摘要
化学跑合剂加速跑合过程已有一些文献报道，但在化学跑合对表面接触疲劳寿命的影响方面却还未见有关工作公开发表。因此，在总结齿轮跑合技术的基础上，借助于ＪＰ－ＢＤ１５００型接触疲劳试验机，对用化学跑合剂跑合后的试件表面接触疲劳寿命进行了试验研究，并就化学跑合提高表面抗疲劳磨损能力的原因作了考察、分析与探讨，进而提出了试件表面的接触模型。在给定的试验条件下，较软试件表面用化学跑合剂跑合后的接触疲劳寿命比用普通油跑合和用含磨粒跑合剂跑合后的分别高７０．５５％和３５．０１％，较硬试件表面用化学跑合剂跑合后的接触疲劳寿命比用普通油跑合后的高３９．２１％。研究表明，用化学跑合剂跑合后的表面粗糙度大幅度降低，试件表面形成了一些比较平滑的小凸台，使真实接触面积明显增大，局部法向载荷大幅度降低，这有益于减少和延缓疲劳裂纹的萌生与扩展，从而提高了试件表面的抗疲劳磨损的能力。
It has been reported that corrosive running agent can speed up the running-in process,but there are no research works published with regard to the influence of corrosive running-in onsurface contact fatigue life. Based on summarlzing gear running-in technology, the testinvestigation about surface contact fatigue life after running-in with corrosive running agent hasbeen done by using JP-BD 1500 contact fatigue machine, and the reasons for increasing ability ofantifatigue wear of surface has been discussed,and then proceed to make a surface contact model.Under test conditions, the contact fatigue life of softer surface used of corrosive running agent isincreased by 70.55%than using common running oil and by 35.01%than with abrasive gearrunning agent, and the contact fatigue life of the harder surface is incrcased by 39.21%than withcommon running oil.It is shown that surface roughness after running-in used of corrosive runningagent has desce nd largely,and some little plane has been formed between surface so that the realcontact arca in crease obviously and the loeal normal load decreases largely. These decreased anddelayed the fatigue crack propagation and so increase the ability of antifatigue-wear of surface.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1995年第3期243-247,共5页
Tribology
基金
国家自然科学基金
关键词
齿轮
化学跑合剂
接触疲劳
耐磨寿命
gear,running-in,corrosive running agent,eontact fatigue,wear life, surface contact model
