Composite material hammerhead of crusher and negative pressure casting method thereof

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 havethe 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

Composite material hammer head of crusher and negative pressure casting method thereof technical field 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 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 repl...

AI Technical Summary

Problems solved by technology

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

Images