pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (31권5호 262-266)
Effect of Heat Treatment on the Mechanical Properties of Investment Casting Turbo Charger Wheel using A356 Alloy
A356합금을 이용한 정밀주조 Turbo Charger Wheel의 기계적 특성에 미치는 열처리의 영향
Sang-Mi Kim, Kee-Do Woo†, Ji-Young Kim, Sang-Hyuk Kim, Sang-Hoon Park, Hwang-Jin Kang*, Chan-Sung Park*
Chonbuk National University, *NiB Materials Co.
The aim of this study is to investigate aging behavior of A356 alloy for turbo charger part. The specimen was fabricated by investment casting. Solution heat treatment was performed at 525oC for 8h and followed by aging treated at 160oC, 170oC for 0.5~20h. And their microstructures and mechanical properties of the aged specimens were analyzed by scanning electron microscope and hardness tester, respectively. All the cast A356 alloy included eutectic Si particles. In the cast A356 alloy, eutectic Si phase mainly was formed along Chinese script phase. Vickers hardness of the cast was improved by aging treatment due to formation of β” phase and β’ phase.
A356 alloy, Turbo charger wheel, Aging treatment, Differential scanning calorimetry.
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