한국해양대학교

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PTA 공법에 의한 Nimonic 80A 초합금재 Overlay층의 마찰 마모 특성에 관한 연구

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dc.contributor.author 이광렬 -
dc.date.accessioned 2017-02-22T02:26:24Z -
dc.date.available 2017-02-22T02:26:24Z -
dc.date.issued 2004 -
dc.date.submitted 2006-05-29 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174393 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/8409 -
dc.description.abstract Wear and corrosion are regarded as both mechanical and chemical damage. Besides that point, these are fatal factor in the operational condition of products . With the proceeding of the wear and corrosion, the performance of parts is getting lower, and the possibility of the accident increases. Therefore, either repairing the parts or exchanging the damaged parts with the new ones is required. Regarding repair, surface modification methods as metal spray and overlay welding are generally used. Overlay welding is the way to coats the material on the surface for the purpose of anti-wear, anti-corrosion and heat resisting properties. The various coating way are used to repair the wear parts. MIG and TIG welding method are commonly used for the purpose of the overlay welding and PTA processing is adopted recently. The PTA processing has high performance compared with other welding ways and its usage is getting expanded due to the development of new machine and controlling technique. In this study, the MIG welding and PTA processing on Nimonic 80A superalloys are adopted. The purpose of this study is to clarify the microstructure, wear, and erosion properties of the each weld metal. Following results were obtained from this study : 1. In the MIG welding and PTA processing on Nimonic 80A superalloys, the quality of the overlay layer was different with the overlay coating methode. In case of MIG welding, liquation crack takes place in the base metal, whereas, the liquation crack does not takes place by PTA processing. 2. The wear properties of the Stellite 6 overlay materials show the best performance, whereas Inconel 718 material shows the worst wear properties. 3. In case of the cavitation erosion properties Inconel 625 overlay layers shows the best performance, whereas Stellite 6 are shows the worst erosion properties. -
dc.description.tableofcontents 1. 서 론 01 2. Nimonic 80A의 특성 04 2.1 Nimonic 80A의 금속학적 특성 04 2.2 Nimonic 80A의 기계적 성질 06 2.3 Nimonic 80A의 관련 상태도 08 2.3.1 Ni-Cr 상태도 08 2.3.2 Ni-Cr-Ti 상태도 09 2.3.3 Ni-Al 상태도 10 2.3.4 Ni-Cr-Al 상태도 11 2.3.5 Ni-Al-Ti-Cr 상태도 12 2.4 강화기구 13 2.4.1 고용강화 13 2.4.2 석출경화 15 2.4.3 입계강화 16 3. 실 험 방 법 3.1 MIG용접과 PTA공정의 오버레이층의 분석 17 3.2 PTA공정을 이용한 용가재별 오버레이층의 특성 19 3.2.1 PTA공정의 적용 19 3.2.2 오버레이층의 조직검사 24 3.2.3 경도측정 24 3.2.4 오버레이층의 내마모 시험 25 3.2.5 오버레이층의 내에로젼성 시험 29 4. 결과 및 고찰 32 4.1 MIG용접과 PTA공정을 적용한 각 오버레이층의 특성 32 4.2 PTA공정을 적용한 각 용가재별 오버레이층의 조직 및 경도 특성 37 4.3 PTA공정을 적용한 오버레이층의 마찰마모특성 42 4.4 PTA공정을 적용한 오버레이층의 내에로젼 특성 47 5. 결 론 49 참 고 문 헌 51 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title PTA 공법에 의한 Nimonic 80A 초합금재 Overlay층의 마찰 마모 특성에 관한 연구 -
dc.title.alternative A Study on the Friction and Wear Properties of the Nimonic 8A Superalloys Overlay layers by PTA Processing -
dc.type Thesis -
dc.date.awarded 2004-08 -
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