摘要
通过在铁素体球墨铸铁中加入钼元素,研究了钼对其组织和力学性能的影响。结果表明,在730℃下保温4 h,可获得单一铁素体基体和细小石墨球颗粒的双相退火组织,石墨球分布均匀、圆整。钼的加入并不能细化石墨球组织,反而恶化石墨球形态。钼的加入使铁素体球墨铸铁的冲击韧度和伸长率显著降低,不利于高热应力工况下的反复使用。
The effect of molybdenum on microstructure and mechanical properties of ferrite ductile cast iron was investigated. The results show that single ferrite matrix distributed over fine uniform spherical graphite particles can be obtained by annealing with a holding temperature of 730 ℃ and holding time of 4 hours, and the fine spherical graphite becomes uniform and round after annealing. The molybdenum addition causes the coarsening of spherical graphite and worsening the morphology of spherical graphite. And the impact toughness and elongation of ferrite ductile cast iron decrease with addition of molybdenum, which is harmful to its redupticate applications under thermal stress condition.
出处
《铸造技术》
CAS
北大核心
2014年第9期1909-1912,共4页
Foundry Technology
基金
国家自然科学基金资助项目(51031128)
教育部博士点基金资助项目(20120201120005)
中国博士后科学基金资助项目(2012M521767
2013T60875)
陕西省博士后基金资助项目
西安交通大学基本科研业务费自由探索项目(XJJ2013038)
关键词
钼
铁素体球铁
石墨形态
退火
硬度
molybdenum
ferrite ductile cast iron
graphite morphology
annealing
hardness
