http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 주제어 : High velocity oxygen-fuel thermal spray coating(초고속 용사코팅) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
SM490B 용접부의 피로균열 성장 거동에 미치는 초고속 용사코팅 효과
윤명진(Myungjin Yoon),최성종(Sungjong Choi),조원익(Wonik Cho) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.4
High velocity oxygen-fuel thermal spray coating of the WC-Co cermet material is a well-established process for modifying the surface properties of the structural components exposed to the corrosive and wear attacks, and also these coating are well-known method to improve the fatigue strength of material. In this study, HVOF coated SM490B are prepared to evaluation of the effect of coating on tension and fatigue crack growth behavior. The pre-crack of the fatigue crack growth test specimens machined at deposited material area, heat affected zone and boundary, respectively. Through these test, the following results are obtained: 1) Tensile strength was about 498 MPa, and fracture occurred on base metal area. 2) The fatigue crack of coated specimens propagated more rapidly than non-coated specimen in all specimens. 3) In the same coating thickness specimens, the specimens with pre-crack at boundary more rapidly propagated than the specimens with pre-crack at HAZ and deposited material area. These results can be used as basic data in a structural integrity evaluation of rolled SM490B weldments considering HVOF coating.
-
HVOF용사 코팅한 SM490B용접재의 피로크랙성장에 미치는 후 열처리의 영향
윤명진(Myungjin Yoon),최성종(Sungjong Choi) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
High velocity oxygen-fuel thermal spray coating of the WC-Co cermet material is a well-established process for modifying the surface properties of the structural components exposed to the corrosive and wear attacks. In this study, HVOF coated SM490B are prepared to evaluation of the effect of coating and post-heat treatment on fatigue crack growth behavior. The pre-crack of the fatigue crack growth test specimens machined at deposited material area, heat affected zone and boundary, respectively. Through these test, the following results are obtained: 1) The fatigue crack of coated specimens propagated more rapidly than non-coated specimen in all specimens. 2) In the same coating thickness specimens, the specimens with pre-crack at boundary more rapidly propagated than the specimens with pre-crack at HAZ and deposited material area. This is probably because whereas the structure of the deposited material zone is very strong thanks to evenly distributed minute carbide or minute martensite, the structure of the edge is highly unstable and contains diverse defects. 3) In three type specimens, the fatigue crack growth rate of post-heat treatment specimen decrease in near-threshold value, while it was about the same in intermediated region and high growth rate region. These results can be used as basic data in a structural integrity evaluation of rolled SM490B weldments considering HVOF coating.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
