Wear-resistant hammer head of hammer crusher and preparation method thereof

Abstract

The invention discloses a wear-resistant hammer head of a hammer crusher and a preparation method thereof. The wear-resistant hammer head comprises an end part of the hammer head and a handle part of the hammer head, and is characterized in that the end part of the hammer head is made of high-chromium cast iron which comprises the following components in percentage by weight: 2.40-3.20 percent of C, 0.30-1.50 percent of Si, 0.50-2.0 percent of Mn, 12.0-18.0 percent of Cr, less than or equal to 0.10 percent of P, less than or equal to 0.06 percent of S, 0.04 percent of Ce, 0.10-0.20 percent of V and the balance of iron; the handle part of the hammer head is made of medium carbon low-alloy steel which comprises the following components in percentage by weight: 0.30-0.50 percent of C, 0.30-1.0 percent of Si, 0.70-1.5 percent of Mn, 1.0-3.0 percent of Cr, 0.15-0.25 percent of Mo, less than or equal to 0.04 percent of P, less than or equal to 0.04 percent of S and the balance of iron; a liquid-liquid double metal composite wear-resistant hammer head is cast by using a hollow cavity of lost foam, and the casting process is controlled to prepare a double liquid-double metal composite hammer head with interfaces bonded through metallurgical bonding. The handle part of the hammer head is made of the medium carbon low-alloy steel, and the end part of the hammer head is made of the high-chromium cast iron. The service life of the hammer head can be improved by 2-3 times compared with that of a high-manganese steel hammer head without changing the manufacturing cost.

Description

technical field [0001] The invention relates to a hammer head and a preparation method thereof, belonging to the technical field of metal smelting. Background technique [0002] Hammer crushers are widely used in building materials, mining, metallurgy, electric power, and chemical industries. The hammerhead is subjected to complex forces during work, and it is subject to repeated impacts, extrusion, shearing, and contact fatigue. The working conditions are harsh, and it belongs to the Key accessories consume a large amount of metal materials each year. Therefore, developing a new type of low-cost, excellent toughness and high wear resistance hammer has become an urgent problem to improve the operating rate of hammer crushers in China. From the requirements of working conditions Starting, the wear part of the end of the hammer head requires high hardness, good impact resistance, and good wear resistance; the installation part of the hammer head handle requires good toughness,...

AI Technical Summary

Problems solved by technology

Among them, the composite interface of the liquid-solid bimetal composite hammer has mechanical bonding, the bonding strength is low, and cracks, pieces and fracture defects are prone to occur, which is unsafe to use, while the composite interface of the liquid-liquid bimetal composite hammer is metallurgical bonding. The bonding strength is high, wear-resistant and safe in use. The preparation method of liquid-liquid bimetallic composite hammer head is generally adopted at home and abroad. Resin sand molding process, the hammer head installation hole of this process is formed by a core, and more sand is required for molding box, equipped with tooling accessories, complex operation process, low production efficiency and high production cost

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