논문 상세보기
pp.113-117
Effects of annealing temperature on the microstructure and mechanical properties through thickness of a cold-rolled Cu-3.0Ni-0.7Si alloy were investigated in detail. The copper alloy with thickness of 3 mm was rolled to 50 % reduction at ambient temperature without lubricant and subsequently annealed for 0.5h at 200~900 oC. The microstructure of the copper alloy after annealing was different in thickness direction depending on an amount of the shear and compressive strain introduced by rolling; the recrystallization occurred first in surface regions shear-deformed largely. The hardness distribution of the specimens annealed at 500~700 oC was not uniform in thickness direction due to partial recrystallization. This ununiformity of hardness corresponded well with an amount of shear strain in thickness direction. The average hardness and ultimate tensile strength showed the maximum values of 250Hv and 450MPa in specimen annealed at 400 oC, respectively. It is considered that the complex mode of strain introduced by rolling effected directly on the microstructure and the mechanical properties of the annealed specimens.
1. 서 론
2. 실험 방법
2.1 압연 및 어닐링
2.2 특성 분석
3. 결과 및 고찰
3.1 압연에 의해 도입된 두께방향으로의 변형량의 크기
3.2 어닐링에 따른 두께방향으로의 미세조직 변화
3.3 어닐링에 따른 기계적 성질의 변화
4. 결 론
Acknowledgement
References
