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

Ceramet containing Ni-Cr binder and preparation thereof

A cermet and binder technology, applied in the field of cermet materials, can solve the problems of short service life, unstable structure and properties, unsatisfactory high temperature oxidation resistance, etc., and achieve the effect of low friction coefficient and good rigidity

Inactive Publication Date: 2009-05-20
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ti(C,N)-based cermets containing Ni, Co or Ni-Co binders have unsatisfactory high-temperature oxidation resistance and unstable microstructure, so the tools made of them have a long service life when performing high-speed and efficient cutting. Short (cutting temperature up to 1000°C), the hot extrusion die made

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
  • Ceramet containing Ni-Cr binder and preparation thereof
  • Ceramet containing Ni-Cr binder and preparation thereof
  • Ceramet containing Ni-Cr binder and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] As shown in Table 2, for the cermets containing Ni binder of the five formulations of A1, A2, A3, A4 and A5 for comparison, TiC, TiN, WC, Mo, Cr in Table 1 were selected. 3 C 2 , Ni and graphite powder as raw material; B1, B2, B3, B4 and B5 of the present invention five kinds of formulas contain the cermet of Ni-Cr binder altogether, select TiC, TiN, WC, Mo, Cr in the table 1 for use 3 C 2 , Ni, Cr and graphite powder as raw materials. The specific preparation process of these ten kinds of cermets is as follows: first, the ingredients are mixed according to the ingredients shown in Table 2, and then ball milling is carried out according to the ball milling mixing process shown in Table 3 to obtain a mixed powder with uniform composition, and then an appropriate amount of polymer is added. Vinyl alcohol was molded according to the molding process shown in Table 3, and finally vacuum degreasing and vacuum sintering were carried out according to the vacuum degreasing and...

Embodiment 2

[0032] As shown in Table 5, C1, C2, C3, C4, C5, C6, C7, C8, C9 and C10 of the present invention have ten kinds of cermets containing Ni-Cr binder, and the TiC in Table 1 is selected. , TiN, WC, Mo, Cr 3 C 2, Ni, Cr, graphite, NbC, TaC and Al powders as raw materials. The specific preparation process of these ten kinds of cermets is as follows: first, batching is carried out according to the ingredients shown in Table 5, and then ball milling is carried out according to the ball milling mixing process shown in Table 6 to obtain a mixed powder with uniform composition, and then an appropriate amount of Polyvinyl alcohol was molded according to the molding process shown in Table 6, and finally vacuum degreasing and vacuum sintering were carried out according to the vacuum degreasing and vacuum sintering processes in Table 6 to obtain a dense sintered body, and the vacuum during vacuum degreasing and vacuum sintering degrees are less than 5Pa and 1×10 -1 Pa. The room-temperatu...

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

No PUM Login to View More

Abstract

The invention relates to cermet containing a Ni-Cr binding agent, belonging to cermet material and aiming at leading the high temperature oxidation resistance of the cermet to be improved. The cermet is made by that TiC, TiN, WC, Mo, Cr3C2, Ni, Cr and powdered graphite are conducted with ball milling mixing, press molding, vacuum degreasing and vacuum sintering; the weight percentage of the compositions are as follows: Ti is more than or equal to 33 and less than or equal to 49, W is more than or equal to 4 and less than or equal to 9, Mo is more than or equal to 11 and less than or equal to 17, Ni is more than or equal to 12 and less than or equal to 34, Cr is more than or equal to 4 and less than or equal to 10.5, C is more than or equal to 7.5 and less than or equal to 11, and N is more than or equal to 2 and less than or equal to 3. The method of the invention comprises the following steps of ball milling mixing, press molding, vacuum degreasing and vacuum sintering. The cermet has good rigidity, red hardness, wear resistance, oxidation resistance, thermal shock resistance and adhesive resistance in hot environment as well as low friction coefficient, and can be used for manufacturing high-speed high-efficiency cutting tools, copper profile hot extrusion dies and parts with heat resistance, corrosion resistance and wear resistance.

Description

technical field [0001] The invention belongs to cermet materials, in particular to a cermet containing Ni-Cr binder and a preparation method thereof. Background technique [0002] Ti(C,N)-based cermet is a new particle-reinforced composite gold material that appeared in the 1970s. Compared with WC-based cemented carbide, it has better high-temperature red hardness, wear resistance, rigidity and anti-adhesion Good quality, low density and rich main raw materials, it is an ideal engineering material for making knives, wire drawing dies, hot extrusion dies, high-temperature parts at the hot end of engines and high-temperature wear-resistant parts in the petrochemical industry. However, the strength and toughness of Ti(C,N)-based cermets are very sensitive to their chemical composition and microstructure, and it is often difficult to have high hardness and high strength and toughness at the same time, which restricts their popularization and application in the fields of tools an...

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
IPC IPC(8): C22C29/04C22C1/05
Inventor 熊惟皓杨青青瞿峻孙文礼李俊姚振华
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com