316L不锈钢的低能量激光冲击强化工艺

doi:10.13251/j.issn.0254-6051.2022.09.016

摘要/Abstract

摘要： 以316L不锈钢作为模型材料,系统研究了低能量高重频激光冲击强化工艺。建立了激光光斑覆盖率概念,对于直径d为0.4~0.8 mm 间的光斑,其饱和覆盖率在6~7之间。在此饱和覆盖率条件下,机械手移动速率v与光斑直径d的匹配关系为v=70d。最大残余压应力随着光斑直径的减小而增大,当光斑直径d为0.4 mm时获得最大残余压应力为662 MPa,残余压应力影响层深度为565 μm。激光冲击强化区域表面粗糙度未明显增加,但与未冲击区域存在一定高度台阶。在1.59 GW/cm²激光功率密度下,该台阶高度为23 μm。

关键词: 激光冲击, 低能量, 残余应力, 覆盖率

Abstract: Using 316L stainless steel as the model material, the low-energy high-repetition rate laser shock peening process was systematically studied. A concept of laser spot coverage ratio was established. For the spot diameter d between 0.4-0.8 mm, the saturation coverage ratio is 6-7, under which the matching relationship between the manipulator movement rate v and the spot diameter d is v=70d. The maximum residual compressive stress increases with the decrease of the spot diameter. When the spot diameter d is 0.4 mm, the maximum residual compressive stress is 662 MPa, and the depth of the residual compressive stress affected layer is 565 μm. The surface roughness of the laser shock peened area does not increase significantly, but there is a step with certain height between the laser shocked and unshocked zones. At a laser power density of 1.59 GW/cm², the step height is 23 μm.

Key words: laser shock, low energy, residual stress, coverage ratio

中图分类号:

V261.8
TG178

覃恩伟, 刘丽霞, 刘成威, 陆海峰, 吴树辉. 316L不锈钢的低能量激光冲击强化工艺[J]. 金属热处理, 2022, 47(9): 92-97.

Qin Enwei, Liu Lixia, Liu Chengwei, Lu Haifeng, Wu Shuhui. Laser shock peening process with low pulse energy of 316L stainless steel[J]. Heat Treatment of Metals, 2022, 47(9): 92-97.

参考文献

[1]乔红超, 胡宪亮, 赵吉宾, 等. 激光冲击强化的影响参数与发展应用[J]. 表面技术, 2019, 48(12): 1-9, 53.
Qiao Hongchao, Hu Xianliang, Zhao Jibin, et al. Influence parameters and development application of laser shock processing[J]. Surface Technology, 2019, 48(12): 1-9, 53.
[2]朱然, 谢地辉, 朱帅光, 等. 高频率Nd∶YLF平顶激光冲击对TC6钛合金表面应力及微变形的影响[J]. 金属热处理, 2022, 47(3): 204-210.
Zhu Ran, Xie Dihui, Zhu Shuaiguang, et al. Effect of high frequency Nd: YLF flat-top laser shock on surface stress and micro-defromation of TC6 titanium alloy[J]. Heat Treatment of Metals, 2022, 47(3): 204-210.
[3]王帅, 杨阳, 花国然, 等. 激光冲击E690高强钢表面应变预测模型的建立[J]. 金属热处理, 2020, 45(10): 225-230.
Wang Shuai, Yang Yang, Hua Guoran, et al. Establishment of surface strain prediction model of E690 high strength steel by laser shock processing[J]. Heat Treatment of Metals, 2020, 45(10): 225-230.
[4]Wang C, Li K, Hu X, et al. Numerical study on laser shock peening of TC4 titanium alloy based on the plate and blade model[J]. Optics and Laser Technology, 2021, 142: 107163.
[5]Caralapatti V K, Narayanswamy S. Analyzing the effect of high repetition laser shock peening on dynamic corrosion rate of magnesium[J]. Optics and Laser Technology, 2017, 93: 165-174.
[6]曹宇鹏, 王帅, 施卫东, 等. 激光冲击对E690高强钢激光熔覆修复微观组织的影响[J]. 光子学报, 2021, 50(4): 91-101.
Cao Yupeng, Wang Shuai, Shi Weidong, et al. Effect of laser shock on microstructure of the repair layer of E690 high strength steel by laser cladding[J]. Acta Photonica Sinica, 2021, 50(4): 91-101.
[7]帅仕祥, 吴俊峰, 车志刚, 等. 激光冲击强化Al7050-T7451合金紧固孔的残余应力研究[J]. 航空制造技术, 2021, 65(9): 103-109.
Shuai Shixiang, Wu Junfeng, Che Zhigang, et al. Residual stresses of Al7050-T7451 alloy fastener holes with laser shock peening[J]. Aeronautical Manufacturing Technology, 2021, 65(9): 103-109.
[8]张浩, 孙志强, 曹子文, 等. 激光冲击强化对TB6钛合金微动磨损行为的影响[J]. 航空制造技术, 2021, 64(17): 78-84, 101.
Zhang Hao, Sun Zhiqiang, Cao Ziwen, et al. Effect of laser shock peening on fretting wear behavior of TB6 titanium alloy[J]. Aeronautical Manufacturing Technology, 2021, 64(17): 78-84, 101.
[9]李金坤, 王守仁, 王高琦, 等. 激光冲击强化对Ti6Al4V钛合金骨板表面改性与摩擦学性能的影响[J]. 中国激光, 2022, 49(2): 105-115.
Li Jinkun, Wang Souren, Wang Gaoqi, et al. Effect of laser shock peening on surface modification and tribological properties of Ti6Al4V titanium alloy bone plates[J]. Chinese Journal of Lasers, 2022, 49(2): 105-115.
[10]王强, 高国强, 罗学昆. 激光喷丸与机械喷丸复合强化对2124-T851铝合金疲劳寿命的影响[J]. 表面技术, 2021, 50(4): 96-102.
Wang Qiang, Gao Guoqiang, Luo Xuekun. Effect of laser shot peening and shot peening compound strengthening process on fatigue life of 2124-T851 aluminum alloy[J]. Surface Technology, 2021, 50(4): 96-102.
[11]葛良辰, 花国然, 曹宇鹏, 等. 激光冲击参数对7050铝合金残余应力场的影响[J]. 金属热处理, 2020, 45(9): 81-86.
Ge Liangchen, Hua Guoran, Cao Yupeng, et al. Effect of laser shocking parameters on residual stress field of 7050 aluminium alloy[J]. Heat Treatment of Metals, 2020, 45(9): 81-86.
[12]孟帅, 崔承云, 陈凯, 等. 激光冲击高锰钢的微观组织与力学性能[J]. 电镀与涂饰, 2020, 39(12): 760-765.
Meng Shuai, Cui Chengyun, Chen Kai, et al. Microstructure and mechanical properties of laser-shock-peened high-manganese steel[J]. Electropolishing and Finishing, 2020, 39(12): 760-765.
[13]金成嘉, 陈炳泉, 李纬, 等. 激光冲击对AISI430铁素体不锈钢抗蚀性影响[J]. 激光技术, 2020, 44(2): 212-216.
Jin Chengjia, Chen Bingquan, Li Wei, et al. Effect of laser shock peening on corrosion resistance of AISI430 ferritic stainless steel[J]. Laser Technology, 2020, 44(2): 212-216.
[14]张明扬, 朱颖, 郭伟, 等. 激光冲击强化对TC17钛合金高周疲劳性能的影响[J]. 激光技术, 2017, 41(2): 231-234.
Zhang Mingyang, Zhu Ying, Guo Wei, et al. Effects of laser shock processing on fatigue properties of TC17 titanium alloy[J]. Laser Technology, 2017, 41(2): 231-234.
[15]Lu J Z, Wu L J, Sun G F, et al. Microstructural response and grain refinement mechanism of commercially pure titanium subjected to multiplelaser shock peening impacts[J]. Acta Materialia, 2017, 127: 252-266.
[16]Wang Z D, Sun G F, Lu Y, et al. Microstructural characterization and mechanical behavior of ultrasonic impact peened and laser shock peened AISI 316L stainless steel[J]. Surface and Coatings Technology, 2020, 385: 125403.
[17]Bai Y, Wang H, Wang S, et al. Life cycle strengthening of high-strength steels by nanosecond laser shock[J]. Applied Surface Science, 2021, 569: 151118.
[18]Lavisse L, Kanjer A, Berger P, et al. High temperature oxidation resistance and microstructure of laser-shock peened Ti-Beta-21S[J]. Surface and Coatings Technology, 2020, 403: 126368.
[19]Yella P, Venkateswarlu P, Buddu R K, et al. Laser shock peening studies on SS316LN plate with various sacrificial layers[J]. Applied Surface Science, 2018, 435: 271-280.
[20]Sanchez A G, You C, Leering M, et al. Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651[J]. International Journal of Fatigue, 2021, 143: 106025.
[21]Sano Y, Obata M, Kubo T, et al. Retardation of crack initiation and growth in austenitic stainless steels by laser peening without protective coating[J]. Materials Science and Engineering A, 2006, 417 (1): 334-340.