Study on Thermal Stability of Hypereutectic Surfacing Alloy Fe2B Hard Phase

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Ma, Zhen^1 ; Mu, Liting^1 ; Wang, Jun^2 ; Zhuang, Minghui^1 ; Li, Muqin^1

School of Materials Science and Engineering, Jiamusi University, Jiamusi, Heilongjiang

154007, China^1

School of Aeronautics and Astronautics, Tianjin Sino-Germen University of Applied Sciences, Tianjin

300350, China^2

关键词: After-heat treatment;    Eutectic structures;    Metallographic technique;    Microstructure properties;    Surfacing alloys;    Weld microstructures;    Weld structure;    Weld-surfacing;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/5/052051/pdf
DOI  :  10.1088/1755-1315/199/5/052051

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The microstructure properties of high-boron surfacing and the thermal stability of Fe2B was investigated. Each of the specimens was characterized by metallographic techniques. Phase analysis of alloy was performed by X-ray diffraction. The results show that when the carbon content was 0.13 wt%, the weld surfacing structure was blocky and rod-shaped Fe2B + Fe. When the carbon content was 0.57 wt%, the weld structure was a bulk Fe2B and eutectic fishbone Fe2B, and a chrysanthemum-like Fe3(B,C). When the carbon content increased to 1.0 wt%, the fishbone tissue disappeared, and the eutectic structure consisted of chrysanthemum-like tissue. The structure was blocky Fe2B and eutectic structure chrysanthemum Fe3(B,C). After heat treatment, the microstructure of Fe2B hard phase in the weld microstructure did not change, and kept block and a strip shape. Due to the high temperature effect, the eutectic fish bone Fe2B + y-Fe and the eutectic chrysanthemum Fe3(B,C) + y-Fe between the Fe2B were converted into Fe2B. Fe2B hard phase has good thermal stability.