耐磨钢球开裂失效分析

Cracking Failure Analysis of Wearable Steel Ball

耐磨钢球是一种用于球磨机中的粉碎介质,用于粉碎球磨机中的物料。某公司使用圆棒生产耐磨钢球时,部分钢球出现开裂。对耐磨钢球开裂试样化学成分、宏观形貌、金相组织、断口形貌进行分析,结果表明,钢球淬火温度过高、冷速过快,致使钢球在淬火过程产生较大内应力,最终造成钢球开裂。

Wearable steel ball is a crushing medium used in the ball mill for crushing the materials.When a company used round bars to produce wearable steel balls,some steel balls cracked.For this,the chemical composition,macroscopic morphology,metallographic structure and fracture morphology of the cracked specimens were analyzed.The results show that the high quenching temperature and the fast cooling rate lead to the internal stress of the steel ball during the quenching process,which finally leads to the crack in the steel ball.