Abstract Superhard materials mainly refer to diamond and cubic boron nitride. Diamond is currently the hardest substance in the world, and cubic boron nitride is second only to diamond. The hardness of these two materials is much higher than the abrasive materials corundum, silicon carbide and tool materials such as cemented carbide, high-speed steel and so on...
Superhard materials mainly refer to diamond and cubic boron nitride. Diamond is currently the hardest substance in the world, and cubic boron nitride is second only to diamond. The hardness of these two materials is much higher than that of abrasive materials such as corundum, silicon carbide, and tool materials such as cemented carbide and high-speed steel. Compared to traditional hard material tools, diamonds have a longer life, less wear and higher efficiency in industrial processes, and have unparalleled advantages in processing hard materials. Luo Baihui, secretary general of the International Association of Mould & Hardware Plastics Industry Suppliers, pointed out that the continued growth and substitution effects of the world's industry in the future will continue to promote the expansion of the artificial diamond industry. Domestic artificial diamond production has grown rapidly, from 1.6 billion carats in 2001 to 9 billion carats in 2010, with an average annual compound growth rate of 16.4%. China's synthetic diamond production accounts for more than 70% of the world's total production. With the continuous maturity of synthetic diamond production technology and the continuous improvement of production, the price of diamond products has shown a long-term downward trend, and the outstanding cost performance has continuously promoted its replacement of traditional hard material tools. Among them, oil exploration drill bits have seen the trend of diamond drill bits replacing other hard material drill bits, which can be proved in the evolution trend of Jiang Diamond shares.
The expansion of downstream applications drives the rapid growth of the synthetic diamond industry. In the last century, about 50% of synthetic diamond was used to make diamond abrasives, but with the advancement of technology and the emergence of new fields of application, the use of synthetic diamonds has rapidly expanded.
On the one hand, product upgrades in existing traditional application areas, that is, penetration from low-end applications to high-end applications, such as the emergence of polycrystalline composite sheets, which have led to the rapid development of diamond tools such as diamond tools, dressing tools, and wire drawing dies. And promotion.
On the other hand is the expansion of new application areas. Among them, the development space in the field of petroleum drill bits has been opened. Compared with roller cone bits, PCD drills have a long service life, which improves drilling efficiency and has significant economic benefits. It is estimated that in the next few years, China will need an average of 40,000 PCD oil drill bits per year. Regardless of the recycling of petroleum drill bits, 30-50 composite pieces are required for each PCD oil drill bit (calculated at a unit price of 200 yuan, conservatively estimated according to the growth rate of 5%. In the next few years, China needs about 1.2 million to 2 million pieces of oil per year. The composite film has a market size of about 240 million to 400 million yuan.
In addition, in the photovoltaic and electronics industries, synthetic diamonds are also beginning to emerge. Among them, wafer cutting and other aspects in the upstream of the electronics industry have been widely promoted in Japan and Taiwan. At present, LEDs, especially sapphire cutting, will be another emerging field of diamond cutting lines.
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