RE-Al对含钨高铬铸铁变质效果的试验研究

Effects of Rare Earths and Al Modification Treatment on High Chromium Cast Iron Containing Wolfram

考察了RE,Al对含钨高铬铸铁组织、冲击韧度、硬度、耐磨性等性能的影响。结果表明:铸态未变质的铸铁组织中,奥氏体含量多,碳化物呈粗大板条状分布,晶粒比较粗大;变质后残余奥氏体量明显减少,初生奥氏体显著细化,碳化物由粗大板条状向细板条状、菊花状转变;RE,Al复合变质处理可使铬钨合金白口铸铁的硬度、冲击韧度、耐磨性都得到提高。

The effects of the addition RE and Al on structure, impact toughness, hardness, and wear resistance of high chromium cast iron cotaining wolfram were investigated. The results show that the content of austenite is much and the carbide distributed the thick lath form, the grain size is thicker in high chromium casting iron without modification treatment; the amount of residual austenite obviously reduce and the size of austenite greatly fine agter modification treatment, carbide change from thick lath to fine lath form and chrysanthemum form; the hardness, impact toughness, wear resistance of the high chromium casting iron containing wolfram by RE-Al modification treatment are all improved.