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The reason why diamond composite blades are so widely used in today's industrial society is mainly because diamond composite blades have unparalleled performance compared to other materials. Today, let's analyze the superior performance of diamond composite blades:
1. Diamond composite blades have very high hardness and wear resistance (wear ratio). The hardness of diamond composite blades reaches about 10,000 HV, making them the hardest man-made material in the world currently, much harder than cemented carbide and engineering ceramics. Due to their extremely high hardness and isotropy, they have excellent wear resistance. Generally, wear resistance of composite blades is reflected by the wear ratio. In the mid-1980s to 1990s, the wear ratio of composite blades was 40,000 to 60,000 (abroad 80,000 to 120,000); from the mid-1990s to now, the wear ratio of composite blades is 80,000 to 300,000 (abroad 100,000 to 500,000).
2. Diamond composite blades have thermal stability. The thermal stability of diamond composite blades determines their range of use. Thermal stability refers to heat resistance and, like strength and wear ratio, is an important performance indicator for measuring the quality of diamond composite blades. Thermal stability means that when heated to a certain temperature in an atmospheric environment (with oxygen present) and then cooled, the chemical stability of the polycrystalline layer (degree of diamond graphitization), changes in macroscopic mechanical properties, and the effect on the bonding strength of the composite layer interface are maintained. After sintering at 750°C, some domestic manufacturers' products show a 5% to 20% increase in wear ratio, with little change in impact toughness; some manufacturers' products show a decrease in wear ratio and impact toughness, which is related to the different formulas and processes used by each unit. The wear ratio and impact toughness of foreign diamond composite blades show little change before and after sintering.
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