Relations between Wear Resistance and Heat Treatment or Structure of High Speed Steels

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Abstract
Relations between the wear resistance and heat treatment conditions or structures of tool steels have not been made clear. In the present paper, studies were made to clarify the wear caused by slidingifriction, using speed steels heat-treated at various temperatures. The results can be summarized as follows: 1) The wear rate at low sliding speeds depended on the hardness of the steels, decreasing with increasing the hardness. At a higher sliding speed it depended on the carbide content in the steel, decreasing with increasing carbide content. 2) A maximum wear rate was obtained for the steels tempered at 300-400°C. 3) At low sliding speeds, the retained austenite increased the wear rate, but did not affect the rate at a higher speed. 4) When the steel is used at a high sliding speed, it should be quenched at lower temperatures and tempered at higher temperatures, even though a lower hardness may be obtained.

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