Hard alloy and manufacturing method thereof

A technology of cemented carbide and manufacturing method, applied in the field of alloy manufacturing, can solve the problems of insufficient hardness, occurrence of holes, poor performance of cemented carbide, etc., and achieve the effect of improving compressive strength and Rockwell hardness HRA.

Active Publication Date: 2017-11-24
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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  • Hard alloy and manufacturing method thereof
  • Hard alloy and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] Such as 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 2h / time, after grinding for 72h, 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 connected to a...

Embodiment 2

[0057] Such as 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 5h / time, after grinding for 54h, 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 device, and t...

Embodiment 3

[0074] Such as 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%, the exhaust operation is carried out at a frequency of 5h / time during the wet grinding process. After grinding for 36h, 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 to a dispersant re...

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Abstract

The invention discloses a manufacturing method of a hard alloy, and in particular, belongs to the field of alloy manufacturing. The manufacturing method is performed according to the steps of: (S1) batching; (S2) wet grinding and screening; (S3) drying: a screened mixture is primarily dried by using a vacuum steam dryer; molding agent gasoline solution is added in the drying process; the primary drying temperature is 60-100 DEG C; the drying time is 3-10 h; and primarily dried mixture powder is dried by 0.5 or more h at a temperature of 100-150 DEG C in a steam drying cabinet; (S4) molding by pressing; (S5) sintering: the mixture powder molded by pressing is sintered by heating through five phase procedures; and (S6) aftertreatment. The invention discloses the hard alloy. The manufacturing method of the hard alloy machines the hard alloy with the Rockwell hardness HRA of at least increasing by 6, the sintering temperature of reducing by at least 800 DEG C and the compressive strength of at least increasing by 200 MPa through the temperature control in the sintering process.

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 Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F3/10
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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