淬火工艺对110钢级37Mn5厚壁钢管组织性能的影响  

Effect by Quenching Process on Microstructure and Properties of 37Mn5 Heavy-walled Steel Pipe

作　　者：王锦永 张亚彬 陈明义 王付志 陈新和 WANG Jinyong;ZHANG Yabin;CHEN Mingyi;WANG Fuzhi;CHEN Xinhe(Xinxing Ductile Iron Pipes Co.,Ltd.,Handan 056300,China)

机构地区：[1]新兴铸管股份有限公司,河北邯郸056300

出　　处：《钢管》2020年第5期61-64,共4页Steel Pipe

摘　　要：对比分析了浸入内喷方式和外淋内喷方式的淬火工艺对110钢级37Mn5厚壁钢管组织和性能的影响,分析认为:分别提高Mn和Cr含量至1.5%和0.25%,并采用外淋内喷方式,可以减小钢管弯曲,提高钢管性能的稳定性。生产实践表明:37Mn5钢管采用外淋内喷淬火工艺淬火后,网状铁素体消失,奥氏体向马氏体转变充分,回火后获得了均匀致密的回火索氏体组织,力学性能满足技术协议要求。Comparatively analyzed are the effects by the immersion inner water spray quenching process and theouter-showering and inner-spray quenching process on the microstructure and properties of the 11037Mn5 heavy-walledsteel pipe.It is regarded via the analysis that increasing the contents of Mn and Cr of the pipe up to 1.5%and 0.25%respectively,and adopting the outer-showering and inner-spray process will reduce the bend of the pipe,and improve itsproperty stabilit.Relevant production practice shows that thanks to the outer-showering and inner-spray quenching process,the 37Mn5 steel pipe has its reticular ferrite disappeared,and its austenite fully transformed into the martensite,andafter tempered,the pipe has homogeneous and dense tempered sorbite microstructure,and possesses all the mechanicalproperties as satisfying the requirements specified under relevant technical agreement.

关 键 词：37Mn5厚壁钢管 力学性能 调质处理 淬透性 回火索氏体 

分 类 号：TG113.25[金属学及工艺—物理冶金]