摘要
对17Cr2Ni2Mo钢制汽车齿轮试件进行热处理、磨削加工及喷丸强化,借助无损残余应力测量设备与显微硬度测试议测试了各处理工艺下试件表层残余应力与显微硬度。结果表明,常规的渗碳淬火+回火处理工艺可保证较高的表层残余压应力与力学性能,磨削加工会恶化残余应力分布,降低疲劳性能,而喷丸强化则可彻底改变表层原始应力分布状态,有利于提高抗疲劳性能。
Heat treatment, grinding and shot-peening strengthening for automobile gear specimens of 17Cr2Ni2Mo steel were carried out. The residual stresses and micro-hardness of samples surface-layer under the several processes were measured by non-destructive residual stress measuring equipment and microhardness tester. The results show that the traditional carburizing and quenching and tempering can ensure high surface-layer residual compressive stresses and mechanical properties. Grinding will deteriorate the stresses distribution and decrease the fatigue performance. While shot-peening can totally change the initial surface-layer residual stresses distribution, which is favorable to enhance the anti-fatigue performance.
出处
《热加工工艺》
CSCD
北大核心
2016年第4期243-245,共3页
Hot Working Technology
