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      18Ni 마르에이징 강의 기계적 성질에 미치는 시효처리의 영향 = Effect of Aging Treatment on the Mechanical Properties of a 18Ni Maraging Steel

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      https://www.riss.kr/link?id=A3073069

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      Effects of aging treatment on the mechanical properties of a 18 Ni maraging steel were investigated by considering the reverted austenite. Specimens were heat treated by austenitizing at 840℃ for 1 hr and then aged for various times at 480℃ and 520℃. The main results obtained are as follows : 1) The amounts of reverted austenite are increased up to about 4% at 480℃ and about 22% at 520℃ with 1 to 48 hrs aging time. 2) Decreasing tendencies of impact energy and fracture toughness with increasing aging time are diminished after aging for 2 hrs at two aging temperatures of 480℃ and 520℃. 3) Peak hardness and yield strength are obtained after aging for 4 hrs at 480℃ and 2 hrs at 520℃ respectively. From the above results, it was concluded that the optimum aging condition with which showed good strength and toughness combination are given to be 480℃ for 4 hrs and 520℃ for 2 hrs.
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      Effects of aging treatment on the mechanical properties of a 18 Ni maraging steel were investigated by considering the reverted austenite. Specimens were heat treated by austenitizing at 840℃ for 1 hr and then aged for various times at 480℃ and 52...

      Effects of aging treatment on the mechanical properties of a 18 Ni maraging steel were investigated by considering the reverted austenite. Specimens were heat treated by austenitizing at 840℃ for 1 hr and then aged for various times at 480℃ and 520℃. The main results obtained are as follows : 1) The amounts of reverted austenite are increased up to about 4% at 480℃ and about 22% at 520℃ with 1 to 48 hrs aging time. 2) Decreasing tendencies of impact energy and fracture toughness with increasing aging time are diminished after aging for 2 hrs at two aging temperatures of 480℃ and 520℃. 3) Peak hardness and yield strength are obtained after aging for 4 hrs at 480℃ and 2 hrs at 520℃ respectively. From the above results, it was concluded that the optimum aging condition with which showed good strength and toughness combination are given to be 480℃ for 4 hrs and 520℃ for 2 hrs.

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