复合喷丸强化对PH13 - 8Mo钢旋转弯曲疲劳寿命的影响

华程, 姚兰, 杨屹, 李维, 易吉豪

doi:10.16577/j.issn.1001-1560.2022.0225

材料保护 >

2022 , Vol. 55 >Issue 8: 125 - 129

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0225

工艺探讨

复合喷丸强化对PH13 - 8Mo钢旋转弯曲疲劳寿命的影响

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(1. 成都飞机工业(集团)有限责任公司，四川成都 610092；2. 成都纺织高等专科学校，四川成都 611731)

李维(1981-)，硕士，讲师，主要研究方向为材料及表面热处理，电话：13880698372，E - mail：lico1017@163.com

收稿日期: 2022-02-23

修回日期: 2022-03-28

录用日期: 2022-04-18

网络出版日期: 2023-12-17

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Effect of Composite Shot Peening on the Rotating Bending Fatigue Life of PH13 - 8Mo Steel

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(1. Chengdu Aircraft Industry (Group) Co., Ltd., Chengdu 610092, China; 2. Chengdu Textile College, Chengdu 611731, China)

Received date: 2022-02-23

Revised date: 2022-03-28

Accepted date: 2022-04-18

Online published: 2023-12-17

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摘要

为提高PH13 - 8Mo不锈钢的旋转弯曲疲劳寿命，针对H510、H540和H550 3种热处理状态，分别对未喷丸、一次喷丸及复合喷丸的试样表面形貌、表面粗糙度及疲劳寿命等进行测试。结果表明：与一次喷丸相比，H540和H550状态的复合喷丸的疲劳增益效果显著优于H510状态。在σmax=800 MPa，R=-1条件下，H510、H540和H550状态Kt=1旋转弯曲疲劳寿命分别提高0.3倍、1.4倍和1.4倍。与一次喷丸相比，Kt=2复合喷丸增益效果显著优于Kt=1。在σmax=550 MPa，R=-1条件下，Kt=2旋转弯曲疲劳寿命提高了5.5倍。对PH13 - 8Mo钢采用喷丸强化可延长其疲劳寿命。相对未喷丸的试样，喷丸强化的Kt=1旋转弯曲疲劳寿命至少延长1个数量级。复合喷丸强化试样的表面粗糙度、表面形貌、残余应力场以及旋转弯曲疲劳寿命均优于一次喷丸。

关键词： PH13 - 8Mo; 复合喷丸; 表面粗糙度; 表面形貌; 残余应力场; 疲劳寿命

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华程, 姚兰, 杨屹, 李维, 易吉豪 . 复合喷丸强化对PH13 - 8Mo钢旋转弯曲疲劳寿命的影响[J]. 材料保护, 2022 , 55(8) : 125 -129 . DOI: 10.16577/j.issn.1001-1560.2022.0225

Abstract

In order to improve the rotating bending fatigue life of PH13 - 8Mo stainless steel, the surface morphology, surface roughness and fatigue life of samples without shot peening, single shot peening and composite shot peening were tested respectively in the H510, H540 and H550 heat - treated states. Results showed that in the comparison with single shot peening, the fatigue enhancing effect of the specimens treated with composite shot peening in H540 and H550 states was significantly better than that of the specimens in H510 state. Under the condition that σmax=800 MPa and R=-1, the Kt=1 fatigue life of specimens in H510, H540 and H550 states was increased by 0.3, 1.4 and 1.4 times respectively. Compared with single shot peening, the enhancing effect of Kt=2 composite shot peening had better than that of Kt=1. Under the condition that σmax=550 MPa and R=-1, the Kt=2 rotating bending fatigue life was increased by 5.5 times. Shot peening could improve the fatigue life of PH13 - 8Mo steel. The Kt=1 rotating bending fatigue life of the specimens treated with shot peening was at least 1 order of magnitude higher than that of the non - shot peening specimens. Besides, the surface roughness, surface morphology, residual stress field and fatigue life of composite shot peening specimens were all better than that of the specimens treated with single shot peening.

Key words： PH13 - 8Mo; composite shot peening; surface roughness; surface morphology; residual stress field; fatigue life

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