摘要
研究了一种新型热作模具钢5Cr8Mo Ni2Si V的热力学相变规律和CCT曲线,为改善该钢铸态组织的严重偏析和提高材料切削性能,分析普通常规退火、正火+球化退火和正火+等温球化退火3种预处理工艺对该钢组织和性能的影响。结果表明:试验钢经1090℃×1 h正火+880℃×2 h+680℃×48 h等温球化预处理,能显著改善碳化物偏析,并使硬度大大降低,改善切削性能。
The thermodynamic equilibrium phase diagram and CCT curves of the new type hot-work die steel 5Cr8 Mo Ni2Si V were studied to improve the serious segregation of the steel＇s as-cast microstructure and improve its cutting performance. By use of the pretreatment processes,including conventinal annealing,normalizing ＋ spheroidizing annealing and normalizing ＋ isothermal spheroidizing annealing the mcirostructure and performance were analyzed. The results show that after 1090 ℃ normalizing for 1 h ＋ 880 ℃ heating for 2 h following furnace cooling to 680 ℃ and holding for 48 h,the segregation of the steel is improved significantly and the hardness is greatly reduced so that the cutting performance can be improved.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第1期29-34,共6页
Heat Treatment of Metals
基金
哈尔滨市科技成果转化项目(2013DB4AG009)
