本文介绍了对石油钻机用链条的滚子做小能量多次冲击疲劳试验和大能量落锤冲击试验的机理、方法、使用设备、选用参数及试验结果。对试验结果的分析说明,用传统的冷冲成型工艺生产的滚子,随冲击能量的增加,断裂机理从疲劳向脆断转化,因而寿命不长,而用低碳马氏体成型工艺生产的滚子始终保持疲劳断裂,其寿命较长。 This paper introduces the mechanism, method, equipment, parameters and test results of small energy multiple impact fatigue test and big energy drop weight impact test on chain roller of oil drilling rig. The analysis of the test results shows that the rollers produced by the traditional cold-forging process, with the increase of the impact energy, break the mechanism from fatigue to brittle fracture and thus have a short service life, while the low-carbon martensitic forming process Roller always maintain fatigue fracture, its longer life expectancy.