Cr-N微合金含量和正火对Mn系气瓶用无缝钢管屈服强度的影响  

Effect of Cr-N Microalloy Content and Normalizing on Yield Strength of Seamless Steel Tube for Mn Series Gas Cylinder

作　　者：李诗斌 童立芬 姚忠 李刚 闫庆涛 Li Shibin;Tong Lifen;Yao Zhong;Li Gang;Yan Qingtao(Research and Developrment Department,Chengde Jianlong Special Steel Co Ltd;Hebei Engineering Research Center for Forging Steel,Chengde 067201)

机构地区：[1]承德建龙特殊钢有限公司研发处 [2]河北省锻造用钢工程技术研究中心,承德067201

出　　处：《特殊钢》2020年第2期66-68,共3页Special Steel

摘　　要：常见的医用气瓶、工业气瓶主要材质为37Mn类Mn系气瓶钢。气瓶钢主要采用正火热处理工艺,但正火态37Mn钢材质的气瓶力学性能不稳定,屈服强度及冲击功达不到标准设定要求。通过加入Cr、N等微量元素的微合金化37Mn钢化学成分为/%:0.34~0.38 C,0.20~0.27 Si,1.60~1.70 Mn,0.10~0.20 Cr,0.004 0~0.0090 N,经正火轧制的Φ219 mm×6 mm钢管屈服强度≥530 MPa,抗拉强度≥750 MPa,冲击功≥13.2 J,完全能满足客户使用需求。The main material of common medical and industrial gas cylinders is 37 Mn steel of Mn series.Normalizing treatment is mainly adopted for cylinder steel.However,the mechanical properties of normalized 37 Mn cylinder steel are unstable,and it yield strength and impact energy cannot meet setting in standards.In this paper,by adding Cr and N micro elements,the chemical composition of microalloying 37 Mn steel is/%:0.34~0.38 C,0.20~0.27 Si,1.60~1.70 Mn,0.10~0.20 Cr,0.004 0~0.009 0 N,of normalized rolled Φ219 mm×6 mm steel tube,the yield strength ≥530 MPa,tensile strength ≥750 MPa and impact energy ≥13.2 J,fully meet the needs of customer.

关 键 词：气瓶钢 37Mn钢 Cr-N微合金化 正火 无缝钢管 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156.4[金属学及工艺—金属材料]