Super-hard material and preparation method thereof

A technology for superhard materials and alloys, applied in the field of superhard materials and their preparation, can solve the problems of insufficient toughness, temperature resistance, wear resistance, corrosion resistance, and anti-stickiness, and achieve simple manufacturing, improved strength and Fracture toughness, effect for a wide range of applications

Inactive Publication Date: 2012-01-25
四川欧曼机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the toughness, temperature resistance, wear resistance, corrosion resistance, and anti-sticking properties of traditio

Method used

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  • Super-hard material and preparation method thereof
  • Super-hard material and preparation method thereof
  • Super-hard material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0029] Simultaneously, the present invention proposes a kind of preparation method of superhard material, and this method comprises the following steps:

[0030] Step 1: Prepare a mixed alloy, mix powders of different components of the mixed alloy according to the designed ratio, and the mixed alloy is at least 5 combinations of aluminum, chromium, copper, iron, manganese, titanium, vanadium, cobalt, nickel and carbon The obtained alloy, where each element accounts for 5 to 35 mol% of the mixed alloy, is mixed and ball milled to fully mix the different components to form a mixed alloy powder, and the ball milling time is 10-20 hours;

[0031] Step 2: Mix at least one ceramic phase powder and mixed alloy powder to form a mixture, the ceramic phase is tungsten carbide or titanium carbide, the weight percentage of ceramic phase powder and mixed alloy powder is: ceramic phase powder: 80-85%; mixed alloy : 15-20%;

[0032] Step 3: The mixture is pressed and sintered to form a supe...

Embodiment 1

[0034] In this example, a variety of pure metal or alloy powders are mechanically milled to form mixed alloy powders, and then the mixed alloys and tungsten carbide powders are mixed and ball milled in different proportions to make them uniformly mixed composite material powders. . Then the uniform tungsten carbide-mixed alloy mixed powder is pressed and sintered at high temperature to make a superhard material sintered body, and finally the sintered body is tested and analyzed. In this embodiment, seven kinds of pure metal powders of aluminum, chromium, copper, iron, manganese, titanium and vanadium are used to make multivariate high-entropy alloy powders, and the contents are as follows:

[0035]

[0036] The prepared powder is ball milled for 18 hours to obtain a mixed alloy powder, and then mixed with tungsten carbide powder according to the ratio in the table below, mechanically ball milled and pressed and sintered. The hardness of the sintered material is shown in the...

Embodiment 2

[0040] In this example, six kinds of pure metal or alloy powders are mechanically milled to form mixed alloy powders, and then the mixed alloys and tungsten carbide powders are mixed and ball milled in different proportions to make them uniformly mixed composite material powders. . Then the uniform tungsten carbide-mixed alloy mixed powder is pressed and sintered at high temperature to make a superhard material sintered body, and finally the sintered body is tested and analyzed. In this embodiment, seven kinds of pure metal powders of aluminum, chromium, copper, iron, manganese, titanium and vanadium are used to make multivariate high-entropy alloy powders, and their contents are shown in the following table:

[0041]

[0042] After the prepared powder is ball milled, it is mixed with tungsten carbide powder according to the ratio in the table below, mechanically ball milled and pressed and sintered. The hardness of the sintered material is shown in the table below. In the...

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Abstract

The invention discloses a super-hard material and a preparation method thereof. The super-hard material comprises at least one kind of ceramic phase powder and mixed alloy; the mixed alloy consists of at least five of aluminum, chromium, copper, iron, manganese, titanium, vanadium, cobalt, nickel and carbon, and each element accounts for 5 to 35 percent of the mixed alloy; the super-hard material comprises the following components in percentage by weight: 80 to 85 percent of ceramic phase powder, and 15 to 20 percent of mixed alloy; and because the multi-element alloy is used as a bonding phase of the super-hard material, the bonded metals can obtain temperature-resistant micro structure and hardness, and the hardness and the temperature and abrasion resistance of the whole ceramic phase composite material are improved. In addition, by using the slow diffusion effect, when the bonded metals are sintered into liquid phases, atoms are not easily transmitted and diffused, growth of ceramic phase grains such as tungsten carbide, titanium carbide and the like can be inhibited, and decrease of hardness, toughness, temperature resistance and abrasion resistance of a sintered body is further avoided.

Description

technical field [0001] The invention relates to the field of composite materials, and more particularly relates to a superhard material and a preparation method thereof. Background technique [0002] Superhard materials have been developed since the beginning of the last century. Because of their high hardness, high temperature resistance, wear resistance and other advantages, they are widely used in various industries, and they are mainly carbide-based superhard materials. [0003] Under normal circumstances, superhard materials are composed of a variety of different compositions, which generally include the composition of ceramic phase particles such as carbides with very high melting point and hardness but easy to be brittle, and the combination phase with low hardness and high toughness. Composition, the bonding metals commonly used in existing superhard materials use cobalt, nickel or nickel-molybdenum alloy as the bonding phase. By sintering the components, the bonding...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/00
Inventor 李梁
Owner 四川欧曼机械有限公司
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