한국해양대학교

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마찰압접을 이용한 선박디젤엔진용

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dc.contributor.author 오중석 -
dc.date.accessioned 2017-02-22T06:02:56Z -
dc.date.available 2017-02-22T06:02:56Z -
dc.date.issued 2011 -
dc.date.submitted 56959-08-17 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174887 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/9008 -
dc.description.abstract Inertia welding is a solid-state welding process in which butt welds in materials are made in bar or cylinder form at the joint face, and energy required for welding is obtained from a rotating flywheel. The stored energy is converted to frictional heat at the interface under axial load. The quality of the welded joint depends on many parameters, including axial force, initial revolution speed and energy, amount of upset, working time, and residual stresses in the joint. Inertia welding was conducted to make the large piston rod. Due to material characteristics, such as, thermal conductivity and flow stress, on the two sides of the weld interface, modeling is crucial in determining the optimal weld geometry and parameters. FE simulation was performed by the commercial code DEFORM-2D. A good agreement between the predicted and actual welded shape is observed. It is expected that modeling will significantly reduce the number of experimental trials needed to determine the weld parameters, especially for welds for which are very expensive materials or large rod. Many kinds of tests, including macro and microstructure observation, tensile, hardness and fatigue test, are conducted to evaluate the quality of welded joints. Based on the results of the tests, it can be concluded that the inertia welding joints of the large piston rod are better properties than the base material. -
dc.description.tableofcontents 1. 서론 1 1.1 연구 배경 1 1.2 연구 동향 2 1.3 연구 목적 4 2. 이론적 배경 5 2.1 피스톤 로드의 구성 및 기능 5 2.2 피스톤 로드 사용환경 8 2.3 기존의 피스톤 로드 제작 방법 9 2.4 마찰용접을 이용한 새로운 제작 방법 11 2.5 마찰용접 13 2.6 유한요소 기본 방정식 18 3. 마찰용접 유한요소 공정해석 22 3.1 마찰용접 공정해석 22 3.2 마찰용접 공정해석 결과 및 고찰 26 4. 마찰용접 실험 34 4.1 피스톤 로드 제작 34 4.2 마찰용접부 특성 평가 38 4.2.1 금속학적 평가 39 4.2.2 인장특성 평가 43 4.2.3 경도 특성 평가 44 4.2.4 피로 특성 평가 45 5. 결론 48 참고문헌 50 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 마찰압접을 이용한 선박디젤엔진용 -
dc.title.alternative 피스톤 로드 제작 공정 개발 -
dc.type Thesis -
dc.date.awarded 2011-02 -
dc.contributor.alternativeName Jung-Seok Oh -
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기계공학과 > Thesis
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