Effects of parameters on microstructure of bonding interface formed by overlapping laser cladding

HUANG Feng-xiao; JIANG Zhong-hao; LIU Xi-ming

doi:10.3788/OPE.20111902.0316

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Effects of parameters on microstructure of bonding interface formed by overlapping laser cladding

Article | 更新时间：2020-08-12

- Effects of parameters on microstructure of bonding interface formed by overlapping laser cladding
- Optics and Precision Engineering Vol. 19, Issue 2, Pages: 316-322(2011)
- 作者机构：
  
  1. 吉林大学材料科学与工程学院汽车材料教育部重点实验室,吉林长春,130025
  2. 空军航空大学力学教研室,吉林长春,130022
  3. 长春工业大学材料学院,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111902.0316
  CLC： TG156.99
- Received：08 October 2010，
  
  Revised：30 October 2010，
  
  Published Online：22 February 2011，
  
  Published：22 February 2011
- 稿件说明：
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黄凤晓, 江中浩, 刘喜明. 激光熔覆工艺参数对横向搭接熔覆层结合界面组织的影响[J]. 光学精密工程, 2011,19(2): 316-322

HUANG Feng-xiao, JIANG Zhong-hao, LIU Xi-ming. Effects of parameters on microstructure of bonding interface formed by overlapping laser cladding[J]. Editorial Office of Optics and Precision Engineering, 2011,19(2): 316-322
黄凤晓, 江中浩, 刘喜明. 激光熔覆工艺参数对横向搭接熔覆层结合界面组织的影响[J]. 光学精密工程, 2011,19(2): 316-322 DOI： 10.3788/OPE.20111902.0316.

HUANG Feng-xiao, JIANG Zhong-hao, LIU Xi-ming. Effects of parameters on microstructure of bonding interface formed by overlapping laser cladding[J]. Editorial Office of Optics and Precision Engineering, 2011,19(2): 316-322 DOI： 10.3788/OPE.20111902.0316.

摘要

为了提高搭接熔覆层的质量并控制搭接结合界面

研究了工艺参数对横向搭接结合区域组织形态的影响。结果显示

当扫描速度、送粉速率、激光功率分别在100~250 mm/min

6~7.5 g/min

1 500~2 500 W区间变化时

搭接结合区域呈现出不同的界面组织形态

没有出现白亮层。这些界面组织一类表现为具有组织与方向"遗传性"的连续外延式生长

另一类表现为非连续外延生长。工艺参数对结合界面组织的影响与其对前一道熔覆层表面转向枝晶区域的重熔深度以及前一道表面晶粒取向、各晶粒的熔化程度和激光熔池内存在的对流作用有关。

Abstract

In order to improve the cladding quality and to control the bonding interface of the layer formed by overlapping laser cladding

the effects of parameters on the microstructure of bonding interface were studied. The results show that when scanning speed

powder feeding rate and laser power change in the range of 100-250 mm/min

6-7.5 g/min and 1 500-2 500 W

respectively

the bonding region does not appear a white layer and presents different morphologies. One of morphologies is the continuous epitaxial growth with inherited microstructures and directions

and the other is discontinuous epitaxial growth. This is related to the effects of parameters on the depth of remelting region of a shifted dendrite

the orientation and molten degree of grain of a prior layer surface

and the con- vection in the molten pool.

关键词

Keywords

references

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