Establish the erosive wear mechanism of drilling string in air drilling and put forward that erosion wear is a substantial cause to promote drill string failure.
初步确立了空气钻井钻柱冲蚀磨损机理，提出钻屑冲蚀是促使钻具失效的一项重要原因。
This paper mainly analyses the failure type, wear mechanism and anti-wear materials of the pressing dies for materials choice, design and manufacture of the pressing dies.
本文主要分析了压模的失效形式、磨损机理和耐磨材料，以便为压模材料的选择、设计和制造提供依据。
The failure type and wear-out mechanism of the linings was analyzed based on investigation of wear failure forms of the liners.
通过考察衬板的实际工况和磨损失效形式，分析了衬板的磨损失效类型及其机理。
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