铸造2017，Vol.66Issue(6)：598-602,5.
Cr对马氏体球墨铸铁磨球组织和性能的影响
Effect of Elemental Cr on Microstructure and Properties of Martensitic Ductile Iron Grinding Ball
胡小锋 1闫德胜 1喻传宏 2覃照成 2戎利建1
作者信息
- 1. 中国科学院金属研究所,中国科学院核用材料与安全评价重点实验室,辽宁 沈阳110016
- 2. 安徽省宁国诚信耐磨材料有限公司,安徽 宁国 242300
- 折叠
摘要
Abstract
The microstructure and hardness for a martensitic ductile iron grinding ball (Φ110mm) with two different Cr content was investigated. The results shown that in surface layer of grinding ball there are mainly martensite and graphite. However, in spite of graphite and a small amount of ferrite there consist of mainly lamellar pearlite in core region for grinding ball without Cr content. After addition of 0.4% Cr, the core of grinding ball is mainly composed of martensite and contain a small amount of carbides. Hardness test results show that the hardness of the surface layer of non-Cr grinding ball is about HRC50 and the hardness of core is HRC30, which implies that the difference between surface and core hardness is HRC20. After addition of Cr, the surface hardness of grinding ball increases to HRC59 and the difference between surface and core hardness is only HRC3. Compared with high chromium casting iron grinding ball, the Cr-containing martensitic ductile iron grinding ball has better comprehensive performance and has better application prospect in the larger impact environment.关键词
马氏体球墨铸铁/磨球/Cr/碳化物/硬度Key words
martensitic ductile iron/grinding ball/Cr/carbide/hardness分类
矿业与冶金引用本文复制引用
胡小锋,闫德胜,喻传宏,覃照成,戎利建..Cr对马氏体球墨铸铁磨球组织和性能的影响[J].铸造,2017,66(6):598-602,5.
