Effect of Heat Treatment Process on Hardness and Corrosion Resistance of GH4169

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Feng, Shengnan^1 ; Gong, J.H.^1 ; Li, Huixiang^1 ; Wang, Haoran^1

School of Mechanical and Electrical Engineering, Shandong University, Weihai, China^1

关键词: Double aging;    Effect of heat treatments;    Grain size;    Hardness and corrosion;    Hardness values;    Heat treatment process;    Nickel- based superalloys;    Simulated seawaters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022089/pdf
DOI  :  10.1088/1757-899X/452/2/022089

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to study the effect of the heat treatment process on the microstructure, properties, and especially the corrosion resistance of the nickel-based superalloy GH4169. The three groups of specimens were separately subjected to three types of heat treatment, and the specimens treated in different ways were placed in a simulated seawater solution (6% FeCl3 solution) for 3 days and tested for corrosion rate. It was found that the microstructure of the sample treated at 1050°C was finest and uniform, and the grain size was about 50 μm square. The difference between the hardness values of the samples treated with double aging and 950°C was about 40 HRC, which was higher than 1050°C. The hardness value of the finished sample is high, and the corrosion rate of the sample treated at 1050°C is the lowest.