Study on Clad of Nickel Base Alloys Based on Rare Earth Added Clad Alloy
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摘要: 研究了镍基合金的组织、相组成,进行了镍基合金表面堆焊工艺试验,研究了堆焊层宏观组织及微观组织的分布,并进行了堆焊层及界面区域的显微硬度分布测试.结果表明:提出的镍基合金由γ-(Ni,Fe),FeNi3,Ni和少量的Fe2C组成,堆焊层组织分布均匀,无开裂、气孔等缺陷,显微硬度从174HV0.2提高到780HV0.2.Abstract: On the basis,overlaying welding experiment was carried out and the macrostructure and microstructure distribution were analyzed.Consequently,the micro hardness distribution was detected.The results show that the proposed nickel base alloy consists of γ-(Ni,Fe),FeNi3,Ni and little Fe2C.The microstructure of clad distributed homogeneously without gas porosity and cracking.The micro hardness is increased from 174HV0.2 to 780HV0.2.
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Key words:
- nickel base alloy /
- clad /
- linear expansion coefficient /
- microstructure
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