锻造锰白口铸铁的组织与性能
Structure and Performance of Forged Mn White Cast Iron
王 宁,黎沃光
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作者单位:湛江市技师学院, 广东工业大学
中文关键字:白口铁; 锻造; 锰
英文关键字:white cast iron; forging; manganese
中文摘要:研究了锻造比、锻造温度和锰含量对锻造锰白口铁组织和性能的影响。结果显示:当锰含量为5-7%,锻造温度低于1040 ºC,锻造比大于40%时,锻造所引起的机械变形将促进马氏体转变,使合金的硬度提高。超出该含Mn量和锻造温度使残余奥氏体量增加,导致硬度下降。冲击韧性随锻造比和Mn含量的增加而提高。高应力磨料磨损的耐磨性随Mn含量的增加而提高。
英文摘要:The effects of Mn content, forging temperature and reduction ratio on the structure and performance of forged white cast irons are studied. The results show that with 5-7wt% Mn content, forging temperature lower than 1040 ºC, reduction ratio larger than 40%, the mechanical deformation due to forging promotes the martensite transformation, leading to the hardness increase. Forging above this Mn content and forging temperature, the amount of residual austenite will increase, causing a decrease of hardness. The impact toughness will increase with the increase of reduction ratio and Mn content. The wear resistance to high stress abrasive wear will increase as the increase of Mn content.