摘要为了提高 15CDV6 钢的强度和韧性,进一步挖掘材料的潜力,所以对钢的热处理 工艺进行研究,以期找到 15CDV6 钢比较合适的热处理工艺。
通过对 15CDV6 钢进行相变点的测试、热处理工艺的试验、洛氏硬度值的测量、 显微组织的分析进一步研究 15CDV6 钢的组织和性能。试验通过控制热处理的温度和 时间,比较不同温度和时间下试样的组织和性能,经过综合对比确定 15CDV6 钢较佳 的热处理工艺。经研究发现:与常规的热处理相比,钢经过循环热处理后机械性能更 加优越。当工件采用 990 ℃循环热处理后在 540 ℃回火 15 分钟效果较好,一方面, 强度和韧性得到了良好的配合,另一方面,各类元素的偏聚和组织均匀度均得到了改 善。84588
15CDV6 钢经 990 ℃循环热处理后在 540℃回火 15 分钟不仅提高了材料的力学性 能,而且可以降低生产的成本,因此对工程应用有一定的指导意义。
毕业论文关键词:循环热处理;15CDV6 钢;马氏体;碳化物
Abstract In order to improve the strength and toughness of 15CDV6 steel, tap the potential of the material further, so the heat treatment of steel was studied, the purpose is to find the suitable heat treatment of 15CDV6 steel。
Testing the transformation point of 15CDV6 steel, doing heat treatment experiments, measuring the Rockwell hardness, and analyzing the organization were to study the organization and properties of 15CDV6 steel further。 The best heat treatment is tested by controlling the heat treatment temperature and time, comparing the comparison and mechanical properties of the sample in different temperature and time, the study found: Compared with the conventional heat treatment, the mechanical properties of the steel is more superior after cycle heat treatment。 It is better when the workpiece is dealt with cyclic
heat treatment at 990 ℃ and tempering at 540 ℃, on the one hand, using cyclic heat
treatment at 990 ℃ and tempering at 540 ℃ enables the strength and toughness of the workpiece to get a good fit, on the other hand, the segregation of elements and the uniformity of organization all have been improved。
15CDV6 steel is dealt with cyclic heat treatment at 990 ℃ and tempering at 540 ℃
not only improve the mechanical properties of materials, but also reduce the cost of production。 Therefore, it is significant in engineering applications。
Keywords: Cylic heat treatment; 15CDV6 steel; martensite; carbide
目 录
第一章 绪论 1
1。1 低合金钢的发展历史 1
1。2 高强钢 2
1。3 合金元素在低碳钢中的作用 2
1。3。1 碳的作用 2
1。3。2 硅的作用 3
1。3。3 锰的作用 3
1。3。4 铬的作用 3
1。3。5 钼的作用 3
1。3。6 镍的作用 4
1。3。7 铝的作用 4
1。3。8 铌的作用 4
1。4 晶粒尺寸与塑性和韧性的关系 4
1。5 细化钢铁材料晶粒的方法 5
1。5。1 形变诱导相变细化晶粒 5
1。5。2 形变热处理细化晶粒 5
1。5。3 合金化细化晶粒 航空用15CDV6钢的组织和性能研究:http://www.youerw.com/cailiao/lunwen_100510.html