As one of the most dynamic economic zones in China, the Yangtze River Delta has further increased its economic output,becoming more open to foreign investment and international cooperation over the past 30 years.Its e...As one of the most dynamic economic zones in China, the Yangtze River Delta has further increased its economic output,becoming more open to foreign investment and international cooperation over the past 30 years.Its economic stability and coordination have been strengthened;and the process of regional integration continues to accelerate.展开更多
Much of China＇s health assistance is used to expand Africa＇s capacity to be self- sufficient and boost its own economic development. China is supporting Africa＇s health progress through its investments in health re...Much of China＇s health assistance is used to expand Africa＇s capacity to be self- sufficient and boost its own economic development. China is supporting Africa＇s health progress through its investments in health research and development,展开更多
A new type electrospark alloying(ESA ) machine and the characteristics of the ESAed layer was investigated using WC (8%Co ) as the electrode material and AISI1045 (0. 45%C) as the substrate material. The test results ...A new type electrospark alloying(ESA ) machine and the characteristics of the ESAed layer was investigated using WC (8%Co ) as the electrode material and AISI1045 (0. 45%C) as the substrate material. The test results indicate that the new type mahcine produces a high coating rate, a stable coating process, and a satisfying coating surface, etc. The major phases of the coating are M6C type (Fe3W3C,Co3W,C,etc. )carbides which contribute to the high hardness (about HV0.051 400~ 1 500) and high wear-resistance of the ESAed surface layer.展开更多
文摘As one of the most dynamic economic zones in China, the Yangtze River Delta has further increased its economic output,becoming more open to foreign investment and international cooperation over the past 30 years.Its economic stability and coordination have been strengthened;and the process of regional integration continues to accelerate.
文摘Much of China＇s health assistance is used to expand Africa＇s capacity to be self- sufficient and boost its own economic development. China is supporting Africa＇s health progress through its investments in health research and development,
文摘A new type electrospark alloying(ESA ) machine and the characteristics of the ESAed layer was investigated using WC (8%Co ) as the electrode material and AISI1045 (0. 45%C) as the substrate material. The test results indicate that the new type mahcine produces a high coating rate, a stable coating process, and a satisfying coating surface, etc. The major phases of the coating are M6C type (Fe3W3C,Co3W,C,etc. )carbides which contribute to the high hardness (about HV0.051 400~ 1 500) and high wear-resistance of the ESAed surface layer.
