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

A kind of novel cemented carbide grain growth inhibitor and preparation method thereof

A technology of cemented carbide and grain growth, which is applied in nanotechnology and other directions, can solve the problems of uneven mixing of inhibitors and cemented carbide materials, and achieve the effects of low preparation cost, high-performance preparation, and improved inhibition effect

Active Publication Date: 2018-11-20
重庆强锐科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a novel cemented carbide grain growth inhibitor and a preparation method thereof. The inhibitor can solve the problem of inhomogeneous mixing of the inhibitor and cemented carbide material, and significantly improve the effect on cemented carbide grain growth. Inhibition effect, so as to realize the high-performance preparation of nano-WC cemented carbide

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

[0018] Embodiment 1 nanometer (V, Cr) (C, N) grain inhibitor grain growth inhibitor

[0019] It includes: firstly, ammonium metavanadate, ammonium chromate and nano-carbon black are respectively used as V source, Cr source and C source (weight ratio 5:13:60), and the precursor product is prepared by aqueous solution spray granulation. at 1100°C, N 2 In a closed system with a pressure of 0.03MPa, keep warm for 60min, carbothermally reduce and nitride the precursor product, and synthesize a single nanocrystal (V 0.35 ,Cr 0.65 ,) 3 (C,N) Solid solution powder.

Embodiment 2

[0021] Take WC powder, Co powder and nanometer (V 0.35 ,Cr 0.65 ,) 3 (C,N)) Grain inhibitors were mixed into initial materials, and ball milled for 72 hours in an ethanol environment at a speed of 50 rpm and a ball-to-material weight ratio (BPR) of 10:1, and fully ground into a total mixture. The blend was dried, sieved, and cold compacted under a unidirectional load of 150 MPa. Vacuum sintering is carried out on the compact, and isothermally sintered at 1763K for 1 hour, during which the pressure is gradually increased, and the argon pressure is 2 MPa during the holding time in the later stage of sintering, and WC cemented carbide is obtained.

Embodiment 3

[0023] Take WC powder, Co powder and nanometer (V 0.35 ,Cr 0.65 ,) 3 (C,N)) Grain inhibitors were mixed into initial materials, and ball milled for 72 hours in an ethanol environment at a speed of 50 rpm and a ball-to-material weight ratio (BPR) of 10:1, and fully ground into a total mixture. The blend was dried, sieved, and cold compacted under a unidirectional load of 150 MPa. Vacuum sintering is carried out on the compact, and isothermally sintered at 1763K for 1 hour, during which the pressure is gradually increased, and the argon pressure is 2 MPa during the holding time in the later stage of sintering, and WC cemented carbide is obtained.

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 a nano-modified hard alloy long crystal inhibitor and a preparation method thereof. The chemical formula of the inhibitor is (V0.35, Cr0.65,) 3 (C, N). By means of the long crystal inhibitor, mixed nonuniformity of the inhibitor and a hard alloy material can be relieved so as to significantly improve the hard alloy grain growth inhabitation effect, and thus high performance of a nano WC hard alloy can be achieved.

Description

technical field [0001] The invention belongs to the field of cemented carbide cutting tool materials and manufacturing technology, and in particular relates to a nano-modified cemented carbide grain growth inhibitor and a preparation method thereof. Background technique [0002] Nano WC cemented carbide has extremely high strength, hardness and toughness, which provides a new technical approach for the development of cemented carbide materials. However, the nanonization of WC powder tends to generate large surface energy and lattice distortion energy, which are fully released during the sintering process, resulting in the growth of WC grains. In order to suppress the growth of WC grains, the methods of rapid sintering and rapid cooling are usually adopted. At present, the commonly used advanced sintering technologies mainly include: spark plasma sintering technology, hot pressing sintering, hot isostatic pressing sintering, etc. Although these advanced sintering technologie...

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 Patents(China)
IPC IPC(8): C22C1/06C22C1/05B82Y40/00
CPCB82Y40/00C22C1/051C22C1/06
Inventor 杨毓杰王林志
Owner 重庆强锐科技有限公司