Ultrafine high-bending resistance alloy powder used for diamond tool and preparation method for ultrafine high-bending resistance alloy powder

Abstract

The invention discloses ultrafine high-bending resistance alloy powder used for a diamond tool and a preparation method for the ultrafine high-bending resistance alloy powder. The ultrafine high-bending resistance alloy powder comprises the following components in percentage by weight: 5-75% of Cu, 1-15% of Ni, 1-15% of Sn, 1-5% of Si, 1-15% of Al, 1-10% of Cr, 0.1-3% of B, 0.1-3% of V, 0.1-2% of Nb, 0.1-4% of Zr, 0.1-7% of La and the balance of Fe. According to the preparation method, the prepared metal raw materials are subjected to the following steps of operation: (1), smelting; (2), water atomizing; (3), filter pressing and dewatering; (4), vacuum drying; and (5), restoring. According to the invention, the single power particle component uniformity is improved, and meanwhile, extremely high sintering activity is realized. Especially, micro liquid phase sintering is promoted due to the added low-melting point elements, so that higher density is obtained by a diamond tool bit sintering mould, and the holding force on diamond is enhanced. By adding the metal-structure intensifying alloy elements and rare earth elements, the bending resistance is improved to 1900 Mpa, so that the holding force of the mould on the diamond is finally improved, and the diamond tool bit tool with high cutting performance is obtained.

Description

technical field [0001] The invention relates to the technical field of diamond tool preparation, in particular to an ultrafine high-bending-strength alloy powder for diamond tools and a preparation method thereof. Background technique [0002] The cutting mechanism of diamond tools is to use the hardness of diamond to cut hard materials, such as stone, refractory materials, ceramics, semiconductors, concrete, etc. Due to the impact of the diamond during the cutting process, part of the carcass surrounded by the diamond is destroyed, causing the diamond to fall off. Therefore, how to enhance the holding force of the diamond cutter head carcass to the diamond so that the diamond will not fall off prematurely during cutting, thereby improving the cutting efficiency and working life of the diamond tool is a recognized problem in the industry. At present, mixed metal powder or water-atomized alloy powder is mostly used as the raw material of the matrix powder, which is mixed wit...

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Problems solved by technology

But there are two disadvantages. One is that the price of Ni is also relatively expensive. In order to reduce the manufacturing cost, the content of Ni can only be reduced; When processing medium and high hardness materials, insufficient bending strength, insufficient toughness, excessive wear of the carcass, and insufficient holding force on the diamond often occur, resulting in low tool life. Therefore, the bending strength of the carcass must be increased to improve the carcass. Impact and wear resistance, and enhance the holding force of diamond

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