Response of laser shock on high speed steel W9Cr3Mo4V

FAN Yu-jie; GUO Er-bin; DAI Yi-bin; CUI Peng-fei; TANG De-ye

doi:10.3788/OPE.20162413.0094

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Response of laser shock on high speed steel W9Cr3Mo4V

更新时间：2020-08-13

- Response of laser shock on high speed steel W9Cr3Mo4V
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 94-102(2016)
- 作者机构：
  
  1. 江苏大学机械工程学院,江苏镇江,212013
  2. 江苏科技大学机械工程学院,江苏镇江,212000
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0094
  CLC： TN249;TG156.99
- Received：29 May 2016，
  
  Revised：15 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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樊玉杰, 郭二彬, 戴毅斌等. 激光冲击强化高速钢W9Cr3Mo4V响应[J]. 光学精密工程, 2016,24(10s): 94-102

FAN Yu-jie, GUO Er-bin, DAI Yi-bin etc. Response of laser shock on high speed steel W9Cr3Mo4V[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 94-102
樊玉杰, 郭二彬, 戴毅斌等. 激光冲击强化高速钢W9Cr3Mo4V响应[J]. 光学精密工程, 2016,24(10s): 94-102 DOI： 10.3788/OPE.20162413.0094.

FAN Yu-jie, GUO Er-bin, DAI Yi-bin etc. Response of laser shock on high speed steel W9Cr3Mo4V[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 94-102 DOI： 10.3788/OPE.20162413.0094.

摘要

为了研究激光冲击强化高速钢W9Cr3Mo4V材料的响应性能，采用不同的激光能量、冲击次数对高速刚表面进行激光冲击强化处理。实验结果表明，激光冲击区域产生圆形凹坑变形，凹坑深度变形量随激光能量和冲击次数的增加而增大。激光冲击影响区域表面残余压应力，并随着激光能量和冲击次数的增加而增加，但冲击次数超过3次后，最大残余压应力趋于饱和状态，应力增幅并不明显。凹坑中心纳米硬度和弹性模量，随着激光能量和冲击次数的增加而增大，与基体相比，最大分别增加了15.04%和14.35%。受冲击波的力效应沿深度方向的影响，冲击区域表层晶粒尺寸最小约10

m，随着距离的增加，晶粒尺寸逐渐增大。根据晶粒尺寸的变化情况，将冲击影响区域分为5层：严重塑性变形层、塑性变形层、轻微塑性变形层、过渡层和基体。激光冲击能有效细化高速钢W9Cr3Mo4V表层晶粒，提高冲击区域表层的力学性能，为激光冲击强化高速钢刀具提供指导。

Abstract

The response properties of laser shock on high-speed steel W9Mo3Cr4V were studied experimentally by adopting different laser energies and shock frequencies. The experiment result indicates that the area under laser shock produces round pits

depth of which will increase as the laser energy and shock frequency increase. The surface residual stress exists in the surface of the impacted area under laser shock

and such residual stress increases as the laser energy and shock frequency increase; but the maximum residual stress will approach saturation after three times of shock

without obvious stress amplification. The nano-hardness and elasticity modulus in the pimple center increase as the laser energy and shock frequency increase

and compared with the matrix

the maximum increases for the nano-hardness and elasticity modulus are respectively 15.04% and 14.35%. Impacted by the force effect of shock wave along the depth direction

the grain size in laser shock impacted area is approximately 10

m as a minimum

which increases with the increase of distance. According to the variation of grain sizes

the impacted area can be divided into 5 layers:severe plastic deformation layer

plastic deformation layer

slight plastic deformation layer

transition layer and the matrix. Laser chock can effectively refine surface layer grain of the high-speed steel W9Cr3Mo4V and improve the mechanical property in surface layer of the impacted area

thus providing guidance for the fabrication of laser shock strengthening high-speed steel tools.

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Keywords

references

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