Centrifugal casting process for shell of bimetal compound metallurgical wedge hob

Abstract

The invention relates to a centrifugal casting process for the shell of a bimetal compound metallurgical wedge hob, which sequentially comprises the steps of moulding, shell modification, spraying, mold shell assembling, molten steel smelting, deoxidization and slag removing, pouring, heat preservation and coring, blasting and sand removal, processing and finishing, heat treatment and the like. The wedge hob produced through the process above not only has the advantages of high hardness, good abrasion-resistance and the like, but also has good comprehensive mechanical properties such as stiffness, toughness and the like, thereby satisfying the requirements for strength and wear resistance of cutter teeth of the wedge hob, ensuring the manufacturability of the hob body, improving the service time of the cutter teeth of the wedge hob, and reducing the production cost.

Description

technical field [0001] The invention relates to mining machinery and equipment, in particular to a novel bimetal composite metallurgical centrifugal casting process for a wedge-toothed hob shell for rock-breaking drilling of a large vertical shaft drilling rig. Background technique [0002] Shaft drilling rig is a drilling machine used in coal field drilling, bridge pier, power station, geological exploration and other engineering construction. Knives are the type of knife commonly used for rock breaking hobs. [0003] The casing of the wedge-toothed hob for shaft drilling rigs is divided into two parts: the cutter body and the cutter teeth. The cutter body is the main body where the cutter shaft, bearings, and seals are installed. It requires compact structure, high machining accuracy, and good material rigidity. , Easy to process; the cutter tooth part is the main body of the rock breaking, directly contacting the rock, and the material is required to have high hardness a...

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