슈퍼 2상 스테인리스강의 미세조직 및 기계적 성질에 미치는 시효의 영향
Effect of Aging on the Microstructure and Mechanical Properties in Super Duplex Stainless Steel
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With the increase in the annealing temperature, the volume fraction of austenite phase increased and the volume fraction of ferrite phase decreased. In compliance with the addition of N, not only the volume fraction of austenite phase was increased but also the austenite structure was made larger. Volume fraction of s phase was increased by decreasing of the volume fraction of ferrite phase, with the increase in the aging time and in compliance with the addition of N. As increasing in volume fraction of s phase, tensile strength and hardness increased, while elongation and impact value decreased. Elongation slowly decreased and impact value rapidly decreased at the early stage of aging. By the added N, tensile strength, elongation, hardness and impact value was increased.
Abstract
With the increase in the annealing temperature, the volume fraction of austenite phase increased and the volume fraction of ferrite phase decreased. In compliance with the addition of N, not only the volume fraction of austenite phase was increased but also the austenite structure was made larger. Volume fraction of s phase was increased by decreasing of the volume fraction of ferrite phase, with the increase in the aging time and in compliance with the addition of N. As increasing in volume fraction of s phase, tensile strength and hardness increased, while elongation and impact value decreased. Elongation slowly decreased and impact value rapidly decreased at the early stage of aging. By the added N, tensile strength, elongation, hardness and impact value was increased.
참고문헌 (6)
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- 이상기, "슈퍼 2상 스텐인리스강의 피로균열진전 특성에 미치는 미세조직의 영향", 한국해양공학회지, 14(2), pp.65~ (2000)
- Cui, J., "Degradatiom of Impact Toughness due to Formation R Phase in High Nitrogen 25 mass%Cr-Ni-Mo Duplex Stainless Steel", ISIJ International, 41(2), pp.192~195 (2001)
- Chen, T.H., "Effect of Solution Treatment and Continuous Cooling on σ Phase {recipition in a 2205 Duplex Stainless Steel", Materials Science and Engineering, A 311, pp.28~41 (2001)
- Fujino, N., "The Effect of High-Temperature Exposure on the Microstructural Stability and Toughness Property in a 2205 Duplex Stainless Steel", Material Science and Engineering, A 388, pp.259~270 (2002)
- Hoffmeister, H., "Pro. Conf. Duplex Stainless Steel 94", pp.43~ (1994), Glasgow Scotland