40cr合金管热处理工艺介绍

　GANGDERECHULI：SHIJIANGGUTAIGANGCAICAIYONGSHIDANGDEFANGSHIJINXINGJIARE、BAOWENHELENGQUEYIHUODESUOXUZUZHIJIEGOUYUXINGNENGDEGONGYI。RECHULIBUJINKEYONGYUQIANGHUAGANGCAI，TIGAOJIXIELINGJIANDESHIYONGXINGNENG，ERQIEHAIKEYIYONGYUGAISHANGANGCAIDEGONGYIXINGNENG。QIGONGTONGDIANSHI：ZHIGAIBIANNEIBUZUZHIJIEGOU，BUGAIBIANBIAOMIANXINGZHUANGYUCHICUN。

　　热处理40cr合金管工艺能够显著地提高钢的力学性能，增加零件的强度、韧性和使用寿命，提高硬度和耐磨性。所以重要的机器零件和工具都要进行热处理。热处理还可以改善工件的加工工艺性能，从而提高生产率和加工质量。因此，热处理在机械制造工业中起着十分重要的作用。下面以45钢和40Cr钢为例。

中国彩票　　ZAISHENGCHANZHONGJIANGCUIHUOHOUZAIJINXINGGAOWENHUIHUOCHENGWEI“DIAOZHICHULI”，DIAOZHICHULIHOULINGJIANJUYOULIANGHAODEZONGHEJIXIEXINGNENG，GUANGFANYINGYONGYUGEZHONGZHONGYAODEJIEGOULINGJIAN，TEBIESHINEIXIEZAIJIAOBIANFUHEXIAGONGZUODELIANGAN、LUOSHUAN、CHILUNJIZHOULEIDENG。DANBIAOMIANYINGDUJIAODI，BUNAIMO。KEYONGDIAOZHI+BIAOMIANCUIHUOTIGAOLINGJIANBIAOMIANYINGDU。　40CrGANG——HEJINJIEGOUGANG

　　40Cr属于GB3077“合金结构钢”。40cr合金管的含碳量为0.37%～0.44%，比45钢略低，Si、Mn的含量相当，含Cr0.80%～1.10%。在热轧供货的情况下，这1%的Cr基本不起作用，它俩的力学性能大体相当。由于40Cr的价格比45钢贵一半左右，所以出于经济性的考虑能用45钢的就不用40Cr。

中国彩票　　40CrGANGDEDIAOZHICHULI：CrZAIRECHULIZHONGDEZHUYAOZUOYONGSHITIGAOGANGDECUITOUXING。YOUYUCUITOUXINGTIGAO，CUIHUO(HUODIAOZHI)CHULIHOU40CrDEQIANGDU、YINGDU、CHONGJIRENXINGDENGJIXIEXINGNENGYEMINGXIANBI45GANGGAO，DANYESHIYOUYUCUITOUXINGQIANG，ZAICUIHUOSHI40CrDENEIYINGLIYEJIUBI45GANGDA，TONGYANGDETIAOJIANXIA40CrCAILIAODEGONGJIANKAILIEQINGXIANGYEJIUBI45GANGCAILIAODEGONGJIANDA。YINCIWEIBIMIANGONGJIANKAILIE，40CrCUIHUOSHIDADUOXUANYONGDAOREXINGJIAODIDEYOUZUOWEICUIHUOJIEZHI(YOUSHIYEYONGSHUANGYECUIHUOFA，SUHUAJIAOSHUICUIYOULENG)，ER45GANGZEYONGDAOREXINGJIAOGAODESHUIZUOWEICUIHUOJIEZHI。DANGRAN，SHUIHEYOUDEXUANZEYEBUSHIJUEDUIDE，HEGONGJIANDEXINGZHUANGYEYOUMIQIEGUANXI。XINGZHUANGJIANDANDE40CrLINGJIANYEKEYISHIYONGSHUICUI，ERXINGZHUANGFUZADE45GANGLINGJIANYEXUJIUDESHIYONGYOUCUISHENZHIYANYU。

　　40CrGONGJIANDIAOZHIDECUIHUIHUO，GEZHONGCANSHUGONGYIKAPIANDOUYOUGUIDING，WOMENZAISHIJICAOZUOZHONGTIHUISHI：

　　(1)40CrGONGJIANCUIHUOHOUYINGCAIYONGYOULENG，40CrGANGDECUITOUXINGJIAOHAO，ZAIYOUZHONGLENGQUENENGCUIYING，ERQIEGONGJIANDEBIANXING、KAILIEQINGXIANGXIAO。DANSHIXIAOXINGQIYEZAIGONGYOUJINZHANGDEQINGKUANGXIA，DUIXINGZHUANGBUFUZADEGONGJIAN，KEYIZAISHUIZHONGCUIHUO，BINGWEIFAXIANKAILIE，ZHISHICAOZUOZHEYAOPINGJINGYANYANGEZHANGWORUSHUI、CHUSHUIDEWENDU。

中国彩票　　(2)40CrGONGJIANDIAOZHIHOUYINGDURENGRANPIANGAO，DIERCIHUIHUOWENDUJIUYAOZENGJIA20~50℃，BURAN，YINGDUJIANGDIKUNNAN。

　　(3)40CrGONGJIANGAOWENHUIHUOHOU，XINGZHUANGFUZADEZAIYOUZHONGLENGQUE，JIANDANDEZAISHUIZHONGLENGQUE，MUDESHIBIMIANDIERLEIHUIHUOCUIXINGDEYINGXIANG。HUIHUOKUAILENGHOUDEGONGJIAN，BIYAOSHIZAISHIYIXIAOCHUYINGLICHULI。

　　中碳钢热处理40cr合金管后能够达到的最高硬度约为HRC55(HB538)，σb为600～1100MPa。所以在中等强度水平的各种用途中，中碳钢得到最广泛的应用，除作为建筑材料外，还大量用于制造各种机械零件。而中碳钢只要温度够，保温时间够一般都是可能达到这个硬度值的，40cr合金管要是不变形是不可能的事。建议一是有加工余量，然后上磨床加工，二是表面淬火。

中国彩票40crGANGGUAN,40crHEJINGUAN,40crWUFENGGUAN,40crHEJINGANGGUAN,40crWUFENGGANGGUANCHANGJIA、WUFENGGANGGUANJIXIEJIAGONG

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