不同堆放方式的Cr12MoV冷模具钢脉冲退火后的组织、性能分析.doc

不同堆放方式的Cr12MoV冷模具钢脉冲退火后的组织、性能分析 摘 要 近几年来，我国的模具技术有了很大发展，模具水平有了较大提高。 模具钢按用途一般可分为冷作模具钢、热作模具钢和塑料成型用模具钢三大类。Cr12MoV钢是一种应用广泛的冷作模具钢,具有高硬度、高强度、高耐磨性和淬火变形小等优点，属高碳高铬类莱氏体钢。本次毕业设计以Cr12MoV冷作模具钢作为试验原材料,拟用在等温球化热处理工艺的基础上，不同堆放方式下，加上电脉冲这一新型工艺,以期达到保证良好球状珠光体组织的同时，可以在降低硬度，改善切削加工性能和综合机械性能，又能降低球化退火的加热温度，并缩短冷模具钢球化退火的保温时间,提高热处理效率。 关健词：Cr12MoV,冷作模具钢,不同堆放,球化退火 DIFFERENT FORMS OF Cr12MoV COLD STACKED DIE STEEL PULSE ANNEALED ORGANIZATION, PERFORMANCE ANALYSIS Abstract In recent years, Chinas technology has made significant progress die, die levels have greatly improved. Die Steel by end-use in general can be divided into the cold die steel, hot die steel and plastic molding die steel with three categories. Cr12MoV steel is a widely used cold work die steel with high hardness, high strength, high wear resistance and the advantages of small deformation hardening is a type of high-carbon high-chromium steel ledeburite. The graduation project in order to Cr12MoV cold die steel materials for the pilot scheme, to be used in the ball of isothermal heat treatment process on the basis of the different stacking modes, together with the electrical pulse of this new technology to achieve a good ball to ensure that at the same time pearlite can reduce the hardness and improve the cutting performance and mechanical properties as well as lower spheroidizing heating temperature, and shorten the annealing of cold die steel ball of the holding time to improve the efficiency of heat treatment. Key words: Cr12MoV, Cold Work Die Steel, different stacking, spheroidizing 目 录 1 绪论…………………………………………………………………………………...1 2 Cr12MoV冷模具钢的化学成分及不同堆放方式下脉冲球化退火后的组织性能分析.. …………………………………………………….. …………………………….2 2.1 Cr12MoV冷模具钢的化学成分..………………………………………………..2 2.2 研究Cr12MoV冷模具钢球化退火的主要目的..……………………………….2 2.3 Cr12MoV冷模具钢的常规球化退火工艺..……………………………………..2 3 实验原理及方案准备………………………………………………………………...3 3.1 实验原理………………………………………………………………………...3 3.1.1 退火工艺………………………………………………………………...3 3.1.2 球化退火………………………………………………………………...3 3.2 实验材料…………