DOI QR코드

DOI QR Code

Effect of Surface Treatment on Fatigue Strength of SCM440H

SCM440H 금형강의 표면 처리에 따른 피로 특성 연구

  • Yeom, Hyunho (Department of Mechanical Engineering, Ajou Univ.) ;
  • Lee, Moon Gu (Department of Mechanical Engineering, Ajou Univ.) ;
  • Lee, Choon Man (Department of Mechanical Design & Manufacturing, Changwon National Univ.) ;
  • Jeon, Yongho (Department of Mechanical Engineering, Ajou Univ.)
  • Received : 2013.06.02
  • Accepted : 2013.06.27
  • Published : 2013.08.01

Abstract

Increased efficiency and improved performance associated with light-weight materials were investigated in this study. Numerous studies have investigated surface treatments to improve the fatigue strength of metals. Laser heat treatment is a promising method because the power and spot size can be easily controlled, allowing a small heat affected zone (HAZ). However, changes in the material properties can result; in particular, the material can become more brittle. In this study, a combination of laser heat treatment and vibration peening was proposed to increase fatigue strength without changing the material characteristics. SCM440H was investigated experimentally, and specimens were tested using a giga-cycle ultrasonic fatigue tester. The results show that the combination of these two processes significantly increased the fatigue strength and, furthermore, different fracture types were observed after a small and large number of cycles.

Keywords

References

  1. Kennedy, E., Byrne, G., and Collins, D. N., "A review of the Use of High Power Diode Lasers in Surface Hardening," Journal of Materials Processing Technology, Vol. 155-156, pp. 1855-1860, 2004. https://doi.org/10.1016/j.jmatprotec.2004.04.276
  2. Yasuoka, M., Wang, P., Zhang, K., Qiu, Z., Kusaka, K., Pyoun, Y. S., and Murakami, R., "Improvement of the Fatigue Strength of SUS304 Austenite Stainless Steel Using Ultrasonic Nanocrystal Surface Modification," Surface & Coatings Technology, Vol. 218, pp. 93-98, 2013. https://doi.org/10.1016/j.surfcoat.2012.12.033
  3. Suh, C. M., Pyoun, Y. S., Cho, I. H., and Baek, E. B., "UNSM Surface Technology for Manufacturing and Remanufacturing Torsion Bars for Crawler Vehicles," Journal of Ocean Engineering and Technology, Vol. 25, No. 6, pp. 80-85, 2011.
  4. Cho, I. S., Shin, C. S., Kim, J. Y., and Jeon, Y. H., "Accelerated Ultrasonic Fatigue Testing Applications and Research Trends," Trans. Korean Soc. Mech. Eng. A., Vol. 36, No. 6, pp. 707-712, 2012. https://doi.org/10.3795/KSME-A.2012.36.6.707
  5. Na, G. D., Yoo, Y. T., Shin, H. J., and Shin, B. H., "Characteristics Induction and Laser Surface hardening of SM45C Steel," J. Korean Soc. Precis. Eng., Vol. 23, No. 7, pp. 39-50, 2006.

Cited by

  1. Experimental Investigation on Torsional Analysis and Fracture of Tripod Shaft for High-speed Train vol.40, pp.11, 2016, https://doi.org/10.3795/KSME-A.2016.40.11.979