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Characteristic of quenching refrigerant for heat treatment deformation control of SM45C steel

  • Materials & Fracture · Solids & Structures · Dynamics & Control · Production & Design
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Abstract

This study deals with the characteristic of quenching refrigerant for heat treatment deformation control of SM45C steel. Heat-treatment deformation must be controlled for the progress of production parts for landing gear. Most of deformation is occurred on inconsistent cooling. The inconsistent cooling is caused by a property of quenching refrigerant. When a heated metal is deposited in the quenching refrigerant, the cooling speed is so slow in early period of cooling because of a steam-curtain. After additional cooling, the steam-curtain is destroyed. In this progress, the cooling speed is very fast. The object of this study is to control the deformation of heat-treatment for landing gear by improving the conditions of quenching. The cooling curves and cooling rates of water, oil and polymer solution are obtained and illustrated. From the characteristics of the quenching refrigerant, the effects of heat-treatments on thermal deformation and fatigue strength are also investigated.

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Authors and Affiliations

  1. School of Mechanical and Aerospace Engineering, ReCAPT, Gyeongsang National University, 900 Gazwa-dong, 660-701, Jinju-city Gyeongnam, Korea

    Sung-Ki Lyu

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  1. Sung-Ki Lyu
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Correspondence to Sung-Ki Lyu.

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Lyu, SK. Characteristic of quenching refrigerant for heat treatment deformation control of SM45C steel. KSME International Journal 16, 647–654 (2002). https://doi.org/10.1007/BF03184814

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  • DOI: https://doi.org/10.1007/BF03184814

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