Zou Wenjun: Research and Application Report of Superhard Abrasives

Zou Wenjun, Dean of School of Materials, Henan University of Technology

On the other hand, product structure adjustment began to show results: high-end products gradually expanded market share. According to export statistics, the export products of abrasives and abrasives in 2011~2012, regardless of the year-on-year increase or decrease, the export value has a considerable amount compared with the same period of last year. The growth of the average price also has a different proportion of growth. With the continuous appreciation of the renminbi and the pressure on foreign trade exports, prices have kept rising. There is only one explanation, that is, the export volume of high-quality products has increased. The export value of high-grade abrasives increased significantly, and the domestic market share also increased significantly.

The overall development trend of international superhard abrasives: the development of grinding technology puts new demands on abrasive tools. High-speed CNC machining technology is an important part of advanced manufacturing technology, representing the advanced level of CNC machining in the world today. The development direction of CNC machining. High-efficiency precision grinding tools are one of the important foundations for high-speed and high-efficiency CNC grinding technology. High-speed CNC machining has the characteristics of high speed, high efficiency and high precision. It puts forward a series of requirements for the abrasive tools that are much higher than the general abrasive tools: safety performance, tissue and hardness uniformity, manufacturing precision and shape retention of the working layer. Properties, balance performance, grinding efficiency, durability, service life, surface quality of the workpiece, and stability of the quality of the tool.

Superhard abrasives (including diamond abrasives, cubic boron nitride (CBN) abrasives) have the advantage that other abrasive tools can not replace, and can meet the development requirements of high-speed CNC grinding processing, so the following development trend has emerged: diamond Abrasives replace ordinary silicon carbide abrasives; CBN abrasives replace ordinary corundum abrasives. The high-grade products of superhard abrasive products are mainly developed in the direction of “faster, more refined, thinner, thicker, smaller, larger, thinner and more durable”. High speed and super high speed: The actual speed of CBN grinding wheel can reach 15-~250m/s, and the laboratory speed reaches 500m/s.

Development and application technology of superhard materials and abrasives: 1. Deep processing of abrasives, automation of production equipment is gradually promoted in enterprises; 2. Ordinary abrasives are replaced by superhard materials and products; 3. New materials technology continues to emerge; The requirements for high-grade decorations (gems, crystals, glass) are constantly increasing; 5. Resin-type grinding wheels are gradually replaced by sanding discs; 6. High-speed resin cutting sheets are replaced by metal resin CBN cutting sheets; 7. Steel paper grinding sheets are plated. Diamond grinding tablets are gradually being replaced.