Several damaged distributors of the shearer’s main pump have been analyzed. Lubricated abrasive wear was found to be the cause of distributor failure. On the basis of selecting reasonably materials and surface strent...Several damaged distributors of the shearer’s main pump have been analyzed. Lubricated abrasive wear was found to be the cause of distributor failure. On the basis of selecting reasonably materials and surface strenthening methods of distributors, pump’s function tests under the condition of contamination were performed with actual distributors. The results showed that wear resistance and contaminant wear lifetime of TiN coated high-speed steel W18Cr4V distributor is the best and TiN coating technology can be used in manufacturing of pump’s distributor.展开更多
The relationship between kaolinite structure and the temperature of thermal transformation of phase was discussed in this paper through grinding and heating treatment. The results show that the structure of kaolinite ...The relationship between kaolinite structure and the temperature of thermal transformation of phase was discussed in this paper through grinding and heating treatment. The results show that the structure of kaolinite is destroyed rapidly with mechanical grinding time, and the kaolinite structure collapses completely after 1 h grinding. The temperature of thermal transformation of phase of decreases with the destruction of kaolinite structure. This result has a great significance for the utilization of kaolinitic rocks in China coal measures.展开更多
文摘Several damaged distributors of the shearer’s main pump have been analyzed. Lubricated abrasive wear was found to be the cause of distributor failure. On the basis of selecting reasonably materials and surface strenthening methods of distributors, pump’s function tests under the condition of contamination were performed with actual distributors. The results showed that wear resistance and contaminant wear lifetime of TiN coated high-speed steel W18Cr4V distributor is the best and TiN coating technology can be used in manufacturing of pump’s distributor.
文摘The relationship between kaolinite structure and the temperature of thermal transformation of phase was discussed in this paper through grinding and heating treatment. The results show that the structure of kaolinite is destroyed rapidly with mechanical grinding time, and the kaolinite structure collapses completely after 1 h grinding. The temperature of thermal transformation of phase of decreases with the destruction of kaolinite structure. This result has a great significance for the utilization of kaolinitic rocks in China coal measures.
