Method for preparing composite wear-resistant hammerhead

Abstract

The invention discloses a method for preparing a high-ductility and high-abrasion composite hammerhead, which comprises the following steps: alloy dust core bars are bound into bundles and arranged in a hammerhead casting mould cavity, and the volume of the alloy dust core bars accounts for 20 to 60 percent of the total volume of the hammerhead; molten matrix metal is cast into the casting mould cavity, the alloy dust core bars are melted and dissolved under the heat effect of the matrix metal, a great number of alloy elements and the molten matrix metal generate metallurgical combination reaction so as to generate a highly dispersed alloy structure on the original position; and finally the alloy structure is cooled and solidified, and the bar-shaped hard phase is metallurgically and transitionally combined into a whole with the matrix metal, thereby preparing the composite hammerhead which takes the high-strength and high-ductility metal as the matrix and contains a certain number of metallurgically combined bar-shaped hard points. The composite hammerhead has high strength and high ductility of the matrix metal and high hardness and high wear resistance of the hard phase, can simultaneously bear high pressure and strong wear, and has the characteristics of long service life, low price and so on.

Description

technical field [0001] The invention relates to the preparation of a hammer on a crusher for crushing coal, ore, etc., in particular to a method for preparing a composite wear-resistant hammer. The composite wear-resistant hammer prepared by the method contains columnar hard points, which realizes The organic unity of abrasiveness and toughness significantly improves the overall mechanical properties of the hammer head. Background technique [0002] The hammer head is the main wear part on the material crushing machinery in metallurgy, building materials, chemical industry, coal, refractory materials, electric power and other industries. [0003] At present, there are two main types of hammerhead materials used in various industries: one is a single material high manganese steel hammerhead; the other is a composite hammerhead. The traditional high manganese steel single-material hammer head has poor wear resistance and short service life. The composite hammer head is gener...

AI Technical Summary

Problems solved by technology

The initial use effect of this kind of mechanically assembled hammer head is better, but in the later stage of use, due to the separation and flying out of the hammer handle and hammer head, production accidents such as breaking through the crusher and damaging other hammer heads often occur, resulting in serious economic losses.

The composite hammer head in the form of casting is easy to fall off during use due to the non-metallurgical combination of the wear-resistant bar and the matrix

Under impact conditions, the dovetail groove structure is adopted, and the dovetail structure breaks, causing the entire hammer head to fly out at high speed.

When using the co-casting method, cracks often appear in the occlusal part of the dovetail structure during the casting process, and the cracks often lead to premature failure of the hammer during use.

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