풍력발전시스템의 주 베어링용 0.18C-3.5Ni-1.5Cr-0.2Mo강의 침탄 표면특성

다국어 초록 (Multilingual Abstract)

Characteristics of carburized surface layers in 0.18C-3.5Ni-1.5Cr-0.2Mo steels for main shaft bearings of wind turbines have been analyzed and evaluated before and after rolling contact fatigue tests. Mixed microstructure consisting of retained austenite and tempered martensite has been formed with compressive residual stresses in the surface hardened layers of the specimens showing uniform hardness distribution with value about Hv700 after vacuum carburizing and tempering. It has been found on the raceway of the layers of the specimens after rolling contact fatigue tests that the amount of retained austenite decreased and compressive residual stresses increased, resulting from cyclic contact stresses applied during the tests. It has been also revealed that higher durability of the bearings can be obtained through controlling the amount of the retained austenite in the surface of the bearing steels to be lower in this study.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 방법
• 3. 실험결과 및 고찰
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 B.-Y. Choi, 39 : 1016-, 2001

2 W. Gräfen, 62 (62): 97-, 2007

3 K. Hokkirigawa, 21 : 151-, 1988

4 N. P. Suh, 25 : 111-, 1973

5 B. Y. Yoon, 28 : 634-, 1990

6 M. N. Kotzlas, 368 : 4829-, 2010

7 J. M. Hampshire, 22-, 1987

8 최병영, "열간단조 후 고주파 유도경화에 의해 제조된 휠 베어링 유니트용 0.52%C강의 특성과 변태거동" 대한금속·재료학회 48 (48): 1103-1108, 2010

9 "Worldwide Guide to Equivalent Iron and Steels, 4th Ed."

10 R. W. K. Honeycombe, "Steels, Microstructure and Properties" Edward Arnold 211-, 1981

11 B. Um, "Special Steels"

12 R. L. Norton, "Machine Design, an Integrated Approach, Third Ed., Chapter 6" Prentice Hall 1996

13 H. Schlicht, "Ball and Roller Bearing Engineering, 1"