铸造2013，Vol.62Issue(7)：607-611,5.
正火处理对破碎铁素体球墨铸铁组织和性能的影响
Effect of Normalizing Treatment on Microstructure and Properties of Broken Ferrite Ductile Iron
赖毅翔 1周秉文 1刘恒乐 2王赛赛 1蔡勇 2贾非 1张国辉 2张兴国1
作者信息
- 1. 大连理工大学材料科学与工程学院,辽宁大连116024
- 2. 辽宁北方曲轴有限公司,辽宁本溪117100
- 折叠
摘要
Abstract
In order to improve the strength and toughness of the ductile iron crankshaft,an incomplete austenitizing normalizing treatment has been carried out on the as-cast ductile iron,and pearlite and dispersed broken ferrite appeared in the matrix of ductile iron.By analyzing the effect of temperature and holding time on the microstructure and mechanical properties of ductile iron,it is found that in the three-phase coexistence region ofaustenite,ferrite and graphite,with the increase of temperature and holding time,the content ofpearlite increases,while that of ferrite decreases after normalizing.At this moment,the strength and hardness of the sample rise and the toughness and plasticity decline to some extent.The crankshaft which was treated in 860-870 ℃ and held in this temperature for 1.5 h has the best comprehensive mechanical properties.关键词
破碎铁素体球铁/正火/热处理/显微组织/力学性能Key words
broken ferrite ductile iron/ normalizing/ heat treatment/ microstructure/ mechanical properties分类
矿业与冶金引用本文复制引用
赖毅翔,周秉文,刘恒乐,王赛赛,蔡勇,贾非,张国辉,张兴国..正火处理对破碎铁素体球墨铸铁组织和性能的影响[J].铸造,2013,62(7):607-611,5.
