Method for preparing quinary P-type hard alloy

Abstract

The invention relates to a method for preparing a quinary P-type hard alloy. The quinary P-type hard alloy consists of the following components in percentage by weight: 16 percent of hard-phase titanium carbide, 8 percent of tantalum carbide, 6 percent of niobium carbide, 10 percent of cobalt, 0.006 percent of lanthanum, and the balance of hard-phase tungsten carbide. The preparation method comprises the following steps: mixing the components, wet-milling the mixture by a tilting wet mill, and discharging the mixture after wet-milling; and waxing and pelletizing the mixture through spray drying, pressing the mixture to form a shape by an automatic press, sintering the mixture in vacuum, and tempering the mixture to obtain a sintered finished product. The product prepared by the method has high bending strength, good impact strength and good red hardness; and when the product is coarsely processed into a large-size alloy forged piece, a cutter is not driven during use, the processing efficiency can be properly improved, and the service life of the cutter is long.

Description

(1) Technical field

[0001] The invention relates to a preparation method of a five-element P-type hard alloy. (2) Background technology

[0002] Large alloy steel forgings such as heavy equipment such as hydropower, thermal power, nuclear power, petroleum cracking and coal liquefaction. Due to the large amount of rough machining and difficult machining of large alloy forgings, it is the bottleneck of the heavy equipment manufacturing industry. The bottleneck in the processing of heavy equipment is mainly caused by the following characteristics: First, the rough casting of large alloy steel forgings needs to be completed. It is free-forged on a large hydraulic press. The weight of a single piece is dozens of tons or hundreds of tons. The forging accuracy cannot be compared with small forgings. Not only its cutting allowance is large, but the surface is uneven, so large alloy steel The cutting workload of forgings is very large. Second, during the natural slow cooling process of la...

Examples

Embodiment Construction

[0015] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments, but the protection scope of the present invention is not limited thereto.

[0016] Refer to figure 1 , A method for preparing a five-element P-type cemented carbide, the five-element P-type cemented carbide is composed of the following components by weight percentage: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, the balance is hard phase tungsten carbide;

[0017] The preparation method includes the following steps: after mixing the components, wet grinding through an inclined wet mill, and discharge after wet grinding; wax injection through spray drying, granulation, automatic press molding, vacuum sintering, and tempering After treatment, a sintered product is obtained.

[0018] In the wet grinding process: the wet grinding time is 60 hours, the ball-to-material ratio is 5:1...

(1) Technical field

[0001] The invention relates to a preparation method of a five-element P-type hard alloy. (2) Background technology

[0002] Large alloy steel forgings such as heavy equipment such as hydropower, thermal power, nuclear power, petroleum cracking and coal liquefaction. Due to the large amount of rough machining and difficult machining of large alloy forgings, it is the bottleneck of the heavy equipment manufacturing industry. The bottleneck in the processing of heavy equipment is mainly caused by the following characteristics: First, the rough casting of large alloy steel forgings needs to be completed. It is free-forged on a large hydraulic press. The weight of a single piece is dozens of tons or hundreds of tons. The forging accuracy cannot be compared with small forgings. Not only its cutting allowance is large, but the surface is uneven, so large alloy steel The cutting workload of forgings is very large. Second, during the natural slow cooling process of la...

Examples

Embodiment Construction

[0015] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments, but the protection scope of the present invention is not limited thereto.

[0016] Refer to figure 1 , A method for preparing a five-element P-type cemented carbide, the five-element P-type cemented carbide is composed of the following components by weight percentage: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, the balance is hard phase tungsten carbide;

[0017] The preparation method includes the following steps: after mixing the components, wet grinding through an inclined wet mill, and discharge after wet grinding; wax injection through spray drying, granulation, automatic press molding, vacuum sintering, and tempering After treatment, a sintered product is obtained.

[0018] In the wet grinding process: the wet grinding time is 60 hours, the ball-to-material ratio is 5:1...

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