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Development of High Strength and High Toughness Bainitic Steel for Automotive Lower Arm
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Abstract
A high strength and high toughness new bainitic steel has been developed which shows comparable mechanical properties, fatigue property, and machinability to those of quenched and tempered SAE 5140. The heat treatment of the bainitic steel is aging after hot forging in order to improve ratio of 0.2% proof stress and tensile strength (i.e. yield ratio) and to avoid warpage associated with quenching. The new bainitic steel has been applied to the slender and lightweight lower arms for automotive suspension. As a result, the total production costs in the lower arms have been reduced by nearly 15 percent.
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Citation
Iwama, N., Nomura, I., Hanai, Y., Mori, M. et al., "Development of High Strength and High Toughness Bainitic Steel for Automotive Lower Arm," SAE Technical Paper 950211, 1995, https://doi.org/10.4271/950211.Also In
References
- Nomura I. Kawase Y. Wakikado Y. Maeda C. Ishikawa H. “High Toughness Microalloyed Steels for Vital Automotive Parts” SAE Technical Paper Series, 890511
- Iwama N. Tsuzaki K. Maki T. Nomura I. Hanai Y. Yamamoto T. “Effects of Alloying Elements and Tempering on Microstructure and Mechanical Properties in Bainitic Steels” CAMP-ISIJ 5 1992 801
- Iwama N. Tsuzaki K. Maki T. “Effect of Alloying Elements on Microstructure and Mechanical Properties of Low-Carbon Bainitic Steels” ‘Heat & Surface '92’ The 8th International Congress on Heat Treatment of Materials Kyoto 1992 49
- Habraken L.J. Economopoulos M. “Bainitic Microstructures in Low-Carbon Alloy Steels and Their Mechanical Properties” ‘Transformation and Hardenability in Steels’ Climax Molybdenum Co. Symposium Michigan 1967 69
- Biss V. Cryderman R.L. “Martensite and Retained Austenite in Hot-Rolled, Low-Carbon Bainitic Steels” Met. Trans. 2 1971 2267
- Iwama N. Nomura I. Hanai Y. Mori M. Suzuki M. Mizuno K. “Effect of Microstructure on Toughness and Yield Ratio in High-Strength Microalloyed Steel (Development of High-Fatigue Strength Bainitic Steel -1)” CAMP-ISIJ 7 1994 772