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Method for mfg. W-Co-Ti hard alloy

A cemented carbide and tungsten-cobalt technology, which is applied in the field of preparation of tungsten-cobalt-titanium cemented carbide, can solve the problems of easy-burning knives, excessive wear of alloy blades, and reducing the bending strength of cemented carbide, so as to solve the problem of easy-burning knives , solve the effect of excessive wear and cost reduction

Inactive Publication Date: 2007-06-13
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of tungsten-cobalt-titanium cemented carbide, which can solve the problems of excessive wear and easy burning of the alloy blade during use, without increasing the content of the bonding metal Co and reducing the amount of tungsten-cobalt-titanium. The cost of cemented carbide
[0005] Since the nature of Ni is close to that of Co, substituting a certain amount of Ni for part of Co will not reduce the bending strength and other properties of the cemented carbide, so it can solve the problems of excessive wear and easy burning of the alloy blade during use; and because it reduces The content of bonding metal Co makes the cost of tungsten-cobalt-titanium cemented carbide of the present invention reduce

Method used

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Experimental program
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Embodiment Construction

[0006] The specific implementation method of the preparation method of the tungsten-cobalt-titanium hard alloy of the present invention includes firstly making the compound carbide, cobalt powder, nickel powder and tungsten carbide powder into a mixture according to certain requirements, and unloading after wet grinding in a ball mill for 70-73 hours , reprecipitated for 24 hours, dried and 100-mesh vibrating sieve, mixed with molding agent, pressed, stripped of molding agent, and sintered at (1470-1480) ° C for 50 minutes.

[0007] Table 1 provides 5 specific examples of the chemical composition of the aforementioned mixture and related batching methods. Table 2 shows the technical conditions of Ni powder added. Table 3 provides the Rockwell hardness and flexural strength values ​​of the tungsten-cobalt-titanium cemented carbide prepared according to the five specific examples in Table 1.

[0008] Table 1

[0009] make up

No

co

(wt%)

Ti...

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PUM

PropertyMeasurementUnit
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Abstract

A hard W-Co-Ti alloy is prepared from WC-TiC, WC powder and Co powder through proportioning them while adding Ni (0.5-2 wt.%), ball grinding, drying, adding formagen, die pressing and sirtening. Its advantages are high antiwear and high-temp. power, and low Co content and cost.

Description

technical field [0001] The invention relates to a preparation method of tungsten-cobalt-titanium hard alloy. Background technique [0002] At present, in the rough machining of carbon steel or alloy steel, blades made of P30 cemented carbide that belong to the ISO standard are generally used. The preparation method of the widely used one in this type of cemented carbide (such as the YT5 cemented carbide produced by Zhuzhou Cemented Carbide Factory) generally includes mixing WC-TiC composite carbide with WC powder and Co powder through batching, ball milling, Steps such as drying, compounding agent, press molding and sintering, wherein the weight ratio of TiC to WC in the complex carbide is 30:70~40:60, the content of bonding metal Co is controlled at (8.9~9.4)wt%, Ti The content is (4.8-5.3) wt%, and the particle size range of the WC powder is selected to be (6.0-8.0) μm. The tungsten-cobalt-titanium cemented carbide produced in this way has good toughness, and its bending...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/04
Inventor 杨星桃屈广林唐受捷
Owner ZHUZHOU HARD ALLOY GRP CO LTD