中锰球铁热处理工艺研究  

A Research on Heat Treatment Process of Medium-Manganese Ductile Iron

作　　者：赵爱民[1] 王晓虎[1] 张丽娟[1] 钟雪友[1] 

机构地区：[1]北京科技大学铸造研究所,北京100083

出　　处：《现代铸铁》2002年第2期16-18,共3页Modern Cast Iron

摘　　要：试验测量了中锰球铁(QTMn8)铸态和不同热处理态的力学性能,观察了其微观组织。结果表明经过合适的热处理后,中锰抗磨球铁的冲击韧度大幅度提高。其αk值是铸态的2～3倍,而硬度稍有下降。在较高温度热处理时,由于组织中出现了网状碳化物,使冲击韧度和硬度都有下降。The mechanical properties of the medium-manganese ductile iron (QTMn8) were tested in as-cast state and in differently heat-treated conditions,and the microstructures were observed.The results showed that after properly heat treated,the impact toughness of the medium wear-resistant ductile iron was largely increased.Its impact toughness was 2～3times of that in the as-cast condition,however its hardness had decreased slightly.Treating at too high temperature caused net carbide appearing in the microstructure,and as a result,both the toughness and hardness decreased.

关 键 词：中锰球铁 球墨铸铁 锰 奥氏体化温度 热处理 

分 类 号：TG164.2[金属学及工艺—热处理]