HTM ›› 2020, Vol. 45 ›› Issue (3): 20-24.DOI: 10.13251/j.issn.0254-6051.2020.03.005

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Effect of annealing temperature on precipitate and mechanical properties of V-Ti-Mo steel

Yu Wenchao, Xue Yanjun, Sun Ting, Wang Maoqiu, Shi Jie   

  1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China
  • Received:2019-11-14 Online:2020-03-25 Published:2020-04-03

Abstract:

Microstructure and mechanical properties of V-Ti-Mo steel were characterized after annealing at different temperatures. The results show that pearlite structure begins to decompose, and the amount of MC type precipitate in the experimental steels increases as the annealing temperature increasing. The MC type carbide in the hot rolled steel is mainly Ti(C, N), while (V, Mo)C gradually precipitates by increasing annealing temperature. The yield strength of the tested steel is calculated according to steel strengthening theory, the results show good agreement with the experimental data, which indicates that precipitation strengthening is the main reason for the strength increase after annealing.

Key words: V-Ti-Mo steel, annealing temperature, yield strength, precipitation strengthening

CLC Number: