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A kind of cemented carbide and its manufacturing method

A technology of hard alloy and manufacturing method, which is applied in the field of alloy manufacturing, can solve problems such as insufficient hardness, holes, and high sintering temperature, and achieve the effect of increasing Rockwell hardness HRA and improving compressive strength

Active Publication Date: 2018-12-28
GANZHOU WHISKAS ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hard alloys currently on the market have poor performance due to poor processing technology, such as: insufficient hardness, high sintering temperature, and holes, etc.

Method used

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  • A kind of cemented carbide and its manufacturing method
  • A kind of cemented carbide and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like figure 1 As shown, a kind of cemented carbide is provided in the embodiment, implement according to the following steps:

[0041] S1 ingredients: Take 85 parts of tungsten carbide powder, 15 parts of cobalt powder, and 0.6 part of tantalum carbide with the average particle size of the raw materials being 10 μm, and add them into the mixing chamber for preliminary mixing to obtain the ingredient mixture;

[0042] S2 Wet milling and sieving: transfer the ingredient mixture to a ball mill for wet milling, the ball mill rotating speed is 30r / min, add methanol with a mass fraction of 98% in 5 times while grinding, and the addition amount is 1 / 2 of the volume of the ingredient mixture 30%, during the wet grinding process, the exhaust operation is carried out at a frequency of every 2 hours. After grinding for 72 hours, pass through a 320-mesh sieve to obtain a sieved mixture;

[0043] S3 drying: the sieved mixture is preliminarily dried using a vacuum steam drier connec...

Embodiment 2

[0057] like figure 1 As shown, a kind of cemented carbide is provided in the embodiment, implement according to the following steps:

[0058] S1 ingredients: Take 86 parts of tungsten carbide powder, 14 parts of cobalt powder, and 0.4 part of niobium carbide with an average particle size of 10 μm and add them into the mixing chamber for preliminary mixing to obtain the batching mixture;

[0059] S2 Wet milling and sieving: transfer the ingredient mixture to a ball mill for wet milling, the ball mill speed is 40r / min, and add ethanol with a mass fraction of 98.8% in 4 times while grinding, and the addition amount is 2% of the volume of the ingredient mixture 40%, during the wet grinding process, the exhaust operation is carried out at a frequency of every 5 hours. After grinding for 54 hours, pass through a 320-mesh sieve to obtain a sieved mixture;

[0060] S3 drying: the sieved mixture is preliminarily dried using a vacuum steam drier connected to a dispersant recovery devic...

Embodiment 3

[0074] like figure 1 As shown, a kind of cemented carbide is provided in the embodiment, implement according to the following steps:

[0075] S1 ingredients: Take 87 parts of tungsten carbide powder, 13 parts of cobalt powder, and 0.2 part of chromium carbide with an average particle size of 8 μm and add them into the mixing chamber according to the proportion for preliminary mixing to obtain the batching mixture;

[0076] S2 Wet milling and sieving: transfer the ingredient mixture to a ball mill for wet milling, the ball mill speed is 50r / min, and add methanol with a mass fraction of 99% in 3 times while grinding, and the addition amount is the volume of the ingredient mixture 50%, during the wet grinding process, the frequency of processing once every 5 hours is used for exhaust operation. After grinding for 36 hours, pass through a 320-mesh sieve to obtain a sieved mixture;

[0077] S3 drying: the sieved mixture is preliminarily dried using a vacuum steam drier connected t...

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Abstract

The invention discloses a method for manufacturing cemented carbide, which specifically belongs to the field of alloy manufacturing, and is carried out according to the following steps: S1 batching; S2 wet grinding and sieving; S3 drying: the sieved mixture is preliminarily dried using a vacuum steam drier, and Add molding agent gasoline solution during the drying process, the preliminary drying temperature is 60-100°C, and the drying time is 3-10h; use a steam drying cabinet to dry the mixture powder at a temperature of 100-150°C for no less than 0.5h ; S4 compression molding; S5 sintering: sintering the compression-molded mixture powder using five-stage temperature programming; S6 post-processing. The invention discloses a cemented carbide. The manufacturing method of the cemented carbide provided by the present invention controls the temperature in the sintering process to process the cemented carbide with the Rockwell hardness HRA increased by at least 6, the sintering temperature decreased by at least 800°C, and the compressive strength increased by at least 200MPa.

Description

technical field [0001] The invention belongs to the field of alloy manufacturing, and more specifically relates to a cemented carbide and a manufacturing method thereof. Background technique [0002] Cemented carbide is a kind of high-efficiency tool material and structural material. It is mainly used in the wear-resistant technology fields of engineering machinery such as CNC machine tool precision machining tools, molds and construction. It has played an important role in promoting the development of industry and technological progress. [0003] The hard alloys currently on the market have poor performance due to poor processing technology, such as: insufficient hardness, high sintering temperature, and holes. Contents of the invention [0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a method for manufacturing cemented carbide, which can process cemented carbide with excellent properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10
CPCC22C1/051C22C29/067C22C29/08B22F3/1017B22F2998/10B22F1/0003B22F1/102B22F2003/247B22F2003/248B22F3/02B22F2009/043
Inventor 王征东王远忠
Owner GANZHOU WHISKAS ALLOY
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