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

Methods for preparing multiphase high-strength highly-wear-resistant silicon nitride ceramic cutting tool material and tool

A technology of silicon nitride ceramics and cutting tool materials, which is applied in the accessories of tool holders, cutting tools for lathes, turning equipment, etc., and can solve the problems of the impact of material compactness and insufficient wear resistance of products

Inactive Publication Date: 2014-06-25
广州腾亚工艺品有限公司
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN101538161 discloses the application of a silicon nitride ceramic material in the preparation of ceramic bearing balls, adopts the method of atmosphere sintering, and uses a variety of rare earth oxide sintering aids to produce a silicon nitride with high comprehensive performance Ceramic materials, but the method of atmosphere sintering has an impact on the compactness of the material, and the wear resistance of the produced product is insufficient, and the selection of sintering aids can still be refined

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
  • Methods for preparing multiphase high-strength highly-wear-resistant silicon nitride ceramic cutting tool material and tool
  • Methods for preparing multiphase high-strength highly-wear-resistant silicon nitride ceramic cutting tool material and tool
  • Methods for preparing multiphase high-strength highly-wear-resistant silicon nitride ceramic cutting tool material and tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The weight percentage (hereinafter referred to as wt%) is 89% α-Si3N4 powder, 1% is β-Si 3 N 4 Seed crystals and 8% of different rare earth oxide sintering aids, and different weight percentages of sub-densification aids (see Table 1 for details), mix the mixed powder with alcohol, ball mill for 48-80 hours, and dry , through a 100-mesh sieve, and then put it into a graphite grinding tool, under the pressure of 10-15MPa in a hot-pressed sintering furnace, 2 Warm up to 1750-1800°C for 20-40min, anneal at 1350°C for 1 hour, cool down to room temperature and process into required test samples, mirror polish, measure strength and hardness, and obtain sample results (see Table 2 for details).

[0037] Table 1

[0038]

[0039] Table 2

[0040]

Embodiment 2

[0042] Different weight percentages of α-Si 3 N 4 Powder, 1% β-Si 3 N 4 Seed crystals are mixed with different weight percentages of rare earth metal oxide sintering aids and corresponding weight percentages of sub-densification aids (see Table 3 for details), ball milled, dried, sieved, put into graphite grinding tools, and heated Under the pressure of 10-15MPa in the pressure sintering furnace, under N 2 Warm up to 1750-1800°C for 30-60min, then anneal at 1350°C for 1 hour, cool down to room temperature and process into required test samples, mirror polished, and measure strength and hardness (see Table 4 for details).

[0043] table 3

[0044]

[0045] Table 4

[0046]

Embodiment 3

[0048] The powders of samples 1, 5, 2A, and 3A were ball-milled, dried, sieved, and put into graphite grinding tools. 2 Rapidly raise the temperature to 1400°C-1450°C for 1min, then raise the temperature to 1750-1800°C for 20-40min, anneal at 1350°C for 1h, cool down to room temperature and process into required test samples, mirror polished, measure strength and hardness , (see Table 5 for details).

[0049] table 5

[0050]

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 discloses a method for preparing a multiphase high-strength highly-wear-resistant silicon nitride ceramic cutting tool material for processing cast iron and alloys as well as a method for preparing a ceramic tool made of the material. According to the method, alpha-sialon is grown in situ, the intergranular phase is reduced, the ceramic material is reinforced and toughened, and the obtained material has the bending strength of 900-1000MPa at room temperature, the breaking tenacity of 8-10MPa / m<2> and the hardness of 92-94.5HRA. Moreover, the ceramic material is processed into a tool by adopting the method, when the speed is 600m / in and the cutting length is 1000meters in the process of cutting nodular cast iron QT450-10, the flank wear is less than 0.4mm, and the cutting level of the tool is higher than that of a commercial tool in the conventional market.

Description

technical field [0001] The invention relates to a preparation method of silicon nitride ceramic cutting tool material, a multiphase high-strength and high wear-resistance material for processing cast iron and alloy cutting tools and a preparation method of the cutting tool. Background technique [0002] In recent years, silicon nitride ceramic cutting tools have been widely used in the field of modern processing due to their high hardness, strength, fracture toughness, small expansion coefficient, high temperature resistance and inexhaustible elements such as silicon and nitrogen in nature. However, with the continuous improvement of modern processing technology requirements, the requirements for the performance of corresponding materials are also rising, and the division of labor for materials due to their performance differences is becoming more and more refined. According to the performance of processed products, the matching ceramic tool materials are used. , can not onl...

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): C04B35/584C04B35/622B23B27/00
Inventor 王也
Owner 广州腾亚工艺品有限公司
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