表面感应淬火对45钢滚动磨损特性的影响

Effect of induction hardening on rolling wear properties of 45 steel

针对传统热处理后45钢耐磨性较低的缺点,研究了正火+表面感应淬火热处理后45钢相对ZG31Mn2Si摩擦副的滚动磨损特性和磨损机理。测试了试验载荷、材料硬度与磨损失重的关系,采用扫描电镜分析了感应淬火热处理后不同硬度45钢的磨损形貌及变化规律。结果表明:当载荷恒定,磨料硬度Ha大于被磨材料45钢硬度Hm时,45钢随着感应淬火后自身硬度的提高,耐磨性明显提高,为硬磨料磨损;Ha<Hm时,随着材料硬度的提高,磨损量变化很小,为软磨料磨损;其滚动磨损机理随着表面感应淬火后硬度的升高由塑变磨损转变为犁沟磨损。

By conventional heat treatment 45 steel has poor wear resistance, so the induction hardening treatment was used to improve its wear resistance. The wear characteristics and wear mechanism of compacted 45 steel in rolling against ZG31Mn2Si steel were studied. The wearing loss mass of 45 steel with different hardness was determined by wearing tests at different loads. The evolution of worn morphology of 45 steel with different hardness was observed by SEM. The results show that with the increasing of hardness of 45 steel, its wearing resistance increases considerably when hardness of abrasive（ Ha ） is higher than hardness of 45 steel（ Hm ）, however, it varys very slowly for Ha 〈 Hm. The wear mechanism changes from plastic deformation wear to ploughing wear as the hardness of 45 steel increases.