Unlock instant, AI-driven research and patent intelligence for your innovation.

Making process for the preparation of cemented carbide material

A cemented carbide and process technology, applied in the process field of cemented carbide materials, can solve the problems of insufficient hardness and strength, achieve high hardness and strength, and improve the effect of mechanical activity

Inactive Publication Date: 2017-01-04
柳州增程材料科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of WC-Co alloy can adopt lamination method, sintering and other processes. The WC grains of WC-Co cemented carbide prepared by these processes are continuously distributed, and the alloy with Co phase gradient has a fine grain side with Higher hardness, the coarse-grain side has a certain bending strength; during sintering, the Co phase migrates from the coarse-grain side to the fine-grain side, and its hardness and strength are not enough

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Wash 95wt% WC grains and 5wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders; then mix the above powders in a mixer evenly and grind them to obtain alloy powder; the alloy powder is placed in an extrusion die, and then extruded by an extruder with a pressure of 1000MPa to obtain a cemented carbide material, followed by sintering at a temperature of 280°C for 30s, then sintering at a temperature of 500°C for 60s, and then Sintering at 650°C for 30s; followed by solution treatment at 650°C for 12 minutes; followed by cold deformation treatment with a cold deformation of 30%; and finally aging treatment at 300°C for 3 hours to obtain WC-Co cemented carbide materials. The measured hardness of the material is 51.2HRC, and the shear strength is 621.1MPa.

Embodiment 2

[0026] Wash 92wt% WC grains and 8wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders respectively; then mix the above powders in a mixer and grind them to obtain alloy powder; the alloy powder is placed in an extrusion die, and then extruded by an extruder with a pressure of 1100MPa to obtain a cemented carbide material, followed by sintering at a temperature of 300°C for 25s, and then sintering at a temperature of 560°C for 50s, and then Sintering at 680°C for 25s; followed by solution treatment at 680°C for 11 minutes; followed by cold deformation treatment with a cold deformation of 32%; and finally aging treatment at 330°C for 2.5 hours to obtain WC-Co cemented carbide materials. The measured hardness of the material is 68.1HRC, and the shear strength is 673.2MPa.

Embodiment 3

[0028] Wash 90wt% WC grains and 10wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders; then mix the above powders in a mixer and grind them to obtain alloy powder; the alloy powder is placed in an extrusion die, and then extruded by an extruder with a pressure of 1200MPa to obtain a cemented carbide material, followed by sintering at a temperature of 320°C for 20s, and then at a temperature of 600°C for 40s, and then sintering at a temperature of 600°C for 40s, and then Sintering at 700°C for 20s; followed by solution treatment at 700°C for 10 minutes; followed by cold deformation treatment with a cold deformation of 35%; and finally aging treatment at 350°C for 2 hours to obtain WC-Co cemented carbide materials. The measured hardness of the material is 64.0HRC, and the shear strength is 615.1MPa.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
shear strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a making process for the preparation of cemented carbide material. it includes cleaning the WC particles and Co particles separately, removing surface inclusions; crushing the cleaned WC particles and Co particles respectively into powder; then mixing the aforementioned powder in a blender, and grinding after mixing uniformly to obtain alloy powder; putting aforementioned alloy powder into an extrusion die, then being extruded into certain shape with an extruder and get cemented carbide material; then heat treating aforementioned cemented carbide material. The invention utilizes the cleaning process to remove the inclusions on the surface of metal powder, improving the alloy purity in the follow-up processes. And then through mixing and grinding to improve the mechanical activity of the powder, to provide a better basis for the tight bonding of alloy. Then heat pressing and sintering and heat treating of WC-Co alloy powder to obtain cemented carbide material with higher hardness and strength.

Description

technical field [0001] The present invention relates to a process for cemented carbide materials. Background technique [0002] The amount of cemented carbide used in mining, coal and oil drilling is very large. Due to technical limitations, these cemented carbide tools for rock drilling have changed little over the years, and these changes are nothing more than controlling the purity of the alloy and the composition of the binder phase. Wait. At present, cemented carbide tools for mining mainly use WC-Co alloy. In general, the alloy composition of percussion drill bits for drilling, coal mining and asphalt cutting is WC and 6-11% Co, and the alloys for different purposes, because some properties are improved, other properties are reduced. For example, high wear-resistant alloys usually have poor toughness, on the contrary, alloys with good toughness have poor wear resistance. Reducing the Co content and increasing the hardness can reduce the wear of the alloy, while incr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10C22F1/16B22F9/04B22F3/02B22F3/10B22F3/24
CPCC22C29/08B22F3/02B22F3/1017B22F3/24B22F9/04B22F2003/248C22C1/051C22C29/067C22F1/16
Inventor 李祥明田源李贤良
Owner 柳州增程材料科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com