SCM440H 금형강의 표면 처리에 따른 피로 특성 연구

• 영문명: Effect of Surface Treatment on Fatigue Strength of SCM440H
• 발행기관: 개인저작물
• 저자명: 염현호(Hyunho Yeom) 이문구(Moon Gu Lee) 이춘만(Choon Man Lee) 전용호(Yongho Jeon)
• 간행물 정보: 『개인저작물 - 공학』제30권 제8호, 779~784쪽, 전체 6쪽
• 주제분류: 공학 > 개인저작물
• 파일형태: PDF
• 발행일자: 2013.08.null

영문 초록

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.

목차

1. Introduction

2. Experiments

3. Results

4. Conclusion

REFERENCES

키워드

레이저 열처리 주파수 변조 진동 피닝 피로수명 초음파 피로 시험 Laser Heat Treatment Regulable Vibration Peening Fatigue Life Ultrasonic Fatigue Test