SiMn复相耐磨铸钢复相热处理组织与性能研究.pdf

∀#3/ 2000 SiMn : 1000- 8365( 2000) 03- 0000- 00 SiM n 蒋业华 周 荣 黎振华 周荣锋 ( , 650093) : 测定了以SiMn 为主合金化元素的耐磨铸钢的 T T T 曲线, 曲线存在明显的海 , 贝氏体转变区域较宽; 根据 TTT 曲线, 研究分析了这种耐磨铸钢在不同工艺条件下等湿淬火复相热处理后组织性能; 结果表明, 等温淬火复 相热处理后所得组织为板条状贝氏体铁素体和奥氏体, 贝氏体铁素体间距随等温温度的升高而变宽, 奥氏体量增 多, 其强度硬度下降, 塑韧性提高 : 贝氏体 耐磨铸钢 复相热处理 组织性能 : TG269 : A A Study of Heattreatment Structure and Properties of Silicon and Manganese Alloyed Antiwear Diphase Cast Steel JIANG Yehua, ZHOU Rong , LI Zhenhua, ZHOU Rongfeng ( Kunming Uni ersity of Science T echnology, Kunming 650093, China) Abstract:This paper first tested the T T T cur e of antiwear cast steel alloyed with silicon and manganese. The cur e has apparent bay area and w ide bainite transmission area. Then, the relation of isothermal heattreatment process, structure and mechanical properties of the cast steel was in estigated, according to the T T T cur e. The structure of heattreatment steel consists of lath bainite ferrite and austenite. T he distance of bainite ferrite phase increases w ith the ele ating of isothermal temperature, as w ell as the amount of austenite. T he strength and hardness of the steel decrease, toughness and plasticity increase w ith the ele ating of isothermal temperature. Key words:Bainite; Antiw ear cast steel; Diphase heattreatment; Structure property B/ MB/ A , [ 1] B/ M B/ A 1 2 : 1 M oB 0. 40% ~ 0. 60% C; , ; 1 1. 50%~ 2. 50% Si; 2. 0% ~ 4. 0% Mn , , 150 kg , 1 500 , [2] , ,