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A kind of preparation method of filled type layered structure cemented carbide

A technology of cemented carbide and layered structure, which is applied in the field of preparation of filled layered structure cemented carbide, can solve problems such as poor wear resistance and poor toughness, achieve improved comprehensive performance, great social and economic benefits, and overcome Contradictory effects of toughness and wear resistance

Active Publication Date: 2016-05-25
JINGZHOU JINGTIAN MINGJIAN CEMENTED CARBIDE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This single-layer organizational structure leads to its contradictory performance, that is, good toughness has poor wear resistance, and good wear resistance has poor toughness.

Method used

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  • A kind of preparation method of filled type layered structure cemented carbide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, weigh the coarse-grained pellets with a particle size of 2.5-6.0 μm and the fine-grained pellets with a grain size below 1 μm according to the weight percentage of 35%: 65%, and then according to the ratio between the coarse-grained pellets and the fine-grained pellets Weight ratio relationship, determine the volume size and unit weight of the fine-grained granular material, and then press the fine-grained granular material into an angle of 55° o bullet-shaped semi-finished products. Press the fine-grained material into an angle of 55 o The purpose of the bullet-shaped semi-finished product is to ensure that the contact surface between the fine-grained pellets and the coarse-grained pellets must form a "V"-shaped interface, so as to ensure the joint quality of the subsequent coarse-grained pellets and fine-grained pellets. The pressure in the process of pressing the semi-finished product of the fine grain material is 600 kg / cm2. According to the total unit weig...

Embodiment 2

[0025] Firstly, weigh the low-cobalt material with a cobalt content of 6%-8% and the high-cobalt material with a cobalt content of 11%-20% according to the weight percentage of 30%:70%, and then according to the balance between the low-cobalt material and the high-cobalt material Weight ratio relationship, determine the volume and unit weight of the high-cobalt material, and then press the high-cobalt material into an angle of 60 o bullet-shaped semi-finished products. Press the high cobalt material into an angle of 60 o The purpose of the bullet-shaped semi-finished product is to ensure that the contact surface between the high-cobalt material and the low-cobalt material must form a "V"-shaped interface, so as to ensure the joint quality of the subsequent mutual pressing of the low-cobalt material and the high-cobalt material. The pressure during the pressing process of high-cobalt semi-finished products is 600 kg / cm2. According to the total unit weight of the product, put ...

Embodiment 3

[0027] First, weigh the primary tungsten carbide prepared by primary tungsten powder and the regenerated tungsten carbide after reduction processing of waste alloy according to the weight percentage of 40%: 60%, and then according to the weight ratio relationship between primary tungsten carbide and regenerated tungsten carbide, Determine the volume and single weight of the regenerated tungsten carbide, and then press the regenerated tungsten carbide into an angle of 65 o bullet-shaped semi-finished products. Press regenerated tungsten carbide into an included angle of 65 o The purpose of the bullet-shaped semi-finished product is to ensure that the contact surface between the regenerated tungsten carbide and the primary tungsten carbide must form a "V"-shaped interface, so as to ensure the joint quality of subsequent regenerated tungsten carbide and primary tungsten carbide. The pressure in the pressing process of recycled tungsten carbide semi-finished products is 600 kg / cm...

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Abstract

The invention relates to a method for preparing a filled stratified-structure hard alloy and belongs to the technical field of metal powder molding preparation. According to the method, the filled stratified-structure hard alloy is prepared from 30-40% of main material and 60-70% of filling material through pressing. By adopting the method disclosed by the invention, coarse grains can be organically combined with fine grains, so that the grain structure of a subsequent product can be changed; high cobalt can be organically combined with low cobalt, and primary tungsten carbide can be organically combined with regenerated tungsten carbide, so that the cobalt layer structure of the subsequent product can be changed, and the contradiction between toughness and abrasion resistance of the hard alloy is radically overcome. Moreover, the use range of a regenerated tungsten resource is expanded, and great social and economic benefits are created.

Description

technical field [0001] The invention relates to a preparation method of a filled layered structure cemented carbide, which belongs to the technical field of metal powder molding preparation. Background technique [0002] Filled layered structure cemented carbide is mainly aimed at traditional single-layer uniform structure alloys. Single-layer uniform cemented carbide, its composition is composed of hard phase (WC, WC-Tic, etc.) and binder phase (such as CO, CO+Ni, etc.). interact to form a continuous transitional whole. This single-layer organizational structure leads to contradictory properties, that is, good toughness has poor wear resistance, and good wear resistance has poor toughness. Therefore, it is necessary to develop a kind of high toughness of high-cobalt cemented carbide and high wear resistance of low-cobalt cemented carbide, as well as high toughness of ultra-coarse cemented carbide and fine-grained cemented carbide. Abrasive carbide. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/08B22F7/06
Inventor 刘波郭红桥皮红松肖德宏周芳娅
Owner JINGZHOU JINGTIAN MINGJIAN CEMENTED CARBIDE PROD
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