摘要
为了减少汽车齿轮的淬火变形,研制了一种新型微变形齿轮钢。用透射电子显微镜对这种钢在空冷状态下的显微组织进行了研究。结果表明,新型微变形齿轮钢在空冷条件下即可获得具有精细结构的无碳化物贝氏体铁素体束状组织,贝氏体铁素体片条、亚片条及亚单元被残留奥氏体膜包围,这种组织使微变形齿轮钢具有良好的强度和韧性,尤其冲击韧性显著提高。由于具有良好的强韧性配合,新型微变形齿轮钢在空冷条件下即可满足汽车齿轮复杂的工况要求。
In order to reduce quench deformed of car gear, a new kind of microdistortion gear steel is developed and its fine microstructure is discussed by SEM. The results show that the tested steel can obtain carbide free bainitic ferritic laths with fine microstructure under air-cooling condition. The bainitic ferritic laths, sublaths and subunits are surrounded by retained austenite, which can insure the gear steel possesses high strength and toughness, the impact toughness has increased remarkably. The good mechanical performance of the steel can meet the service demands of the gear.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第6期45-47,共3页
Journal of Chongqing University
基金
贵州省创新基金资助项目(2002-4015)
关键词
微变形齿轮钢
空冷
贝氏体
精细结构
汽车齿轮
microdistortion gear steel
air cooled
bainitic ferritic
fine microstructure
