Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cemented carbide product and preparing method thereof

A technology of cemented carbide and products, which is applied in the field of net forming of super-large cemented carbide products, which can solve the problems of affecting product performance, poor product density, uneven blank density, etc., to achieve small blank processing volume, reduce equipment investment, The effect of increasing productivity

Active Publication Date: 2018-07-13
ZHUZHOU TONGDA CARBIDE LTD CO
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to prepare super-large-sized hard alloy products has the following problems: uneven blank density and poor product density, which will directly affect product performance; high mold costs, large equipment investment, and complicated procedures

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cemented carbide product and preparing method thereof
  • Cemented carbide product and preparing method thereof
  • Cemented carbide product and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a kind of preparation method of cemented carbide product, comprises the following steps:

[0023] Mix tungsten carbide powder, cobalt powder and antioxidant and then ball mill to obtain slurry;

[0024] The slurry is spray-dried to obtain a mixed powder;

[0025] The mixed powder is hot-pressed and sintered to obtain a cemented carbide product.

[0026] In the invention, the tungsten carbide powder, the cobalt powder and the antioxidant are mixed and ball milled to obtain the slurry. In the present invention, the mass percentage of the tungsten carbide powder and the cobalt powder is preferably 92:8, and the mass ratio of the antioxidant to the tungsten carbide powder is preferably (4-6):100, more preferably 5:100. In the present invention, the Fischer particle size of the tungsten carbide powder is preferably 6-8 μm; the Fischer particle size of the cobalt powder is preferably 4-6 μm.

[0027] In the present invention, the antioxidant is prefe...

Embodiment 1

[0035] Select 94Kg of tungsten carbide powder with a Fisher's particle size of 8 μm, 6 kg of cobalt powder with a Fisher's particle size of 6 μm, and add 4.7 kg of compound alcohol antioxidants. The compound antioxidant is composed of 4.23 kg of ethanol, 0.282 kg of polysorbate, and 0.188 kg of n-butanol . The mixture was placed on a tilting wet mill with 20.94 kg of distilled water as a medium for ball milling, and the slurry was discharged from the ball mill after 36 hours of ball milling.

[0036] Put 125.64kg of the slurry into a stainless steel container, and pump it into an open spray drying tower to make powder. The spray atomization pressure is controlled at 1.1MPa, and the temperature of the inlet of the spray drying tower is controlled at 180°C. The temperature is controlled at 100°C, and the average particle size of the mixed powder obtained after milling is 2.1 μm.

[0037] The mixed powder obtained above is carried out hot press sintering, the condition of descri...

Embodiment 2

[0040] 188kg of tungsten carbide powder with a Fisher's particle size of 6 μm, 12 kg of cobalt powder with a Fisher's particle size of 4 μm, and 9.4 kg of compound alcohol antioxidants. composition. The mixture was placed on a tilting wet mill with 52.35 kg of distilled water as a medium for ball milling, and the slurry was discharged from the ball mill after 32 hours of ball milling.

[0041]Put 261.75kg of the above slurry into a stainless steel container, pump it into an open spray drying tower to make powder, control the spray atomization pressure at 0.8MPa, control the temperature at the inlet of the spray drying tower at 200°C, Controlled at 120°C, the average particle size of the mixture obtained after milling is 1.8 μm.

[0042] The mixture prepared above was subjected to hot-press sintering. The conditions of hot-press sintering were as follows: after heating up from room temperature to 800 °C at a heating rate of 10 °C / min, at 800 °C and 4 MPa, heat preservation and...

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
particle sizeaaaaaaaaaa
wear resistanceaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a cemented carbide product. The method comprises the following steps that tungsten carbide powder, cobalt powder and an antioxidant are mixed and are subject to ball milling to obtain slurry; the slurry is subjected to spray drying to obtain mixed powder; and the mixed powder is subjected to the hot-pressing sintering to prepare the cemented carbide product. According to the method for preparing the cemented carbide product, a method of hot-pressing is used to produce a supersize cemented carbide shaft sleeve, so that the process link is reduced, the equipment input is reduced, and the compactness of the product and the utilization rate of raw materials are improved; the compound alcohol antioxidant is used, so that the spray pulverizing operation process is optimized, the output rate of the mixed powder is improved, and the defect in traditional process production is solved.

Description

technical field [0001] The invention relates to the technical field of net shaping of hard alloy ultra-large products, in particular to a hard alloy product and a preparation method thereof. Background technique [0002] At present, the production of cemented carbide products is to directly add the powder of the product formula into the mold, and then press it on the press, and then put the obtained blank into the sintering furnace for sintering and molding, and the formed blank may be ground again. Or cut into finished products in different shapes. The following problems exist in the preparation of ultra-large-sized hard alloy products by this method: non-uniform blank density and poor product compactness, which will directly affect product performance; high mold costs, large investment in equipment, and complicated procedures. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing super large hard alloy products with...

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): C22C1/05C22C29/08B22F3/14B22F1/00
CPCC22C1/051C22C29/005C22C29/08B22F3/14B22F1/102
Inventor 刘丹
Owner ZHUZHOU TONGDA CARBIDE LTD CO
Features
  • Generate Ideas
  • 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