摘要
研究了固溶处理对10Ni3MnCuAl塑料模具钢的显微组织和力学性能的影响。结果表明:试验钢采用在880℃×12h固溶,油冷+530℃×40h时效的热处理制度下,试验钢可以获得较好的综合力学性能,尤其是冲击吸收能量达到了16.8J,具有优异的韧性。在此热处理工艺下,试验钢得到的组织主要是板条状马氏体、粒状贝氏体和少量的残留奥氏体。采用冷却速度较慢的炉冷将会促进相界碳化物的析出,促进M/A岛的分解,进而显著恶化钢的冲击性能。
Effect of soh,tion treatment on mierostruclure and mechanical properties of the 10Ni3MnCuAI plastic die steel was studied. The results shows that ＇after solution treatment at 880 ℃ for 12 h and subsequent oil cooling, then aging at 530 ℃ for 40 h, the optimized comprehensive mechanical properties of the tested steel can he achieved. After the heat treatment above-mentioned, the impact absorbed energy of the tested steel reaches to 16.8 J, which is the highest value among all the tested steel. Additionally, the microstructure of the tested steel consists of martensite and bainite in shape of lath, arid a small amount of retained attstenite. Furnace cooling, which has lower cooling rate, promotes the precipitation of carbides distributed along phase boundaries and the decomposition of M/A islands, resulting in obvious deterioration of impact property of the tested steel.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第12期185-188,共4页
Heat Treatment of Metals
基金
北京市科委科技成果转移转化项目
