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Vol.35, No.12, 1734 ~ 1744, 1997
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| Title |
| Studies on the Oxidation and Wear Resistance of the Duplex Treated AISI H13 Steel |
| 정재원 , 박홍진 , 한전건 , 이종훈 , 이상율 Jae Won Chung , Hong Jin Park , Jeon Gun Han , Jong Hun Lee , Sang Yul Lee |
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| Abstract |
| The effects of the duplex treatment on the isothermal oxidation and high temperatures wear resistance of AISI H13 steel were investigated in this work. High temperature wear tests at 500℃ were performed under no lubricant condition in air using a ball-on-disk type tribotester and measurements of oxidation resistance of the duplex treated specimens at 700℃ and 900℃ were obtained by isothermal oxidation test in air. Experimental results showed that oxidation behaviours of duplex treated H13 steel was remarkably dependent upon the type of the intermediate layer between the duplex-treated layer and the substrate. The duplex type A specimen, which has calorized layer as an intermediate layer, did not show any serious oxidation and only partial fracture of the duplex treated layer was observed after 100hours. On the contrary, duplex type B specimen, which has nirided layer as an intermediate layer, showed rapid oxidation of the duplex treated layer even after only 20 hours exposure at 900℃ and the duplex treated layer were completely detached from the base metal after exposure to 900℃ for 50 hours. Among three specimens, only plasma nitrided specimen showed the worst oxidation resistance. From the wear test at 500℃, the wear volume was calculated and the minimum weight loss in duplex type A specimen and the minimum weight loss in the plasma nitrided specimen were measured. The maximum wear depths of wear scars were measured to be approximately 60㎛ for duplex type A, 70㎛ for type B, and 100㎛ for the plasma nitrided specimen. |
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