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Low-cobalt hard alloy material and manufacturing method thereof

A cemented carbide and alloy technology, applied in the field of cemented carbide, can solve the problems of limited reserves in the world, achieve the effect of perfect alloy crystallization, reduce the dependence of Co, and reduce production costs

Inactive Publication Date: 2019-07-05
GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But cobalt is an expensive and rare metal with extremely limited world reserves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A cemented carbide material: including 80 parts of hard phase, 14 parts of iron, 4 parts of nickel and 2 parts of cobalt. The hard phase consists of WC, and the binder phase consists of Fe, Ni and Co. After pretreatment, pre-sintering and re-sintering, the obtained cemented carbide material has a density of 92.6%, a hardness of 84.73HRA, and a bending strength of 1936MPa.

Embodiment 2

[0016] A cemented carbide material: including 80 parts of hard phase, 12 parts of iron, 3 parts of nickel and 5 parts of cobalt. The hard phase consists of WC, and the binder phase consists of Fe, Ni and Co. After pretreatment, pre-sintering and re-sintering processes, the obtained cemented carbide material has a density of 93.5%, a hardness of 88.1HRA, and a bending strength of 2011MPa.

Embodiment 3

[0018] A hard alloy material: including 80 parts of hard phase, 4 parts of iron, 1 part of nickel and 15 parts of cobalt. The hard phase consists of WC, and the binder phase consists of Fe, Ni and Co. After pretreatment, pre-sintering and re-sintering processes, the obtained cemented carbide material has a density of 93.4%, a hardness of 86.9HRA, and a bending strength of 2109MPa.

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Abstract

The invention discloses a low-cobalt hard alloy material and a manufacturing method of the low-cobalt hard alloy material. The manufacturing method specifically comprises the steps that 80 parts of WCpowder, 4-16 parts of carbonyl iron powder, 1-5 parts of carbonyl nickel powder and 2-15 parts of reduced cobalt powder serve as raw materials, the raw materials are preprocessed, presintered, sintered again and subjected to heat treatment after sintering is accomplished, and then low-cobalt hard alloy is obtained, wherein the particle size of the WC powder is 400. The comprehensive performance of the obtained low-cobalt hard alloy is same to the comprehensive performance of conventional WC-20%Co hard alloy, and the hardness and the compactness of the low-cobalt hard alloy are higher than those of the WC-20%Co hard alloy.

Description

technical field [0001] The invention relates to the technical field of cemented carbide, in particular to a cemented carbide material. Background technique [0002] Cemented carbide has a unique combination of properties, namely high compressive strength, good wear resistance, high hardness, high elastic modulus, strong impact resistance, good vibration resistance, good corrosion resistance and good dimensional stability, etc., especially in High hardness and strength can still be maintained at high temperature. It has become an indispensable structural material and tooling material in almost all new technology fields and industrial sectors, and is widely used in national defense, metal cutting, non-metal cutting operations (such as ore, oil, natural gas drilling), transportation Industry, construction, metal forming and other fields, known as "the teeth of industry". Since the 1920s, cobalt has been the main binder of cemented carbide. This is because cobalt has good wet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C1/051C22C29/005C22C29/067C22C29/08
Inventor 王敏唐鹏
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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