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.
出处
《热加工工艺》
CSCD
北大核心
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)
关键词
8CrV
回火组织
力学性能
8CrV
tempering microstructure
mechanical properties
