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Granular material and preparation method thereof

A technology of pellets and carcass, applied in the field of superhard materials, which can solve problems such as complex equipment, easy fall-off of the carcass, and environmental pollution

Active Publication Date: 2016-10-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The steps of the layer coating method used in the prior art are relatively cumbersome, the required equipment is complicated, and a large amount of organic solvents and dust are used in the preparation process, which is easy to cause pollution to the environment
In addition, in the diamond pellets coated with the tire layer prepared by the existing tire layer coating technology, the bonding force between the tire layer and the diamond material is poor, and the tire layer is easy to fall off.

Method used

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  • Granular material and preparation method thereof
  • Granular material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0115] The present invention also provides a method for preparing the pellets, the method comprising the steps of:

[0116] 1) provide the carcass, wherein,

[0117] The carcass is prepared as follows: mix and disperse the carcass powder and the carcass forming agent evenly, and optionally press and embed the superhard core material into the center of the homogeneous mixture formed by the carcass powder and the carcass forming agent , forming the carcass;

[0118] Typically, the carcass powder includes (but not limited to): tungsten carbide powder, nickel powder, cobalt powder, manganese powder, copper-tin alloy powder, iron powder, copper powder, zinc powder, silver powder, tungsten powder, Molybdenum powder, silicon carbide powder, silicon nitride powder, alumina, boron powder, ceramic powder, or a combination thereof;

[0119] Typically, the carcass forming agent includes (but not limited to): rubber, silicone rubber, or a combination thereof;

[0120] Representatively, ...

Embodiment 1

[0168] Example 1 Pellet 1

[0169] The tungsten carbide powder, nickel powder, cobalt powder, manganese powder, and copper-tin-10 powder are uniformly mixed in the weight ratio of 50:12:16:8:32. The mixed powder and methyl vinyl silicone rubber were uniformly mixed on an open mill to form a carcass material in which the mixed powder accounted for 93wt%, the rotating speed was 35r / min, and the time was 15min. Take 0.0474g of carcass material, press and embed diamonds with a single particle diameter of 450 μm and a boron-coated layer into the carcass material to form a carcass. The carcass was shaped, and then placed in a vacuum high-temperature furnace for sintering at a sintering temperature of 780° C. and a holding time of 60 minutes to obtain pellets 1 .

[0170] result

[0171] The particle size, bonding performance, etc. of the obtained pellets were measured.

[0172] figure 1 is a photograph of pellet 1 prepared in Example 1. From figure 1 It can be obtained that th...

Embodiment 2

[0174] Example 2 pellet 2

[0175] The tungsten carbide powder, nickel powder, cobalt powder, manganese powder, and copper tin-15 powder are uniformly mixed in the weight ratio of 55:13:18:9:36. The mixed powder and methyl vinyl silicone rubber were evenly mixed on an open mill to form a carcass material in which the mixed powder accounted for 85 wt%, with a rotating speed of 30 r / min and a time of 10 min. Take 0.0116g of carcass material, press and embed diamonds with a single particle diameter of 400 μm and a chrome-plated layer on the surface of the carcass material to form a carcass. The carcass was shaped, and then placed in a vacuum high-temperature furnace for sintering at a sintering temperature of 750° C. and a holding time of 40 minutes to obtain pellets 2 .

[0176] result

[0177] The particle size of the obtained granules is 0.9mm, and the powder does not fall off after being ultrasonicated in water for 10 minutes.

[0178] Example 3 Pellet 3

[0179]The tungs...

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Abstract

The present invention relates to a tire body. The tire body specifically contains a tire body powder material, a tire body molding agent, and optionally a superhard inner core material positioned at the center of a uniform mixture formed by the tire body power material and the tire body molding agent. The invention further discloses a method for preparing a granular material by sintering the tire body material, and applications of the granular material, wherein the preparation method has advantages of low cost, environmental protection, simple equipment and high efficiency. The granular material prepared by the preparation method can be uniformly distributed in the metal and the alloy. In addition, the inner core material is well combined with the tire layer and the tire layer powder material.

Description

technical field [0001] The invention relates to the field of superhard materials, in particular to a carcass, pellets prepared by sintering using the carcass, and applications thereof. Background technique [0002] On cutting and grinding tools made of metal, such as diamond saw blades, cutter heads and drill bits, superhard materials (such as diamond particles) are often used as cutting and grinding components. Due to the high interfacial energy between diamond and many metals and alloys, the dispersion of diamond in many metals and alloys is poor, and there are diamond aggregation and vacancies in local areas, which affect the performance of diamond. [0003] Therefore, in order to ensure the uniform distribution of diamonds, it is necessary to select suitable materials to cover the diamonds, so that during the sintering process, the wrapped material between the diamond particles can be effectively spaced, thereby improving the performance of diamond products. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C32/00
Inventor 宋英泽江南褚伍波林正得白华虞锦洪吕继磊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI