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热喷涂技术:2020,12(4):64-68
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激光熔覆工艺对铁基合金熔覆层耐蚀性影响的研究
马尧1,2,3,4, 胡宇1,2,3,4, 杜开平1,2,3,4, 王立新1,2,3,4
(1.矿冶科技集团有限公司;2.北矿新材科技有限公司;3.北京市工业部件表面强化与修复工程技术研究中心;4.特种涂层材料与技术北京市重点实验室)
Corrosion Resistance of Iron-based Alloy Coating by Laser Cladding
Yao Ma1,2,3,4, Yu Hu1,2,3,4, Du Kaiping1,2,3,4, Lixin Wang1,2,3,4
(1.BGRIMM Technology Group;2.BGRIMM Advanced Materials Science and Technology Co., Ltd,;3.Beijing Engineering Research Center of Surface Strengthening and Repairing of Industry Parts;4.Beijing Key Laboratory of Special Coating Materials and Technology)
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中文摘要: 采用不同熔覆工艺进行了铁基粉末的熔覆试验, 结果表明, 随着熔覆功率的增大, 熔覆层组织逐渐变粗大, 耐蚀性下降。 通过腐蚀位置组织结构观察发现, 腐蚀沿晶界从熔覆层表面向内部发展, 并逐渐向晶粒内部发展。 枝晶间的硼化物成分组成改变及碳化物在冷却过程中析出造成基体进一步贫铬, 是熔覆层耐蚀性下降的主要原因。
中文关键词: 激光熔覆  耐蚀  凝固
Abstract:Cladding test of iron-based powder was carried out by different processes. The test result shows that the cladding structure gradually becomes coarser with the increasing of cladding power, and the corrosion resistance decreases. By observation of the structure of corrosion location, it is found that the corrosion develops from the cladding surface to the interior along the grain boundary, and then gradually into the grain interior. The change of boride composition between dendrites and the precipitation of carbides during cooling resulting in further chromium depletion in the matrix is the main reason for the deterioration of corrosion resistance of cladding
文章编号:     中图分类号:TG174.4    文献标志码:
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引用文本:
马尧,胡宇,杜开平,王立新.激光熔覆工艺对铁基合金熔覆层耐蚀性影响的研究[J].热喷涂技术,2020,12(4):64-68.
Yao Ma,Yu Hu,Du Kaiping,Lixin Wang.Corrosion Resistance of Iron-based Alloy Coating by Laser Cladding[J].Thermal Spray Technology,2020,12(4):64-68.

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