微合金化处理对高碳77B盘条强度的定量影响  

Quantitative Effect of Microalloying Treatment on Strength of High Carbon 77B Wire Rod

作　　者：刘瑞娟[1] 谢玉彬[1] 张军[2] LIU Ruijuan1, XIE Yubin1, ZHANG Jun2(1. School of Mechanical and Electrical Engineering, Hebi College of Vocation and Technology, Hebi 458030, China; 2 School of Materials Science and Engineering, Beijing University of Science and Technology, Beijing 100083, China)

机构地区：[1]鹤壁职业技术学院机电工程学院,河南鹤壁458030 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《铸造技术》2018年第10期2209-2212,共4页Foundry Technology

摘　　要：利用万能试验机、硬度仪和光学显微镜,结合盐浴等温工艺对不同微合金化处理后高碳77B盘条的强化机理进行了研究。结果表明,钒和铬微合金化可以细化珠光体团,减小珠光体片层间距;但钒氮微合金化会使珠光体团边界模糊,渗碳体片形状扭曲,可能恶化材料的塑韧性。等温盐浴后的定量评估得出了V、N、Cr微合金77B钢的强度增量公式。The strengthening mechanism of high carbon 77B wire rods after different microalloying treatments was studied by using universal testing machine, hardness tester and optical microscope, combined with salt bath isothermal process. The results show that the microalloying of V and Cr can refine the pearlitic group and reduce the lamellar of the pearlite. However, the microalloying of vanadium and nitrogen will blur the boundary of pearlite and distort the shape of carburized tablets, which may deteriorate the plasticity of materials. The strength increment formulas of V, N and Cr microalloy 77B steel are obtained by quantitative evaluation after isothermal salt bath.

关 键 词：微合金化 77B盘条 强度定量 

分 类 号：TG113[金属学及工艺—物理冶金]