Abstract
The aim of this study was to research the problem of wear localized on the thread joint of a percussive rock drilling tube. Wear of the thread joint causes a decrease in the tightness of the joint and increases the sensitivity of the tube to breakdown. The effect of wear of the thread joint on the endurance of a drilling tube was studied using failure follow-up. As a result of failure follow-up, it was found that the endurance of a drilling tube is primarily dependent on the properties of the material used. The mechanism of wear was studied using replicas and a scanning electron microscope. Three different wear mechanisms were found in the thread joint. The prevalent wear mechanism depends on the fixing moment of the thread joint and the location of the wear phenomenon. Impact wear can be considered to be the dominating factor in the wear process.
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