|
|
Effect of cold rolling and annealing on microstructure and properties of a new resource-saving duplex stainless steel Fe–19Cr–0.6Al–12Mn |
Ming‑ming Pan 1, Xiao‑ming Zhang 1, Yong Chen 1, Xiang‑bin Su 1, Peng Chen 1 |
1 State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China |
|
|
Abstract An Fe–19Cr–0.6Al–12Mn duplex stainless steel with an optimized alloy composition of Ni replaced by Mn and Cr partially replaced by Al was developed to avoid the edge cracking, which is a common defect in the hot rolling of traditional two-phase stainless steels. The newly developed duplex stainless steel could be hot-rolled in the single-phase ferrite (α) region by controlling rolling temperature and the single-phase ferrite microstructure was retained on water cooling. To obtain the two-phase stainless steel product with ferrite and austenite (γ) microstructure, cold rolling and annealing were carried out, and appropriate cold rolling reduction and annealing process parameters were determined. The significant impact of annealing on microstructure, mechanical properties and pitting resistance of the experimental steel was studied. It was observed that with the increase in cold rolling reduction, the number of γ nucleation points was dramatically increased leading to the precipitation of more γ at α grain boundaries after annealing. During annealing at 800 °C and with the increase in annealing time, the austenite fraction was increased with a lower rate and remained almost constant when the annealing time was greater than 4 h. With the increase in annealing temperature, the austenite fraction decreased gradually in the temperature range of 750–860 °C. Good combination of strength, ductility and excellent pitting resistance was obtained by cold rolling to 80% reduction and annealing at 800 °C for 4 h. Grain refinement and the existence of Σ3 boundaries played a vital role in improving the pitting resistance of the experimental steel. With good combination of strength, ductility and corrosion resistance, the newly developed duplex stainless steel is expected to be a new resource-saving dual-phase stainless steel.
|
|
|
|
|
Cite this article: |
Ming‑ming Pan,Xiao‑ming Zhang,Yong Chen, et al. Effect of cold rolling and annealing on microstructure and properties of a new resource-saving duplex stainless steel Fe–19Cr–0.6Al–12Mn[J]. Journal of Iron and Steel Research International, 2020, 27(12): 1420-1432.
|
|
|
|
[1] |
Tao Wang, Mei Zhang, Ren‑dong Liu, Liang Zhang, Lin Lu, Wen‑heng Wu. Effect of welding speed on microstructure and mechanical properties of laser-welded transformation induced plasticity (TRIP) steels[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(9): 1087-1098. |
[2] |
Ying Zhi, Di-wen Ke, Xiang-hua Liu, Zhi-xin Feng. Effects of annealing temperature on microstructure and properties of tailor-rolled blank of medium-manganese steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(8): 933-939. |
[3] |
A. Triwiyono, A.L. Han, A. Aryanto, S. Tudjono, B.S. Gan. Effect of specimen gauge reduction on uniaxial tension properties of reinforcing steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(8): 964-971. |
[4] |
You-hui Jiang, Shun Yao, Wei Liu, Yun Han, Su-peng Liu, Geng Tian, Ai-min Zhao. Influence of annealing temperatures on microstructure evolution and mechanical properties in a low-carbon steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(8): 981-991. |
[5] |
Ming Lei, Wei‑jun Hui, Jiao‑jiao Wang, Yong‑jian Zhang, Xiao‑li Zhao. Microstructure and mechanical properties of hot-rolled V-microalloyed Al-containing medium-Mn steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(5): 537-548. |
[6] |
Zhi-ming Li, Xiang Li, Lei Yang, Zheng-yan Shen, Bi-lei Wang, Shun-li Zhao, Gao-fei Liang, Chang-jiang Song. Effect of coiling and annealing temperatures on yield point behavior of low?carbon steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(3): 325-333. |
|
|
|
|