摘要
针对厂家应用需求,分别对渗碳淬火、渗氮表面硬化齿轮进行了研究。利用金相显微镜和扫描电镜进行了微观组织表征;通过电子探针进行了微观成分分析;运用X-ray衍射仪进行了物相分析;使用显微硬度计测试了硬度;运用摩擦磨损试验机进行了耐磨性评价,探讨了其摩擦磨损机理。结果表明：在530℃温度下渗氮30 h,催化气体渗氮（渗层0.65 mm）比厂家控制氮势渗氮（渗层0.35 mm）获得了更深的氮化层,渗层硬度梯度小,磨损体积为后者的0.34倍（前者分别为0.11 mm^3,后者为0.32 mm^3）,耐磨性明显提高。和渗碳相比,催化渗氮磨损体积为渗碳的0.63倍,耐磨性提高近一倍。另外,渗氮处理温度低,齿轮畸变小,减少了后续磨齿和端面精磨。
Aiming at the manufacturer＇s technical requirements, the stator gears after surface hardening with carburizing-quenching and nitriding were studied. The microstrt, cture was observed by using metaIlographic microscope and scanningelectron microscopy （SEM）. The micro-composition analysis was analyzed by electron probe, and the phase composition wasinvestigated by X-ray diffraction instrument. The hardness was measured by the micro-hardness tester. The wear resistancewas evaluated by the friction abrasion testing machine and the wear mechanisms were discussed. The results show that, whenthe stator gear was nitrided at 530 ~C for 30 h, the depth （0.65 ram） ofnitriding layer prepared by catalytic nitriding is deeperthan that ofnitriding layer （0.35 ram） prepared by controlling the nitrogen potential and the micro-hardness gradient is smaller,the wear volume of the former （0.11 mm3） is 0.34 times of that of the later （0.32 mm3）, the wear resistance is obviouslyimproved. Compared with that of the layer prepared by carburizing, the wear volume of the nitriding layer prepared bycatalytic nitriding is 0.63 times of that of the carburizing layer, and the wear resistance is nearly doubled. Lower nitridingtemperature reduces gear distortion, resulting in reduction of subsequent tooth and end face fine grinding.
作者
陈洋洋
刘前程
刘仲玉
高翔
谢鲲
孙金全
CHEN Yangyang, L1U Qiancheng, LIU Zhongyu, GAO Xiang2, XIE Kun, SUN Jinquan(1. School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China; 2. Branch of Qingdao, China Academy of Machinery Science and Technology, Qingdao 266107, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第4期207-211,共5页
Hot Working Technology
关键词
变速器定子齿轮
硬化齿轮
渗碳
渗氮
耐磨性
stator gear for transmission
hardening gear
carburizing
nitriding
wear resistance
