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      열화된 HK40 강의 마식특성에 관한 연구 = Study on Erosion Characteristics of Aged HK40 Steel

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      https://www.riss.kr/link?id=A30064757

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      The erosion behavior of artificially aged HK40 steel was invested. Erosion tests were conducted at room temperature, 200℃ and 400℃ using Al_2O_3 particles. Erosion rates increased with the increment of temperature. The maximum erosion rate appeared with the impingement angle of 30 degree. The erosion rate increased, reached the maximum at 1000 hours, and after that, decreased with the heat treatment time. The mechanism of erosion seems to be the cutting wear which is very much associated with the strength of material. As results, the erosion rates were rather affected by the tensile strength and the strain hardening coefficient than the hardness and the yield strength. Such changes of material properties would be caused by the change of micro-structure due to the precipitation of carbide and the dissolution of solid element within matrix during the heat treatment.
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      The erosion behavior of artificially aged HK40 steel was invested. Erosion tests were conducted at room temperature, 200℃ and 400℃ using Al_2O_3 particles. Erosion rates increased with the increment of temperature. The maximum erosion rate appeare...

      The erosion behavior of artificially aged HK40 steel was invested. Erosion tests were conducted at room temperature, 200℃ and 400℃ using Al_2O_3 particles. Erosion rates increased with the increment of temperature. The maximum erosion rate appeared with the impingement angle of 30 degree. The erosion rate increased, reached the maximum at 1000 hours, and after that, decreased with the heat treatment time. The mechanism of erosion seems to be the cutting wear which is very much associated with the strength of material. As results, the erosion rates were rather affected by the tensile strength and the strain hardening coefficient than the hardness and the yield strength. Such changes of material properties would be caused by the change of micro-structure due to the precipitation of carbide and the dissolution of solid element within matrix during the heat treatment.

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