Composite material hammerhead of crusher and negative pressure casting method thereof

A composite material and negative pressure casting technology, which is applied in grain processing and other directions, can solve the problems that the microscopic shadow effect of reinforced particles is not fully exerted, the hammer head fails, and the composite material layer is separated from the metal matrix.

Inactive Publication Date: 2009-09-16
XI AN JIAOTONG UNIV
View PDF10 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for the hammer head of some large crushing equipment, it not only has to resist the severe abrasion of the material (such as ore), but also needs to withstand the strong impact of the material (the hammer head speed is as high as 420 rpm, and the ore sometimes weighs As a r...

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
  • Composite material hammerhead of crusher and negative pressure casting method thereof
  • Composite material hammerhead of crusher and negative pressure casting method thereof
  • Composite material hammerhead of crusher and negative pressure casting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: see figure 1 , first use sodium silicate sand to shape the hammerhead of the crusher, with a hardness of 2500-3000Hv and a density of 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm and a mass percentage of 20% of borax, 17% of Na 2 SiO 3 12H 2 O, the balance is that the binder made of water is mixed into a paste according to the mass ratio of 100:6, and filled in several bottom surfaces made of 1Cr18Ni9Ti with a diameter of 10mm and a length of 35mm, and the diameter of the metal wire constituting the metal mesh 220 μm, grid size 300 μm×300 μm columnar metal mesh, sealed and dried at 200°C to form several preforms 2 and placed on the end face side of the mold cavity 1. A 250kg medium-frequency induction furnace is used to melt high manganese steel to form molten metal. The temperature of the molten metal is 1540°C, and the pouring temperature is 1470°C. The vacuum pump is started 5 minutes before the molten metal is released, a...

Embodiment 2

[0038] Embodiment 2: see attached figure 1 , first use resin sand to shape the hammer head of the crusher, with a hardness of 2500-3000Hv and a density of 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm and a mass percentage of 18% borax, 15% Na 2 SiO 3 12H 2 O, the balance is that the binder made of water is mixed into a paste according to the mass ratio of 100:4, and filled in several bottom surfaces made of 1Cr18Ni9Ti with a diameter of 10mm and a length of 32mm, and the diameter of the metal wire constituting the metal mesh 220 μm, grid size 300 μm×300 μm columnar metal mesh, sealed and dried at 150°C to form several preforms 2 and placed on the end face side of the mold cavity 1. A 250kg intermediate frequency induction furnace is used to smelt alloy steel to form molten metal. The temperature of the molten metal is 1650°C, and the pouring temperature is 1580°C; the vacuum pump is started 5 minutes before the molten metal is released, and the v...

Embodiment 3

[0048] Embodiment 3: see attached figure 1 , first use resin sand to shape the hammer head of the crusher, with a hardness of 2500-3000Hv and a density of 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm and a mass percentage of 15% of borax, 13% of Na 2 SiO 3 12H 2 O, the balance is that the binder made of water is mixed into a paste according to the mass ratio of 100:5, and filled in several bottom surfaces made of 1Cr18Ni9Ti with a diameter of 10mm and a length of 30mm, and the diameter of the metal wire that constitutes the metal mesh 220 μm, grid size 300 μm×300 μm columnar metal mesh, sealed and dried at 100°C to form several preforms 2 and placed on the end face side of the mold cavity 1. A 250kg medium-frequency induction furnace is used to melt carbon steel to form molten metal. The temperature of the molten metal is 1600°C, and the pouring temperature is 1530°C; the vacuum pump is started 5 minutes before the molten metal is released, and t...

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
Granularityaaaaaaaaaa
Bottom diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite material hammerhead of a crusher and a negative pressure casting method thereof. The negative pressure casting method comprises that: firstly, a metal parent material is subjected to electric smelting to form molten metal; WC particles and a bonding agent are mixed and prepared into paste, the paste is filled in a columnar metal screen which is then baked in a sealed mode to form a prefabricated body, and the prefabricated body is placed on the end face side of a mould cavity; a vacuum pump is started 5 minutes earlier than the tapping of the molten metal, and then the molten metal is tapped off for casting; and the vacuum pump is switched off after 4 minutes of the casting completion. The composite material hammerhead hammer body obtained by the preparation method is made of high manganese steel, alloy steel or common carbon steel; a hammer end, namely a working face or a striking face consists of a metal matrix and columnar reinforcers uniformly distributed in the metal matrix, wherein the columnar reinforcers are made of a composite material formed through infiltration of a ceramic particle prefabricated body and mother liquor metal, and have the hardness of HRC55-67 and excellent impact abrasion resistance; and the interface of the columnar reinforcers and the metal matrix, and the interface of the WC particles in the reinforcers and a substrate have good metallurgical bonding and high bonding strength.

Description

technical field [0001] The invention relates to a method for manufacturing a crusher composite material hammer, in particular to a crusher composite material hammer with double shadow anti-wear effects and a negative pressure casting method thereof. Background technique [0002] Crusher (hammer crusher, vertical shaft crusher, etc.) is an essential equipment for crushing minerals and building materials in mining, metallurgy, building materials, cement, transportation and other industries, and the hammer head is an important work in the crusher. Parts and wearing parts, its working principle is to rely on the high-speed rotating hammer head to hit the material entering the crushing bin to achieve the purpose of crushing the material. The main failure mode of the hammer head is wear and fracture. For a long time, the hammer head of the crusher has poor wear resistance, short service life and frequent replacement, which are the key factors restricting the crushing efficiency of...

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): B22D18/06B02C13/28
Inventor 李烨飞高义民邢建东鲍崇高皇志富
Owner XI AN JIAOTONG 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