Composite material tup and its casting method

Abstract

The present invention is composite material tup and its casting process. The casting process includes the steps of: smelting metal mother material in electric furnace to form metal liquid, prefabricating WC grains in polystyrene foam and setting the polystyrene foam in the end side of tup mold cavity, installing the tup mold onto the turntable of vertical centrifugal casting machine, pouring metal liquid in the pouring speed of 5-28 kg / s while rotating the centrifugal casting machine at 50-200 rpm, raising the rotation speed to 500-900 rpm after pouring and rotating for other 3-10 min, and stopping the machine and cooling. The composite material tup has WC grain reinforced composite material in the work surface, and the composite material has hardness of HRC 55-67, thickness of 6-20 mm, excellent impact resistance and wear resistance, excellent metallurgical combination to the metal mother body, high combination strength between the WC grains and the matrix.

Description

technical field [0001] The invention relates to a method for manufacturing a crusher hammer, in particular to a composite material hammer and a casting method thereof. Background technique [0002] Hammer crusher is commonly used crushing equipment in metallurgy, mining, building materials and electric power industries. The hammer head is the main wearable part. Its working principle is to rely on the high-speed rotating hammer head to hit the material entering the crushing bin to achieve crushing. For the purpose, 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. Therefore, it is an urgent problem to develop new hammer head materials and its processing and forming technology to improve the service life of the hammer head. [0003] At present, the crusher hammers used ...

AI Technical Summary

Problems solved by technology

The manufacturing process of this type of hammer head is complicated, the cost is high (especially for cemented carbide), and the process stability is poor, and defects such as cracks and stress concentration are prone to occur at the joint site. Separation, resulting in premature failure of the hammer head; the surfacing hammer head uses a special anti-wear electrode to weld a layer of high-hardness wear-resistant layer on the end (strike surface or working surface) of the alloy steel or carbon steel hammer head. The disadvantage is that the surfacing welding process is complicated, the process control is difficult, and there are a large number of micro-cracks, inclusions, pores and other defects in the surfacing welding layer. Therefore, the peeling and falling of the surfacing welding layer during operation are its main failure forms.

[0004] In the world, there are alloy steel hammers produced by West German Beliquius and high chromium cast iron-low carbon alloy steel composite casting hammers produced by Japan Kawashima Company. The former has poor wear resistance, while the latter is prone to steel detachment due to composite casting. Phenomenon

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