<p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">40Mn2，</span>合金结构钢<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">。</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> &nbsp;</p> <p> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">标准：GB/T 3077-1999</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">【主要特性】</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> &nbsp;</p> <p> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">这是一种中碳调质锰钢，钢的</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">强度</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">、</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">塑性</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">和</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">耐磨性</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">都较高，可切削性及热处理工艺性能亦好，在油中临界淬透直径达8.5～23mm，在水中临界淬透直径达20～42mm；但存在</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">回火脆性</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">和</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">过热敏感性</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">，而且淬火时易于开裂。此钢有白点敏感性，冷变形塑性不高，焊接性差，需要预热到100～425℃后方可焊接。</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">【应用举例】</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> &nbsp;</p> <p> <span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">一般在</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">调质</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">状态下使用，可用于制造重负荷条件下工作的零件，如轴、曲轴、车轴、活塞杆、蜗杆、杠杆、连杆、有负荷的螺栓、螺钉、加固环、弹簧以及其它调质件。一般用于直径小于50mm的小截面重要零件时，这种钢的静强度及</span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">疲劳</span><span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">性能均与40Cr钢相当，故可作40Cr的代用钢。</span><br style="margin: 0px; padding: 0px; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;" /> <br style="margin: 0px; padding: 0px; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;" /> <span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;产品名称：</span><strong style="margin: 0px; padding: 0px; outline: 0px; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">性能40Mn2特性特钢</strong><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;">&nbsp;规格：13产地：抚钢 类型：碳钢</span></p>