Dual-compound wear-resisting hammer and manufacturing method thereof

Abstract

The invention discloses a dual-compound wear-resisting hammer comprising a hammer handle and a hammer body; the hammer body is formed by compound casting of two kinds of metal liquids, and the hammer body is in casting connection with the solid hammer handle to form the hammer. The manufacturing method includes the following steps: step 1, manufacturing and casting a sand mold according to a structure of the hammer; step 2, processing the hammer handle with a low-alloy steel blank material, and preburying one end of the hammer handle into the casted sand mold of the hammer; step 3, selecting high-chromium cast iron and carbon steel, and carrying out quantitative pouring in sequence; and step 4, carrying out heat treatment. The dual-compound wear-resisting hammer not only can improve wear resistance of the hammer but also allows the hammer body and the hammer handle to be combined closely and not generate cracks, casting defects are overcome, the product yield is improved, the cleaning workload is reduced, and the quality and the service life of the hammer are improved substantially.

Description

technical field [0001] The invention relates to a manufacturing process of a double-composite wear-resistant hammer head, which belongs to the technical field of novel composite material preparation. Background technique [0002] The hammer head is a key accessory on hammer crushers widely used in mining, building materials, electric power, metallurgy and chemical industries, and it is also a wearable part with huge consumption. The hammer head as a whole is divided into two parts, the hammer handle and the hammer body, according to the different working properties. The hammer handle requires higher strength and toughness, while the hammer body requires higher wear resistance. For a long time, the hammer head is mostly made of high manganese steel, which not only ensures the strength and toughness of the hammer handle, but also uses the work hardening of high manganese steel to meet the wear resistance of the hammer body. The matrix structure of high manganese steel is aust...

AI Technical Summary

Problems solved by technology

The pouring temperature of high chromium cast iron is 1350-1400°C, and the melting point of carbon steel is around 1500°C; therefore, it is difficult to form a metallurgical bond between the high chromium cast iron hammer body and the carbon steel hammer handle

There are two ways to solve this problem: 1) By changing the structure of the hammer handle and forming a mechanical bond with the high-chromium cast iron hammer body, but its bonding force is not as good as metallurgical bonding; 2) By greatly increasing the pouring temperature of the high-chromium cast iron, the hammer body and the hammer body can be achieved. The metallurgical combination of the shank, but chromium is an easily oxidized element, and increasing the temperature will easily cause chromium element burning and the formation of oxidized inclusions

In addition, high chromium cast iron is a brittle material, and it is easy to form cracks when it is hindered by the carbon steel hammer handle during solidification and shrinkage, and gradually expands until it breaks when the hammer head is working.

[0007] According to the forming method of the composite wear-resistant hammer head in the current existing technology, the wear resistance of the hammer head can be improved and the service life can be extended; however, various types of casting defects are prone to occur, which affects the quality and service life of the hammer head, and further improvement and perfection are needed.

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