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Preparation method of high-entropy steel bond hard alloy with core-edge structure

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

Active Publication Date: 2022-05-13
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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  • Preparation method of high-entropy steel bond hard alloy with core-edge structure
  • Preparation method of high-entropy steel bond hard alloy with core-edge structure
  • Preparation method of high-entropy steel bond hard alloy with core-edge structure

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Embodiment 1

[0035] A method for preparing a high-entropy steel-bonded hard alloy with a core-edge structure, comprising the steps of:

[0036] S1: Preparation of high-entropy alloy powder of a single solid solution. Specifically, metal blocks of cobalt, chromium, iron, nickel, and manganese are weighed according to the equiatomic ratio or close to the equiatomic ratio, and then put into an induction furnace for smelting. The number of smelting times is set to 5-6 times, the smelted alloy liquid is injected into the atomizing nozzle, and the alloy liquid is atomized into small droplets under the high-speed airflow, and finally forms alloy powder 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, the microscopic picture of the alloy powder after atomization is shown in figure 1 , XRD diffraction analysis results see figure 2 . Among them, Cr, Ni, and Mn elements provide high hardness and high...

Embodiment 2-5

[0051] The high-entropy cemented carbide of embodiment 2-5 is prepared by the preparation method of embodiment 1 adjustment composition distribution ratio, and its performance is tested by the test method of embodiment 1, and test result is shown in Table 2:

[0052] The performance test result of table 2 embodiment 2-5 corresponding product

[0053]

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

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Abstract

The invention relates to a preparation method of a high-entropy steel bond hard alloy with a core-edge structure, and the preparation method of the high-entropy steel bond hard alloy with the core-edge structure comprises the following steps: S1, preparing high-entropy alloy powder of a single solid solution; s2, 50-60% by weight of titanium carbide powder, 10-20% by weight of tungsten carbide powder, 15-20% by weight of iron powder and 10-15% by weight of high-entropy alloy powder are mixed and subjected to ball milling treatment, then drying and sieving are conducted, mixed powder is obtained, paraffin is adopted as a ball milling forming agent, and absolute ethyl alcohol is adopted as a ball milling medium; and S3, the mixed powder is subjected to compression molding and sintering treatment, the high-entropy steel bond hard alloy with the core-edge structure is obtained through a special sintering process, and the high-entropy steel bond hard alloy is low in cost and good in environmental protection property and can still have extremely high hardness and good strength and toughness under the condition that the hard phase content is small.

Description

technical field [0001] The invention relates to the field of hard alloys, in particular to a method for preparing high-entropy steel-bonded hard alloys with a core-edge structure. Background technique [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. And other problems such as poor effect in harsh environments. Now it is urgent to develop new cemented carbide to solve the current situation. [0003] The high-entropy alloy is composed of five 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 value, which can promote the formation of solid solution and inhibit the formation of intermetallic compou...

Claims

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Application Information

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Patent Type & Authority Applications(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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