锻造磨球组织细化及韧性提升的研究  

Study on Microstructure Refinement and Toughness Improvement of Forging Grinding Ball

作　　者：张天文 ZHANG Tianwen(Iraeta Energy Equipment Co.,Ltd.,Zhangqiu 250200,China)

机构地区：[1]伊莱特能源装备股份有限公司,山东章丘250200

出　　处：《金属材料与冶金工程》2021年第5期12-16,共5页Metal Materials and Metallurgy Engineering

摘　　要：本文通过改变锻造磨球的加热温度以及增加预冷处理工艺,研究了B3材质125 mm磨球组织细化及冲击韧性提升的方法,分析了加热温度、高温形变以及预冷处理对磨球组织及性能的影响,并探讨了显微组织和晶粒尺寸对性能的影响机理。结果表明,细化磨球的晶粒及组织是提高韧性的一条有效途径,当加热温度由1100℃降为960℃时,磨球的晶粒尺寸减小,而冲击韧性提高。磨球成形后进行预冷处理,可减小磨球1/2R处晶粒尺寸,细化淬火马氏体组织,提高冲击韧性。By changing the heating temperature of the forging grinding ball and adding the precooling treatment technology,this paper studiesthe method ofmicrostructure refinement and impact toughness enhancement of grinding ball.It analyses the heating temperature,high temperature deformation,and the effects of the precooling treatment on the grinding ball organization and performance.It discusses the influence mechanism on properties of microstructure and grain size.The results show that the refinement of grain and microstructure of the grinding ball is an effective way to improve toughness.When the heating temperature decreases from 1100℃to 960℃,the grain size of the ball will decrease,while the impact toughness will increase.The precooling treatment after grinding ball forming can reduce the grain size at 1/2 r and refine the quenched martensite structure.The impact toughness also will be improved.

关 键 词：锻造磨球 预冷处理 高温形变 晶粒尺寸 冲击韧性 

分 类 号：TG142.72[一般工业技术—材料科学与工程]