Table 1 Types and application fields of superhard material products Second, the development of China's superhard materials 1. Synthetic diamond Figure 1 China's diamond production growth curve from 1980 to 1997 Previous Next Round nut is a kind of large fastener, which is widely used in hydraulic oil cylinder and railway internal combustion engine equipment, so the relevant performance is also important. If the round nut is of good quality, it can save the cost of locomotive maintenance and reduce the labor intensity of maintenance workers. Round Nut,Round Coupling Nut,Round Head Nut,Round Cap Nut Jiangsu Jiajie Special Screw Co., Ltd , https://www.tzbolts.com
China's first professional manufacturer of synthetic diamond and its products, the sixth grinding wheel factory, was put into operation in 1969, marking the entry of China's synthetic diamond into industrial production. In 1970, China's synthetic diamond production was 460,000 carats. In 1980, the output reached 4.5 million carats, which increased nearly 10 times in 10 years. In 1990, the output was 35 million carats, an increase of about 8 times compared with 1980. After entering the 1990s, China's diamond production has entered a period of rapid development (see Figure 1). This development momentum is mainly driven by the booming development of the stone processing industry. In addition, the use of PCD composite sheets for drilling and cutting and diamond grinding wheels for grinding has also played a significant role. China's synthetic diamond production increased by 14 times between 1990 and 1997, becoming the world's largest producer of synthetic diamonds, and also promoted the development of stone, glass, refractory materials, geological drilling and other industries, and made important contributions to China's economic construction. 