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      • 精密測定 計器用 Stainless Steel의 加工과 熱處理에 따른 諸性質의 變化

        李宗炫,安辛根,金學信 全北大學校 1988 論文集 Vol.30 No.-

        In order to study the change of properties in Fe-13.3% Cr-0.37%C martensitic stainless steel for precision measuring gauge with the various heat treatments and plastic working, the change of micostructure, hardness and wear resistance were investigated. The results obtained in this experiment are as follows: 1. The high Cr alloy of 13% Cr martensitic stainless steel has selfhardening property which is not remarkably affected by the cooling rate, and also the hardness of this alloy was the highest value in the case of oil quenching after austenitized at 1000℃ for 1/3 hour. 2. The hardness and the corrosion resistance of low temperature tempering treatment are superior to high temperature tempering, especially the hardness of 200℃×2hr tempering treatment are superior to high temperature tempering, especially the hardness of 200℃×2hr tempering treatment in the case of air cooling after austenitized at 1050℃ for 1/3 hour is excellent. 3. The amount of retained austenite hardly existed in the case of air cooling after austenitized at 1000℃ for 1/3 hour, and the increase of hardeness with subzero-treatment is very small. 4. The property of hot working is good but the property of cold working is poor. And then, the secondary hardening with reheating treatment appeared at 400~450℃. 5. Bainite trasformation was occurred in the isothermal heat treatment, and the hardness and the wear resistnace of marquenching treatment are higher than martempering treatment. 6. The elevation of the wear resistance is proportional to the increase of the hardness obtained from the various heat treatments, especially the wear resistance of 200℃×2hr tempering treatment after air cooling is effective than after oil quenching and the wear mechanism is mainly a grinding abrasion.

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