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Polycrystal hard alloy material with high strength and ductility and high abrasive resistance

A technology of cemented carbide and wear resistance, applied in the field of cemented carbide, can solve the problems of high hardness, high wear resistance and high toughness, small mean free path of Co phase, low fission resistance, etc., and achieve excellent The effect of mechanical properties, uniform distribution, and excellent hardness

Inactive Publication Date: 2018-02-27
河源富马硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Correspondingly, because the hard phase is too fine and the mean free path of the Co phase is small, the deformability is poor, and the metallographic structure is uniform, and the fission resistance is low
Therefore, there is a contradiction between high hardness, high wear resistance and high toughness in this kind of cemented carbide products with uniform metallographic structure.

Method used

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  • Polycrystal hard alloy material with high strength and ductility and high abrasive resistance

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Experimental program
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Effect test

Embodiment 1

[0016] A polycrystalline cemented carbide material with high strength, toughness and high wear resistance. The cemented carbide material is composed of a hardening phase, a binding phase and a forming agent. In terms of mass fraction, the hardening phase is 88%, the binding phase is 10%, and the forming The dosage is 2%, as shown in Table 1.

[0017] Table 1:

[0018]

[0019] The hard alloy material is obtained through the following process, weighing the hardening phase, binder phase and molding agent, and uniformly mixing them to form a mixture, then pressing the mixture under a pressure of 480MPa to obtain a green compact, and then pressing the The billet is at a temperature of 1500°C and a vacuum degree of less than 1×10 -3 Sinter under the condition of Pa for 2 hours, then place it under Ar atmosphere at 1400°C and 110MPa for 2 hours, and then cool naturally to room temperature.

Embodiment 2

[0021] On the basis of the formula of Example 1, the cemented carbide material is obtained through the following process, weighing the hardening phase, binder phase and molding agent, and uniformly mixing it to form a mixture, and then mixing the mixture under a pressure of 500MPa Press molding to obtain compacts, and then press the compacts at a temperature of 1520°C and a vacuum degree of less than 1×10 -3 Sintering under the condition of Pa for 1 hour, then sintering under Ar atmosphere at 1350°C and 120MPa for 2 hours, and then naturally cooling to room temperature.

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Abstract

The invention discloses a polycrystal hard alloy material with high strength and ductility and high abrasive resistance. The hard alloy material is composed of a hardening phase, a bonding phase and amolding agent; according to the mass fraction, the hardening phase accounts for 88%-92%, the bonding phase accounts for 6%-10%, and the balance is the molding agent; and the hardening phase is composed of WC powder, B4C, (Ta,Nb)C, Mo2C, VC, TiC raw materials, and the bonding phase comprises B powder, Fe powder, carbonyl Ni powder and Co powder raw materials. According to the polycrystal hard alloy material, the ingredients of an alloy are adjusted to enable WC grains in the prepared hard alloy to be wee, even in distribution and high in density, the hard alloy material shows more excellent mechanical property, the red hardness of the hard alloy is avoided, and the contradiction that the hardness, the strength and the abrasive resistance of the hard alloy are difficult to coordinate is avoided. In addition, parameters such as the formula of a mixture, the sintering temperature and the sintering time are adjusted for controlling the crystalline state of a gradient layer of the hard alloy, the grains in the hard alloy are wee, the excellent hardness, abrasive resistance and ductility are achieved, and the hard alloy material can be used for metal machining.

Description

technical field [0001] The invention belongs to the technical field of hard alloys, in particular to a polycrystalline hard alloy material with high strength, toughness and high wear resistance. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide is widely used as tool material, such as turning tools, milling cutters, planers, drills, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used for cutting Difficult-to-machine materials such as heat-resistant steel, stainless steel, high manganese steel, and tool steel. Now the cutting speed of the new cemented carbide tool is hundreds of times that of carbon steel. [0003] Cemented carbide material consists of two parts: one part is the hardening phase and the other part is the bonding metal. The hardening p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C1/05B22F3/02B22F3/10
CPCC22C1/051C22C29/067B22F3/02B22F3/1017B22F2998/10B22F1/103
Inventor 王忠平郭光富罗海鹏柏飞
Owner 河源富马硬质合金股份有限公司
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