High-performance hard alloy and manufacturing method thereof

Abstract

The invention discloses high-performance hard alloy and a manufacturing method thereof. The high-performance hard alloy mainly comprises the following components in percentage by weight: 5 to 10 percent of Co powder, 4 to 7 percent of Co-Al powder, 3 to 5 percent of CK29 powder and the balance of WC powder and inevitable impurities. The manufacturing method comprises the following technological steps of: (1) preparing: preparing materials according to the weight percentage; (2) wet grinding: adding the prepared raw materials into a high-energy ball mill and performing wet grinding for 67-77 hours by using alcohol so as to refine the materials until nano-composite degree; (3) drying: drying the ground mixed materials in a drying tower; (4) forming: adding an adhesive, pelleting and pressing into the shape of the product; and (5) sintering: vacuum-sintering the formed product at 1,430-1,460 DEG C and preserving heat for 15-25 minutes to prepare the high-performance hard alloy product. After the hard alloy provided by the invention is adopted, the hot red hardness is enhanced, and the product has the advantages of excellent corrosion resistance, good mechanical property and wear resistance and the like.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a high-performance cemented carbide capable of enhancing hot red hardness, corrosion resistance and wear resistance and a manufacturing method thereof. Background technique [0002] my country is a big producer of cemented carbide. It accounted for about 38% of the world's total output in 2011, but its output value was less than 20% of the world's. Mainly low-end products, the proportion of high value-added products is very low, and the international competitiveness is not strong. Secondly, there is a large gap between the investment in science and technology and the international advanced enterprises, the lack of high-level technical personnel, the lack of basic research, the relative disconnection between production, education and research, and the lack of scientific and technological innovation, mainly following the international advanced technology. [0003] With the accelera...

AI Technical Summary

Problems solved by technology

[0007] But judging from the current work, it is impossible to achieve the comprehensive effect of improving corrosion resistance and refining grains.

Neither the use of nickel as the bonding metal nor the addition of Cr can fundamentally solve the problem of corrosion resistance; the addition of a grain growth inhibitor will reduce the performance of the alloy, and the finer the powder, the more difficult it is to achieve a uniform distribution of the inhibitor, which will cause WC grains abnormal growth

For this reason, in order to produce superhard cemented carbide, new formulas and processes must be sought. Many manufacturers and people of insight have developed and developed it, but there is no ideal solution so far.

Images