中碳高硅铸钢的复合热处理工艺  

Duplex Heattreatment of Medium Carbon High-Si Cast Steels

作　　者：宋春梅[1] 许艳东 蔡民[1] 

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154002 [2]佳木斯供水公司,黑龙江佳木斯154002

出　　处：《佳木斯大学学报（自然科学版）》2010年第1期92-94,共3页Journal of Jiamusi University：Natural Science Edition

摘　　要：研究了成分(wt.%)为0.62C,2.0Si,1.6Mn,0.99Cr的高硅铸钢经过复合热处理(球化退火+等温淬火)的组织和力学性能.利用olympus金相电子显微镜观察组织、扫描电子显微镜分析冲击断口形貌;测试了实验钢的洛氏硬度和冲击韧性.实验结果表明,试样经过球化退火工艺之后硬度变化的幅度不大,而冲击韧性有明显地提高,试样的组织主要为下贝氏体组织,并含有少量的奥氏体.在相同的球化退火工艺下,320℃等温淬火60min,试样的硬度和冲击韧性值都较高.The microstructure and properties of high silicon cast steel samples were investigated after isothermal quenching. The chemical composition of samples （ wt. % ） was 0.62C, 2.0Si, 1.6Mn and 0.99Cr. The fracture morphology was analyzed with SEM. The results showed that the hardness of samples after spheroidizing annealing flutuated a little in amplitude and there was clear improvement in impact toughness. The microstructure of samples was mainly lower bainite and a little retained austenite under spheroidizing annealing and 320℃ isothermal quenching for 60 minutes, and the hardness and impact toughness of samples were both high. The process adopted in this experiment was simple and feasible.

关 键 词：高硅铸钢 球化退火 下贝氏体 冲击韧性 

分 类 号：TG142.12[一般工业技术—材料科学与工程]