Mechanical properties enhancement of laser remelting for jet electro-deposited coating

FAN Hui; ZHAO Yang-pei; WANG Shan-kui

doi:10.3788/OPE.20162413.0117

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Mechanical properties enhancement of laser remelting for jet electro-deposited coating

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- Mechanical properties enhancement of laser remelting for jet electro-deposited coating
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 117-122(2016)
- 作者机构：
  
  1. 江苏师范大学机电工程学院,江苏徐州,221116
  2. 江苏建筑职业技术学院机电学院,江苏徐州,221116
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0117
  CLC： TQ153.4
- Received：31 May 2016，
  
  Revised：12 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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范晖, 赵阳培, 王善奎. 射流电沉积涂层激光重熔的力学性能强化[J]. 光学精密工程, 2016,24(10s): 117-122

FAN Hui, ZHAO Yang-pei, WANG Shan-kui. Mechanical properties enhancement of laser remelting for jet electro-deposited coating[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 117-122
范晖, 赵阳培, 王善奎. 射流电沉积涂层激光重熔的力学性能强化[J]. 光学精密工程, 2016,24(10s): 117-122 DOI： 10.3788/OPE.20162413.0117.

FAN Hui, ZHAO Yang-pei, WANG Shan-kui. Mechanical properties enhancement of laser remelting for jet electro-deposited coating[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 117-122 DOI： 10.3788/OPE.20162413.0117.

摘要

为了提高射流电沉积层的力学性能，研究了激光重熔对射流电沉积沉积层性能的影响，优化了相关工艺参数。采用射流电沉积方法在304不锈钢表面制备纳米结构铜沉积层后开展激光重熔工艺。采用扫描电镜和X射线衍射仪观察涂层表面形貌和晶粒尺寸，并对涂层进行了力学性能测试。测试结果表明：在优化的工艺参数下（电流密度为200 A/dm

，扫描速度为10 mm/s），射流电沉积制备铜沉积层表面较平整，微观结构较致密，由尺寸为60 nm的纳米晶颗粒组成。激光重熔后显微硬度、抗拉强度等力学性能都得到明显提高。显微硬度可以达到816 HV，抗拉强度可以达到590 MPa。通过拉伸断口形貌观察表明激光重熔后材料塑性会降低，因此激光重熔相关参数有将进一步的优化。

Abstract

In order to improve mechanical properties of the jet flow electro-deposition coating

the impact of laser remelting on performance of the jet flow electro-deposition coating was studied for process parameter optimization. The laser remelting process were realized after preparing the nano-structure copper deposition layer in the 304 stainless steel surface by the jet flow electro-deposition method. Thereafter the coating surface morphology and grain size were observed with Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD)

and the mechanical properties of the coating was tested. The results show that under the optimized process parameters where the operating current density is 200 A/dm

and the scanning speed is 10 mm/s

the surface of the copper deposition layer prepared by the jet flow electro-deposition method is relatively smooth and composed of 60 nm grains

with relatively compact microstructure. The mechanical properties including the micro-hardness and tensile strength are obviously improved after laser remelting

where the micro-hardness can reach 816 HV and the tensile strength can reach 590 MPa. Otherwise the plasticity decreases according to the tensile fracture morphology

which means the process parameters should be further optimized.

关键词

Keywords

references

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