导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (8): 427293-427293.doi: 10.7527/S1000-6893.2022.27293

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Thermal deformation behavior of S280 ultra-high strength stainless steel based on response surface methodology

Kaiming ZHANG1, Kelu WANG1(), Shiqiang LU1, Mutong LIU2, Ping ZHONG2, Ye TIAN2   

  1. 1.School of Aerospace Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China
    2.Institute of Steel and Rare Precious Metals,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China
  • Received:2022-04-19 Revised:2022-05-12 Accepted:2022-06-14 Online:2023-04-25 Published:2022-06-17
  • Contact: Kelu WANG E-mail:wangkelu@126.com

Abstract:

The thermal deformation behavior of S280 ultra-high strength stainless steel was studied at deformation temperatures of 850–1 150 ℃ and strain rates of 0.001–1 s-1. The isothermal constant strain rate compression experiments were carried out using the Thermecmaster-Z thermal simulation tester. The flow behavior characteristics of the stainless steel was analyzed. The thermal deformation activation energy parameter and the strain rate sensitivity exponent were calculated. A response surface model was established with deformation temperature, strain rate, and strain as the input variables and thermal deformation activation energy parameter and strain rate sensitivity exponent as the response targets. The thermal processing process parameters were optimized by multi-objective visualization. The results show that the S280 ultra-high strength stainless steel is a positive strain rate and negative temperature sensitive material, and its flow stress decreases with decreasing strain rate and increasing deformation temperature. The established response surface model has high accuracy and can intuitively reflect the relationship between material parameters and thermal deformation conditions, and can be used for prediction of material-related parameters. Through multi-objective visual optimization and microstructure verification, the optimal thermal processing process parameters for S280 ultra-high strength stainless steel were obtained to be in the range of deformation temperature of 1 085–1 150 ℃ and strain rate of 0.001–0.003 s-1.

Key words: S280 ultra-high strength stainless steel, response surface method, thermal deformation behavior, process parameter optimization, thermal deformation activation energy, strain rate sensitivity exponent

CLC Number: