Hard alloy material for preparing bevelling machine special cutter and preparation method thereof

Abstract

The invention discloses a hard alloy material for preparing a bevelling machine special cutter. The hard alloy material is composed of a hard alloy matrix and a coating; the hard alloy matrix is composed of, by mass, 80%-85% of a hard phase, 5%-10% of a bonding phase, 3%-5% of an inhibiting phase and 2%-5% of a hardening phase; the hard phase is composed of, by mass, 65%-71% of tungsten carbide, 22%-28% of titanium carbide and 3%-7% of tungsten boride; the bonding phase is composed of, by mass, 62%-71% of cobalt, 15%-21% of hydroxy nickel powder, 10%-13% of manganese, 3%-5% of hydroxy iron powder and 1%-2% of tungsten powder; the inhibiting phase is composed of, by mass, 80%-87% of vinylene carbonate, 5%-8% of titanium dioxide, 3%-6% of niobium carbide, 3%-6% of tantalum carbide, 1%-3% ofchromium carbide and 0.5%-2% of vanadium carbide; and the hardening phase is composed of, by mass, 51%-60% of zirconium carbide, 25%-42% of green silicon carbide, 4%-9% of yttrium oxide and 3%-7% of zirconium dioxide; and the coating is a titanium nitride-titanium carbonitride-aluminum oxide composite coating.

Description

technical field [0001] The invention relates to the technical field of metal cutting tools, in particular to a cemented carbide material for preparing special cutting tools for beveling machines and a preparation method thereof. Background technique [0002] Cemented carbide cutting tools use high-hardness refractory metal carbide (WC, TiC, etc.) powder as the hard phase, cobalt (Co), nickel (Ni), molybdenum (Mo) Powder metallurgy products sintered in a hydrogen reduction furnace. Carbide cutting tools have the advantages of high hardness, high wear resistance and low cost. The permissible cutting temperature of cemented carbide inserts is as high as 800-1000°С, the hardness at room temperature is 89-93HRA, and 82-87HRA at 540°С. It has good chemical stability and high heat resistance, and has become the choice of modern metal cutting blades important material. [0003] Pipe beveling is an important link in the production of pipe systems. At present, the working principle...

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Problems solved by technology

[0003] Pipe beveling is an important link in the production of pipe systems. At present, the working principle of the beveling machine in beveling the pipe system is to automatically feed the bevel at a 30-degree angle. Since the feed amount cannot be controlled, when the pipe beveling is completed There will be problems with flanging, which affects the quality of the bevel and affects the quality of assembly

Due to the seriousness of the flanging problem, it takes a lot of labor to polish the flanging, which also wastes manpower

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