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Hard alloy sintered by high-entropy alloy binder and compound carbide and preparation method thereof

A composite carbide and high-entropy alloy technology, which is applied in the field of cemented carbide and its production, can solve the problems of failing to change the limitations of a single main element, and achieve the effects of high hardness, good toughness, and excellent temperature resistance

Inactive Publication Date: 2006-09-06
SHAOGUAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these added ingredients are extremely small, and cannot change the limitations of a single main element

Method used

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  • Hard alloy sintered by high-entropy alloy binder and compound carbide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take six metal elements such as aluminum, cobalt, chromium, copper, iron and nickel, the molar ratio of which is: 0.5:1:1:1:1:1, and the total weight is about 40 grams. Take 108 grams of titanium carbide and 12 grams of tungsten carbide. Mix metal element powder and two carbide powders in a ball mill, then put the ball mill into a ball mill for 12 hours of high-energy ball milling. Then add 1.5wt% paraffin wax as wetting agent and binder to the ball mill cylinder, and then carry out low-energy ball milling for 6 hours. After unloading and drying, it is pressed into a round embryo of φ12mm×5mm. The last is degreasing and sintering. The deesterification is carried out in a vacuum furnace at 400° C. under a mixed atmosphere of argon and hydrogen. After deesterification treatment, it can be sintered at 1400°C under vacuum. and measure its performance.

Embodiment 2 to 7

[0015] The manufacturing steps of Example 1 were repeated, but the constituent elements of the binder phase and the composition of the composite carbide were changed to the compositions shown in Table 1 for cemented carbide numbers 2 to 7.

[0016] example

[0017] The hardness values ​​of all test pieces of cemented carbide samples No. 1 to 7 were measured by Vickers hardness meter. The load applied during the measurement is 5kgf, and the loading time is 10 seconds. Each test piece measures the hardness values ​​at seven different positions, and takes the average value of the middle five as the hardness of the test piece. The results are shown in Table II.

[0018] Fracture toughness (K IC ) is calculated from the crack length (I) measured by Vickers hardness. Calculated as follows:

[0019] K IC = 0.15 ( HV ΣI ) ...

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Abstract

The invention relates the high entropy alloy binding agent and hard alloy sintered by multicarbide and preparing method, comprising the following steps: clinkering polyhydric high entropy alloy powder binding phase and multicarbide, the binding phase comprising 5-10 kinds metallic elements, every kind of whose content is between 5%-30%; the multicarbide hand base comprises 2-4 super hand carbides, every kind of whose content is between 5%-90%. The invention has the advantages of high hand, high tenacity and high fire-resisting property.

Description

【Technical field】 [0001] The invention relates to a cemented carbide and a manufacturing method thereof, in particular to a high-entropy alloy binder and composite carbide prepared by taking composite carbide as the hard phase and multi-element high-entropy alloy as the bonding phase. Material sintered hard alloy and its preparation method. 【Background technique】 [0002] Cemented carbide is a very successful composite material. It combines the high strength of ceramic materials and the toughness of metal materials to become a material with high hardness and appropriate toughness. In addition, its wear resistance and temperature resistance are also very good. It is widely used in the industry, and its main applications include cutting, molding dies, wear-resistant components, high-temperature tools, etc. [0003] At present, carbide-based superhard alloys are the main ones, among which WC-based and TiC-based cemented carbides account for the majority. The binder of WC ceme...

Claims

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Application Information

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IPC IPC(8): C22C29/02C22C1/05B22F9/04B22F3/10
Inventor 黄元盛
Owner SHAOGUAN COLLEGE
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