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<h1 style="color: rgb(0, 0, 0); text-align: center; font-size: 34px; font-family: 'Microsoft YaHei', SimHei, Verdana; font-weight: 500;"> 40Mn2</h1> <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> <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> <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="font-size: 24px;">40Mn2，合金結構鋼。</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> <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="font-size: 24px;">【主要特性】</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> <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="font-size: 18px;">這是一種中碳調質錳鋼，鋼的強度、塑性和耐磨性都較高，可切削性及熱處理工藝性能亦好，在油中臨界淬透直徑達8.5～23mm，在水中臨界淬透直徑達20～42mm；但存在回火脆性和過熱敏感性，而且淬火時易于開裂。此鋼有白點敏感性，冷變形塑性不高，焊接性差，需要預熱到100～425℃后方可焊接。</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> <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="font-size: 24px;">【應用舉例】</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> <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="font-size: 18px;">一般在調質狀態下使用，可用于制造重負荷條件下工作的零件，如軸、曲軸、車軸、活塞桿、蝸桿、杠桿、連桿、有負荷的螺栓、螺釘、加固環、彈簧以及其它調質件。一般用于直徑小于50mm的小截面重要零件時，這種鋼的靜強度及疲勞性能均與40Cr鋼相當，故可作40Cr的代用鋼。</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> <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="font-size: 24px;">【化學成分】（質量分數）（%）</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> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">錳Mn：1.40～1.80</span></div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">磷 P：《0.030 （殘留含量）</span></div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">硫 S：《0.030 （殘留含量）</span></div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">鉻 Cr：&le;0.30 (殘留含量)</span></div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">鎳 Ni：&le;0.30 （殘留含量）</span></div> <div style="word-wrap: break-word; color: rgb(51, 51, 51); margin: 15px 0px 5px; font-family: arial, 宋體, sans-serif; font-size: 14px;"> <span style="font-size: 18px;">銅 Cu：&le;0.25 （殘留含量）</span></div>