回火温度对冶金锯片用钢8CrV组织及性能的影响  

Effect of Tempering Temperature on Microstructure and Mechanical Properties of 8CrV Saw Blade for Metallurgy

作　　者：苑少强[1] 郭继富[2] 韩会杰[2] 梁国俐[1] 

机构地区：[1]唐山学院科研处,河北唐山063000 [2]唐山冶金锯片有限公司,河北唐山063020

出　　处：《热加工工艺》2009年第18期110-112,共3页Hot Working Technology

基　　金：唐山市科学技术研究与发展计划基金资助项目(08160201A-1.1)

摘　　要：采用金相观察、力学性能测试等手段,对经300～460℃连续回火处理的冶金锯片用钢8CrV的组织和性能进行分析。结果显示:随回火温度的升高,其组织由淬火马氏体逐渐转化为回火马氏体、回火马氏体+回火索氏体及回火索氏体;试样的强度连续下降,屈强比略有上升。在420℃左右出现了回火脆性,冲击值、断面收缩率和伸长率发生明显变化,而硬度略有升高。The continuously tempering at 300-460℃ for saw blade made of 8CrV steel was carried out. The microstructure and mechanical properties of 8CrV steel were analyzed using metallographic observation and mechanical measurement. The results show that： with the increase of tempered temperature, the quenched martensite transforms into the tempered martensite, tempered martensite＋tempered sorbite and tempered sorbite; the strength of samples decreases continuously but yield ratio increases a little. At about 420℃, the temper brittleness occurs and obvious properties change happens of the samples, such as impact value, reduction area and elongation. However, the hardness values enhance at this temperature.

关 键 词：8CrV 回火组织 力学性能 

分 类 号：TG156.5[金属学及工艺—热处理]