Process for novel preparing cutting tooth of coal cutter

A technology for shearers and picks, which is applied in the direction of manufacturing tools, furnace types, heat treatment equipment, etc., can solve the problems of short service life of shearer picks, reduce coal mining costs, prolong service life, and improve coal mining efficiency Improved effect

Inactive Publication Date: 2015-03-25
SHENYANG POLYTECHNIC UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a preparation process for a new overall wear-resistant pick for a shearer, and its purpose is to solve the technical problem of short service life of the shearer pick; to improve coal mining efficiency and reduce coal mining cost

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
  • Process for novel preparing cutting tooth of coal cutter
  • Process for novel preparing cutting tooth of coal cutter
  • Process for novel preparing cutting tooth of coal cutter

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0021] Below in conjunction with accompanying drawing, the present invention will be further described:

[0022] The purpose of the present invention is to manufacture a new type of cutting tooth for a coal mining machine, which has the same shape and size as the existing cutting tooth, and the cutting body has excellent wear resistance from the inside to the outside, so that it can be extended The service life of picks. In the research process, three important problems must be solved: first, the casting process must ensure uniform structure and composition to improve the wear resistance of cast steel; second, cold work and strengthen the cast pick body. The hardness and wear resistance of the final pick body should exceed the existing pick; the third is to ensure that the hole at the front end of the pick body and the cemented carbide post maintain an interference fit when installing the cemented carbide post, but the amount of interference It must be less than ±0.005mm, so ...

Embodiment 1

[0032] In this example, 50 kg of molten steel was smelted, and 1 kg of wear-resistant alloy was added, the proportion of which was 2%. 49 kg of medium-carbon low-alloy steel raw materials were prepared, accounting for 98% of the total mass of molten steel. The composition of medium carbon low alloy steel is as follows: C: 0.45%; Si: 0.34%; Mn: 0.65%; S: 0.001%; ​​P: 0.001%; ​​Gr: 1.05%; Ni: 2.15%; Mo: 0.50%; Impurities are less than 0.35%, and the balance is iron Fe.

[0033] The implementation process is as follows:

[0034]Using casting technology to prepare a new type of pick body, first prepare the charge according to the above-mentioned medium-carbon low-alloy steel composition, and use an induction furnace to melt the charge first; raise the temperature of the electric furnace to 1550°C to fully melt the charge, remove the slag and carry out rapid pre-furnace composition Analysis to ensure that the composition of the molten steel in the furnace complies with the above-m...

Embodiment 2

[0038] In this embodiment, a total of 50 kg of molten steel was smelted, wherein 4 kg of wear-resistant alloy was added, and its ratio was 8%; 46 kg of medium-carbon low-alloy steel raw material accounted for 92% of the total mass of molten steel, and the described medium-carbon low-alloy composition was as follows: C: 0.3 %; Si: 0.15%; Mn: 0.45%; S: 0.001%; ​​P: 0.001%; ​​Gr: 1.20%; Ni: 1.85%; Mo: 0.6%; .

[0039] The manufacturing process is as follows:

[0040] Use casting technology to prepare a new type of pick body, prepare the furnace charge according to the above-mentioned medium-carbon low-alloy steel composition range, raise the temperature of the electric furnace to 1550°C to melt the charge, remove the slag and conduct a rapid composition analysis before the furnace to ensure that the composition of the molten steel in the furnace meets the requirements. Add wear-resistant alloy to the above-mentioned medium-carbon low-alloy steel, then increase the temperature by...

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
densityaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

The invention relates to a process for preparing a novel cutting tooth of a coal cutter. A tooth body of the cutting tooth is formed by casting; and according to components of the cutting tooth body, a nano-composite abrasion-resistant alloy used for abrasion-resistant steel is added into medium-carbon low-alloy steel to improve the abrasion resistance of the cutting tooth body. The ratio of the abrasion-resistant alloy added into the novel cutting tooth is 2 to 15 percent, and the medium-carbon low-alloy steel accounts for 95 to 98 percent of total mass of molten steel. According to the process for preparing the novel cutting tooth, the components are homogenized by smelting, and then the cutting tooth body is obtained by casting; the casted cutting tooth body is machined and reinforced; and cemented carbide is pressed into a hole at the front end of a tooth head by a hot-press technology, the inner diameter of the hole at the front end of the tooth head and the outer diameter of a cemented carbide column are in interference fit, and the magnitude of interference is less than 0.005mm.

Description

technical field [0001] The invention relates to a new-type pick for coal shearers (abbreviation: new-type pick, the same below) and its preparation technology. In particular, it is a novel overall wear-resistant pick used for coal shearers, and the preparation process of the pick. Background technique [0002] The pick is a tool for cutting coal and rock in the process of coal mining. Picks are subjected to harsh environments with high wear and tear during service, and have a short service life and high consumption. They are one of the most frequently replaced coal mining machinery components. The wear of the pick body is the main failure mode in the normal coal mining process, so the wear resistance of the pick body determines the coal mining efficiency. At present, the main way to improve the performance of the pick body is to use thermal spraying, ion beam surface metallurgy and surfacing welding to strengthen the surface of the pick body, but the surface strengthening ...

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): C22C33/04C22C38/44C21D9/00
Inventor 韩阳韩亚玲张爱玲张志涛毛亚男刘伟男
Owner SHENYANG POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap