논문 상세보기
pp.528-534
The aim of this paper is to consider the effect of the manufacturing processes on corrosion and centerline cracking of ancient bronze spoons. The ancient bronze spoons in question were made by several steps of forging, in reheated condition with cast ingots. The manufacturing method is similar to that of the modern spoons. The investigations include observations from light and scanning electron microscopes of the microstructure in terms of the crack propagation. Cracks in the centerline are caused by solute segregation in the center-line region; this solute is solidified in the final stage of bronze spoon manufacture. Centerline cracking is also caused by α phase segregation, accompanied by forged overlapping along the longitudinal direction of the spoons. A vertical stripe with cracks along the centerline of the spoon’s width is formed by folding in the wrought process. The overlapping area causes crack propagation with severe corrosion on the spoon surfaces over a period of a thousand years. The failure mechanisms of ancient bronze spoons may be similar to that of modern spoons, and the estimation of the failure mechanisms of ancient spoons can be appropriate to determine failure causes for such modern spoons.
2. 실험 방법
2.1 고대와 현대의 방짜수저 제조공정
2.2 미세조직 관찰 및 성분분석
3. 결과 및 고찰
3.1 미세조직 요인
3.2 고대 방짜수저의 중심선 균열
3.3 현대 방짜수저 균열분석을 통한 고대 방짜수저균열원인 분석
3.4 β상 마르텐사이트 취화요인에 의한 균열원인 분석
3.5 방짜수저 균열억제 방안
4. 결 론
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