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Novel water-air circulation quenching process for AISI 4140 steel

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Abstract

AISI 4140 steel is usually used after quenching and tempering. During the heat treatment process in industry production, there are some problems, such as quenching cracks, related to water-cooling and low hardness due to oil quenching. A water-air circulation quenching process can solve the problems of quenching cracks with water and the high cost quenching with oil, which is flammable, unsafe and not enough to obtain the required hardness. The control of the water-cooling and air-cooling time is a key factor in the process. This paper focuses on the quenching temperature, water-air cycle time and cycle index to prevent cracking for AISI 4140 steel. The optimum heat treatment parameters to achieve a good match of the strength and toughness of AISI 4140 steel were obtained by repeated adjustment of the water-air circulation quenching process parameters. The tensile strength, Charpy impact energy at −10 °C and hardness of the heat treated AISI 4140 steel after quenching and tempering were approximately 1098 MPa, 67.5 J and 316 HB, respectively.

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Authors and Affiliations

  1. College of Equipment Manufacture, Hebei University of Engineering, Handan, Hebei, 056038, China

    Liyun Zheng, Dawei Zheng & Lixin Zhao

  2. Xinxing Ductile Iron Pipes Co., Ltd, Wuan, Hebei, 056300, China

    Liyun Zheng, Lihui Wang & Kai Zhang

Authors
  1. Liyun Zheng
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  2. Dawei Zheng
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  3. Lixin Zhao
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  4. Lihui Wang
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  5. Kai Zhang
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Corresponding authors

Correspondence to Liyun Zheng or Lixin Zhao.

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Zheng, L., Zheng, D., Zhao, L. et al. Novel water-air circulation quenching process for AISI 4140 steel. Met. Mater. Int. 19, 1373–1376 (2013). https://doi.org/10.1007/s12540-013-6034-7

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  • DOI: https://doi.org/10.1007/s12540-013-6034-7

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