Composite material hammer head of crusher and method for casting same

A composite material and crusher technology, applied in grain processing and other directions, can solve the problems of separation of composite material layer and metal matrix, failure of hammer head, and insufficient use of microscopic shadow effects.

Inactive Publication Date: 2011-02-09
XI AN JIAOTONG UNIV
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  • 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 result, the composite material layer is often separated from the metal matrix during the actual operation of the hammer head, resulting in premature failure of the hammer head, so that the microscopic shadow effect of the reinforcing particles in the composite material layer cannot be fully exerted

Method used

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  • Composite material hammer head of crusher and method for casting same
  • Composite material hammer head of crusher and method for casting same
  • Composite material hammer head of crusher and method for casting same

Examples

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Embodiment 1

[0028] Embodiment 1: see figure 1 , first use sodium silicate sand to shape the hammer head of the crusher, and then make the hardness 2500-3000Hv, density 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm are filled in several identical columnar metal meshes made of 1Cr18Ni9Ti, with a bottom diameter of 10 mm, a length of 30 mm, a metal wire diameter of 220 μm, and a mesh size of 280 μm×280 μm. Several prefabricated bodies 2 are placed side by side (working surface or striking surface) of the mold cavity 1 side by side. 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, and the vacuum degree is 0.12MPa. Then the molten metal is poured out of the furnace. When pouring The molten metal enters the mold cavity 1 through the sprue cup 4, the sprue 5 ...

Embodiment 2

[0040] Embodiment 2: see attached figure 1 , first use resin sand to shape the hammer head of the crusher, and then set the hardness to 2500-3000Hv and density to 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm are filled in several identical columnar metal meshes made of 1Cr18Ni9Ti, with a bottom diameter of 10 mm, a length of 28 mm, a metal wire diameter of 220 μm, and a mesh size of 280 μm×280 μm. Several prefabricated bodies 2 are placed side by side (working surface or striking surface) of the mold cavity 1 side by side. 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 vacuum degree is 0.12MPa, and then the molten metal is poured out of the furnace. The liquid enters the mold cavity 1 through the sprue cup 4, the sprue 5 and the in...

Embodiment 3

[0052] Embodiment 3: see attached figure 1 , first use resin sand to shape the hammer head of the crusher, and then set the hardness to 2500-3000Hv and density to 15.8-16.5g / mm 3 , WC particles with a particle size of 300 μm to 750 μm are filled in several identical columnar metal meshes made of 1Cr18Ni9Ti, with a bottom diameter of 10 mm, a length of 32 mm, a metal wire diameter of 220 μm, and a grid size of 280 μm×280 μm. Several prefabricated bodies 2 are placed side by side (working surface or striking surface) of the mold cavity 1 side by side. 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 1500°C; the vacuum pump is started 5 minutes before the molten metal is released, and the vacuum degree is 0.12MPa. Then the molten metal is poured out of the furnace. The liquid enters the mold cavity 1 through the sprue cup 4, the sprue 5 and the ingate 6, cr...

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Abstract

The invention provides a composite material hammer head of a crusher and a method for casting the same. The hammer head is designed aiming at the defects of easy abrasion, short service life, and the like in the prior hammer head of the crusher. The casting method comprises the following steps that: firstly, a metal matrix material is smelted by an electric furnace to form molten metal; WC particles are filled in a columnar metal net; after sealing, a pre-casting product is formed and placed on the end face side of a mould cavity of a mould; a vacuum pump is started 5min before the molten metal is discharged; the discharged molten metal is cast; and the vacuum pump is closed 4min after casting. A hammer body of the composite material hammer head, which is prepared by the method, is high manganese steel, alloy steel or plain carbon steel, and the hammer end, namely working face or striking face, is formed by the metal matrix and column-shaped reinforced bodies evenly distributed in themetal matrix; the hardness of the columnar reinforced bodies is between HRC55 and 67, so that the hammer head has excellent anti-impact and anti-abrasion properties; and the interfaces between the reinforced bodies and the metal matrix and the interfaces of the WC particles in the columnar reinforced bodies and a basal body are in good metallurgical combination, and the combination strength is high.

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 a double shadow anti-wear effect and a 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 materials. Acco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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