AC8A 알루미늄합금 주조재의 열처리에 의한 특성 평가

이성열; 정재현; 박동현; 원종필; 김윤해; 이명훈; 문경만

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자료유형: 학술저널

저자정보: 이성열 정재현 박동현 원종필 김윤해 이명훈 문경만

저널정보: 한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제11권 제6호

발행연도: 2012.1

수록면: 280 - 285 (6page)

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연구주제

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연구배경

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연구방법

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연구결과

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Aluminum is on active metal, but it is well known that its oxide film plays a role as protective barrier which is comparatively stable in air and neutral aqueous solution. Thus, aluminum alloys have been widely applied in architectural trim, cold & hot-water storage vessels and piping etc., furthermore, the aluminum alloy of AC8A have been widely used in mold casting material of engine piston because of its properties of temperature and wear resistance. In recent years, the oil price is getting higher and higher, thus the using of low quality oil has been significantly increased in engines of ship and vehicle. Therefore it is considered that evaluation of corrosion resistance as well as wear resistance of AC8A material is also important to improve its property and prolong its lifetime. In this study, the effect of solution and tempering heat treatment to corrosion and wear resistance is investigated with electrochemical method and measurement of hardness. The hardness decreased with solution heat treatment compared to mold casting condition, but its value increased with tempering heat treatment and exhibited the highest value of hardness with tempering heat treatment temperature at 190 ℃ for 24hrs. Furthermore, corrosion resistance increased with decreasing of the hardness, and decreased with increasing of the hardness reversely. As a result, it is suggested that the optimum heat treatment to improve both corrosion and wear resistance is tempering heat treatment temperature at 190 ℃ for 16hrs.

#aluminum alloy #mold casting #corrosion resistance #wear resistance #solution heat treatment #tempering heat treatment

참고문헌 (12)

참고문헌 신청

A. Muhlend bruch / 1989 / / Z. Metallkde 31 : 239 ~

Deny A. Jones / 1996 / Principles and Prevention of CORROSION / Prentice Hall International, Jnc : 262 ~ 522

H. Borchers / 1967 / / Metall 21 : 1215 ~

H. Y. Lee / 1991 / Metal Corrosion Engineering / Yeon Kyung Culture Co. Ltd : 262 ~

M. Y. Doshi / 1975 / Nonferrous Metal Matewrial Engineering / KoRoNa Co. Ltd : 144 ~