Composite material hammer head of crusher and method for casting same

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...

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

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