Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (7): 140-143.DOI: 10.13251/j.issn.0254-6051.2021.07.026

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of low-temperature stress relief annealing on corrosion resistance of 316L stainless steel cold stamping corrugated plate for plate heat exchanger

Shi Wei1,2,3, E Xin1,2,3, Wang Yanlong4 , Liu Limei1,2, Yong Hongtuanhua5, Zhang Ping1,2   

  1. 1. Lanzhou LS Test Technology Co., Ltd., Lanzhou Gansu 730314, China;
    2. Gansu Engineering Laboratory of Materials Characterization and Safety Evaluation for Machinery Equipment, Lanzhou Gansu 730314, China;
    3. Gansu Engineering Technology Research Center of High-end Castings and Forgings, Lanzhou Gansu 730314, China;
    4. Lanzhou Lanshi Heat Exchange Equipment Co., Ltd., Lanzhou Gansu 730314, China;
    5. Lanzhou Lanshi Zhongke Nanotechnology Co., Ltd., Lanzhou Gansu 730314, China
  • Received:2021-02-19 Online:2021-07-25 Published:2021-12-10

Abstract: Effect of stress relief annealing on corrosion resistance of the 316L stainless steel cold stamping corrugated plate for plate heat exchanger was studied by means of martensite content detection, XRD phase analysis and electrochemical test.The results show that with the increase of stress relief annealing temperature, the continuous transformation from residual austenite to martensite is caused by the cooperative deformation of austenite and strain induced martensite in the 316L stainless steel cold stamping corrugated plate, resulting that the content of martensite is increased and the martensite transforms to tempered martensite, the self-corrosion potential becomes more negative and the corrosion resistance becomes worse.

Key words: 316L stainless steel, plate heat exchanger, stress relief annealing, martensite content

CLC Number: