铸造热锻模具钢表面复合强化  

Strengthening of Cast Hot-forging Die Steel by Composited Surface

作　　者：王树奇 [1] 崔向红 [2] 李俊义  谢建华 [1] 

机构地区：[1]江苏大学材料科学与工程学院 [2]吉林大学材料科学与工程学院 [3]长春丰东热处理有限公司

出　　处：《农业机械学报》2005年第11期136-138,共3页Transactions of the Chinese Society for Agricultural Machinery

基　　金：教育部留学回国人员科研启动基金资助项目;江苏大学高级人才启动基金资助项目(项目编号:1283000058)

摘　　要：研究了AlCTi、FeCTi、FeAlCTi体系热爆反应形成的组织和结构,并结合传统的铸造工艺在铸造模具钢表面形成颗粒增强复合层。研究结果表明:20%Fe10%AlCTi是较理想的复合体系,其热爆温度低于30%FeCTi体系,在1200℃热爆反应可充分进行,获得颗粒尺寸为1～2μm的TiC和少量FeAl。铸造过程中热爆形成的表层增强颗粒与钢发生相互扩散,实现了较好的融合,复合层的厚度达4mm,硬度得到提高,并呈梯度分布。The microstructures and textures attained through thermal-explosion of Al-C-Ti,Fe-C-Ti,Fe-Al-C-Ti systems were studied. A particle-reinforced composites layer on the surface of die cast steel was fabricated using the combustion technology combined with the traditional casting process. The results show that 20%Fe - 10%Al-C-Ti is a feasible system for fabricating surface particle-reinforced composites layer with lower thermal explosion temperature than 30% Fe-C-Ti system. Thermal explosion reaction can be fully completed at 1 200℃ for a 20% Fe-10% Al-C-Ti system. TiC particles of 1-2μm in diameter and a few FeAl were attained. A good coherence between steel and reinforced particles was achieved through mutual diffusion of steel liquid and reinforced particle. The wideness of surface composites layer is 4 mm with high hardness and its gradient distribution.

关 键 词：模具 铸钢 表面强化 热爆 

分 类 号：TB331[一般工业技术—材料科学与工程]