摘要
本文对不同下贝氏体含量的复相组织轴承钢进行了系统的接触疲劳试验研究,找出了贝氏体量与接触疲劳寿命之间的关系。提出了强韧性综合参量 K 值代表材料的强韧性。证明该参量与疲劳寿命中值和显微组织、硬度及断口形貌参数有良好的对应关系,可用于最佳组织设计。
A series of rolling contact test have been tested for bearing steels with some bainite existed in their microstructures.The relation between the content of bainite and the life of rolling contact fatigue have been found out.A parame-ter K has been suggested and it related with the fatigue life (L_(50)),the appearance of fracture(S),the hardness(HRC)and the microstructure.It will be useful in optimum design of microstructure.
关键词
轴承钢
贝氏体
接触疲劳
bearing steel
bainite
contact fatigue
strength toughness
