论文部分内容阅读
对冷作模具D2钢进行不同的深冷处理,并进行了显微组织、表面硬度、耐磨性和冲击韧度的测试与分析。结果表明,深冷处理,尤其是淬火回火后再进行深冷处理,有利于促进钢中碳化物的弥散分布,提高表面硬度、耐磨性和冲击韧度;淬火回火后进行-196℃×2 h深冷处理的冷作模具D2钢,其表面硬度较未经深冷处理试样提高5.38%,20℃磨损体积减少68.89%、200℃磨损体积减少77.74%,冲击韧度提高40.80%。
Cold working die D2 steel was subjected to different cryogenic treatment, and the microstructure, surface hardness, wear resistance and impact toughness of the test and analysis. The results show that cryogenic treatment, especially after quenching and tempering, and then cryogenic treatment is conducive to promoting the dispersion of carbides in the steel to improve the surface hardness, wear resistance and impact toughness; after quenching and tempering -196 ℃ × 2 h cryogenic treatment of cold-working die steel D2, the surface hardness of non-cryogenic treatment of samples increased 5.38%, 20 ℃ wear volume decreased 68.89%, 200 ℃ wear volume decreased 77.74%, impact toughness increased 40.80%.