한국주조공학회지 (Journal of Korea Foundry Society)
- 제11권5호
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- Pages.392-397
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- 1991
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
오스템퍼드 주강의 미세조직과 기계적 성질
Microstructures and Mechanical Properties of Austempered Cast Steel
초록
This study has been performed to investigate the austempering heat treatment response and mechanical properties of a high carbon(0.9%), silicon(1.5-4.5%)-alloyed cast steel, with a chemical composition similar to that of the matrix of a ductile cast iron. Tensile and hardness tests were used to evaluate the effects of a wide variety of austempering heat treatment variables. SEM metallography and X-ray measurements of stabilized austenite were also performed for all the specimens employed. The austempered microstructures which contain up to 39% stabilized austenite were obtained. Mechanical properties and microstructures depended primarily on the austempering time and temperature. The optimum mechanical properties were obtained at the chemical compositions of 0.9% C and 2.5% Si.
키워드