Research on high-temperature oxidation resistance, hot forming ability, and microstructure of Al–Si–Cu coating for 22MnB5 steel
Author:
Xiong Ziliu1, Lin Zhangguo2, Qi Jianjun2, Sun Li1, Wu Guangxin3, Kuang Shuang4, Zhou Guoping5
Affiliation:
1. Automotive Material Research Institute, HBIS Group Technology Research Institute, HBIS Group , Shijiazhuang , 050023, Hebei Province , China 2. HBIS Group Technology Research Institute, HBIS Group , Shijiazhuang , 050023, Hebei Province , China 3. State Key Laboratory of Advanced Special Steel, Shanghai University , Shanghai , 200444 , China 4. Technology Research Center, HBIS Tang Steel , Tang Shan , 063016, Hebei Province , China 5. High Strength Automotive Steel Co., Ltd, HBIS Tang Steel , Tang Shan , 063016, Hebei Province , China
Abstract
Abstract
High-temperature oxidation resistance, hot formability, element distribution, and microstructure of Al-10% Si-(0.5–3.0%)Cu coating were investigated by means of glow discharge spectroscopy, optical microscope, scanning electron microscope, and energy-dispersive spectroscopy. Results show that the addition of Cu can increase high-temperature oxidation resistance above 950°C and improve hot formability so that no crack spreads into substrate steel as hot forming at 33.3% strain. Oxidation film structure is continual and compacting, and Si highly concentrates in the surface layer. The distribution of Cu has skin effect with peaking content 8.2% in the surface layer. After hot stamping, Al and Si diffuse into substrate steel, and Cu diffuses from inner to outer coating. Al–Si–Cu coating has smoother surface, straighter diffusion layer, and finer metal compound than Al–Si coating. Surface and diffusion layers are identified as aluminum oxide, Si-rich, and Cu phase and Al7SiFe2, Al3Fe, and CuAl3, respectively. Al-rich phase and the metal compound are composed of α-Al dissolving Fe, Si, and Cu and Al–Si matrix, Cu3Al, respectively.
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference16 articles.
1. Berglund, G. The history of hardening of boron Steel in northern Sweden. 1st International Conference on Hot Sheet Metal Forming of High-Performance Steel, Kassel, Germany, 2008, pp. 176–177. 2. Tsuru, T. Hot-dipped Al-Mg-Si coating steel – its structure, electrochemical and mechanical properties. Corrosion Science and Technology, Vol. 9, 2010, pp. 233–238. 3. Kruehong, C., G. A. EL-Mahdy, A. Nishikata, and T. Tsuru. Influence of second phases on the electrochemical behavior of hot dipped Al–Mg–Si coated steel. Corrosion Science, Vol. 52, 2010, pp. 2379–2386. 4. Takata, N., M. Nishimoto, S. Kobayashi, and M. Takeyama. Morphology and formation of Fe–Al intermetallic layers on iron hot-dipped in Al–Mg–Si alloy melt. Intermetallics, Vol. 54, 2014, pp. 136–142. 5. Zhang, J., S. M. Jiang, and Q. F. Zhang. Current status of coatings for hot formed steel. Heat Treatment of Metals, Vol. 40, No. 3, 2015, pp. 169–172.
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