擊功&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, 宋體, sans-serif;"> 沖擊韌性值 &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, 宋體, 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, 宋體, sans-serif;"> 試樣尺寸：試樣毛坯尺寸為25mm</div>