论文部分内容阅读
前言近年来,随着石油化工和化学工业的迅速发展,氢对金属材料的破坏作用引起了广泛的重视.而钢的抗氢腐蚀性能与钢中碳化物的类型有直接的关系.本文拟找出在鞍钢钢研所研制的抗氢钢“12 SiMoVNb”中碳化物的类型及数量与热处理工艺之间的关系,以便能获得最佳综合抗氢性能的热处理工艺.经总结两批试样的实验结果,确定了钢中碳化物主要以M_4 C_3〔(V_(0.62)Mo_(0.38))_4 C_3〕和M C〔(Nb_(0.71)Mo_(0.29))C〕的形式存在.并证实了在回火温度达到650°C时M_4 C_3大量析出、Fe_3 C则完全分解,MC的含量和热处理工艺无关.
Preface In recent years, with the rapid development of petrochemical and chemical industry, the damaging effect of hydrogen on metallic materials has drawn more and more attention, while the resistance to hydrogen corrosion of steel has a direct relationship with the type of carbides in steel. Based on the relationship between the type and amount of carbides in heat resistant steel “12 SiMoVNb” developed by Ansteel Steel Research Institute and the heat treatment process so as to obtain the best heat treatment process with comprehensive hydrogen resistance performance, The results show that the carbides in the steel are mainly in the form of M_4C_3 [(V_ (0.62) Mo_ (0.38)) _4C_3] and MC [(Nb_ (0.71) Mo_ (0.29)) C] When the tempering temperature reached 650 ° C, a large amount of M_4 C_3 was precipitated, while Fe_3 C was completely decomposed. The content of MC was not related to the heat treatment process.