Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (4): 79-84.DOI: 10.13251/j.issn.0254-6051.2023.04.013

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of heat treatment on microstructure and properties of 3J53 alloy

Li Xiaotao1, Huang Haitang2, Yang Jingyuan3, He Qubo2, Li Weimin4, Zheng Yawen2   

  1. 1. China Nuclear Power Engineering Co., Ltd., Shenzhen Guangdong 518124, China;
    2. Chongqing Material Research Institute Co., Ltd., Chongqing 400707, China;
    3. Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 100082, China;
    4. Shanghai Rocksensor Automation Co., Ltd., Shanghai 210018, China
  • Received:2022-12-16 Revised:2023-01-17 Published:2023-05-27

Abstract: Effect of heat treatment process on the microstructure and properties of the diaphragm material 3J53 alloy was studied. The results show that after solution at 920-1010 ℃ for 10 min, the 3J53 alloy can obtain uniform and fine grain structure but lower hardness. The grain size did not change obviously after solution at 980 ℃ for different time. After solution at 920-1010 ℃ for 10 min and aging at 670 ℃ for 5 h, the hardness is 302-346 HV0.2, which can not meet the requirements of pressure transmitter. After solution at 920 ℃ and cold rolling and then aging at 650-700 ℃ for 5 h, the hardness increases significantly, which reaches a peak value of 483 HV0.2 when aging at 670 ℃, that can meet the requirements of nuclear grade pressure transmitter. Compared with the imported products, it is found that there is no significant difference in the hardness, return difference performance and original range temperature influence performance of the domestic 3J53 alloy diaphragm specimen, which meet the requirements of domestic application.

Key words: nuclear grade pressure transmitter, constant elastic alloy, microstructure, measuring diaphragm, performance verification

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