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A kind of preparation method of high-entropy steel-bonded cemented carbide with core-edge structure

A technology of steel-bonded hard alloy and edge structure, applied in the field of hard alloy, can solve the problems of difficult supply of raw materials, poor effect, high cost, etc., and achieve the effect of high hardness, high quality, and no deformation of shape

Active Publication Date: 2022-06-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the WC-Co series of cemented carbides are developing rapidly due to their excellent performance. However, the current field of cemented carbide preparations is facing difficulties in supplying raw materials, high costs, high toxicity of materials (WC, Co) and high temperature, strong acid and alkali conditions. Problems such as poor effect in harsh environments

Method used

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  • A kind of preparation method of high-entropy steel-bonded cemented carbide with core-edge structure
  • A kind of preparation method of high-entropy steel-bonded cemented carbide with core-edge structure
  • A kind of preparation method of high-entropy steel-bonded cemented carbide with core-edge structure

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Embodiment 1

[0035] A preparation method of a high-entropy steel-bonded cemented carbide with a core-edge structure, comprising the following steps:

[0036] S1: Prepare high-entropy alloy powder of a single solid solution. Specifically, metal blocks of cobalt, chromium, iron, nickel, and manganese are weighed according to equiatomic ratio or near equiatomic ratio, and then put into an induction furnace for smelting, and the number of smelting is set to 5-6 times, the melted alloy liquid is injected into the atomizing nozzle, the alloy liquid is atomized into small droplets under the high-speed airflow, and finally the alloy powder is formed in the atomizing cylinder. The purity of the high-entropy alloy powder is ≥99.5%, and the oxygen content ≤0.12%, the average particle size is 25μm, see the micrograph of the alloy powder after atomization figure 1 , the results of XRD diffraction analysis can be found in figure 2 . Among them, Cr, Ni, Mn elements provide high hardness and high oxida...

Embodiment 2-5

[0051] The high-entropy cemented carbides of Examples 2-5 were prepared by adjusting the composition ratio by the preparation method of Example 1, and their properties were tested by the test method of Example 1. The test results are shown in Table 2:

[0052] Table 2 The performance test results of the corresponding products of embodiment 2-5

[0053]

[0054] It can be seen from the test results that the HSC cemented carbides obtained by the sintering process of the present application within a certain ratio range of the present application have greater advantages compared with standard cemented carbides in terms of density and hardness.

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Abstract

The invention relates to a method for preparing a high-entropy steel-bonded hard alloy with a core-edge structure. The method for preparing a high-entropy steel-bonded hard alloy with a core-edge structure comprises the following steps: S1: preparing high-entropy alloy powder of a single solid solution ; S2: According to the percentage by weight, 50-60% of titanium carbide powder, 10-20% of tungsten carbide powder, 15-20% of iron powder, and 10-15% of high-entropy alloy powder are mixed and ball-milled, and then The mixed powder is obtained by drying and sieving, wherein the ball milling agent is paraffin, and the ball milling medium is absolute ethanol; S3: The mixed powder is pressed into shape and then sintered, and a high-entropy steel-bonded hard alloy with a core-edge structure is obtained through a special sintering process , which is low in cost, good in environmental protection, and can still have extremely high hardness, good strength and toughness under the condition of less hard phase content.

Description

technical field [0001] The invention relates to the field of cemented carbide, in particular to a preparation method of a high-entropy steel-bonded cemented carbide with a core-edge structure. Background technique [0002] At present, the WC-Co series of cemented carbides have developed rapidly due to their excellent properties. However, the current field of cemented carbide preparation is faced with difficulties in supplying raw materials, high cost, high toxicity of materials (WC, Co), and high temperature, strong acid and alkali. and other problems such as poor performance in harsh environments. There is an urgent need to develop new cemented carbides to solve the current situation. [0003] High-entropy alloys are composed of 5 or more elements in equimolar or nearly equimolar ratios, and the concentration of each element is between 5-35%. The system has a high mixing entropy, which can promote the formation of solid solutions and inhibit the formation of intermetallic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/10C22C1/05C22C30/00B22F9/08B22F3/10
CPCC22C29/10C22C29/067C22C1/051C22C30/00B22F9/082B22F3/1021
Inventor 杜劲王志鹏马晓腾梁釜张重彦孔祥民
Owner QILU UNIV OF TECH
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