In recent years, with the continuous development of cutting workpiece materials, especially the emergence of some difficult-to-machine materials, super-hard material tools have been more and more widely used. The number, scale and manufacturing level of domestic super-hard material tool manufacturers are all It is improving rapidly. The superhard materials and products exhibition area of ​​the 2011 China (Zhengzhou) International Abrasives Grinding Exhibition held on November 11-13, Henan Fenike, Zhengzhou Bote, Zhengzhou Sanmao, Zhengzhou Diamond, Zhongnan Diamond, Zhengzhou Dozens of superhard materials and tool manufacturers, such as Huajing, have shown the rapid development and tremendous progress of domestic superhard materials to the audience.
In the current tool market, the tool materials occupying the largest market share are still high-speed steel and hard alloy, but the hardness of these tools is only 2000-3000HV. If the bonding material is added, the overall hardness is below 2000HV. For difficult materials and high speed and high precision machining, lower hardness tool materials are no longer suitable. Ultra-hard material tools represented by diamond and cubic boron nitride (CBN) quickly occupied this market. Among them, diamond has extremely high hardness and wear resistance, and its hardness can reach 10000HV, which is the hardest in tool materials, and its thermal stability can reach 700°C～800°C. Cubic boron nitride is second only to diamond (up to 8000 HV to 9000 HV) and has higher thermal stability (up to 1250 ° C to 1350 ° C).
In the interview, the reporter learned that superhard material tools have the characteristics of high processing efficiency, long service life and good processing quality. In the past, they were mainly used for finishing. In recent years, due to the improvement of the production process of artificial superhard tool materials, the control has been carried out. Raw material purity and grain size, using composite materials and hot pressing process, the application range is expanding, in addition to general finishing and semi-finishing, it can also be used for roughing, which is recognized internationally as a productivity increase. One of the most promising tool materials. Using ultra-hard materials to process steel, cast iron, non-ferrous metals and their alloys, cutting speed can be an order of magnitude higher than that of hard alloys, and tool life can be tens or even hundreds of times higher than that of hard alloys. At the same time, its appearance also changes the traditional process concept. With super-hard tools, it can often be directly milled or milled (or polished). For hardened parts processing, a single process can be used instead of multiple processes, which greatly shortens the process. .
Zhang Taihe, chief engineer of Henan Fenike Superhard Materials Co., Ltd., told the reporter that the diamond material cutter has extremely high hardness and wear resistance, and can effectively process non-ferrous metals such as copper and aluminum, alloys thereof, ceramics, and hard sintered. Alloys, various fiber and particle reinforced composites, etc. Compared with diamond, cubic boron nitride has higher thermal stability, strong chemical inertness to iron group elements, strong anti-bonding ability, and is more suitable for processing various hardened steels, thermal spray materials, chilled cast iron and HRC35. Hard-to-cut materials such as cobalt-based and nickel-based.
Nowadays, the advantages of super-hard material cutting tools in cutting processing have been well known by users, and have been more and more widely recognized and applied, and the market demand is huge. From the perspective of superhard materials, China has obvious resource advantages. Diamond production accounts for more than 80% of the world's total output. Cubic boron nitride (CBN) production accounts for more than 60% of the world's total output. It is already the world's largest super. In the hard material producing countries, China has entered the ranks of world powers in terms of superhard materials. China's superhard materials industry has taken the lead in becoming one of the industries with international voice. However, in fact, the domestic super-hard material tools are still in the initial stage of development and growth. Some enterprises are working hard toward high-end, precision super-hard material tools, and have achieved many achievements, but still can not meet the growing market demand. In the future tool market, super-hard material tools will occupy a more important market position.
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