Method for preparing composite crushing wall and composite rolled mortar wall

Abstract

The method discloses a method for preparing a composite breaking wall and a composite rolling wall, wherein the prepared composite breaking wall and the composite rolling wall have a composite wear resistant layer respectively. The method comprises the following steps: weaving alloy powder core wire materials into a three-dimensional framework structure; welding the three-dimensional wire material framework to a groove rolled in the outer wall of the breaking wall and a groove in the inner wall of the rolling wall respectively; through a casting method, pouring high temperature molten steel or molten cast iron into the three-dimensional wire material framework; and performing in situ reaction on alloy powder core wire / strip materials to generate a columnar hard alloy phase by using the high temperature of the molten metal, and performing the metallurgical combination of the hard alloy phase and a base metal phase interface to form a composite wear resistant layer with certain thickness in the groove in the outer wall of the breaking wall and the groove in the inner wall of the rolling wall respectively. Compared with other products of the same type, the composite breaking wall and the composite rolling wall have the characteristics of high wear resistance, high toughness, high tensile strength, high compression strength and the like, thus the use performance and the service life of the composite breaking wall and the composite rolling wall are improved. The method has the characteristics of small equipment input, low cost, strong process controllability, high rate of finished products and the like.

Description

technical field [0001] The invention relates to mechanical equipment in the fields of general crushing, grinding and crushing, and in particular to a method for preparing a composite crushing wall and a composite rolling mortar wall used in a cone crusher. Background technique [0002] Cone crushers are medium and fine crushing equipment widely used in coal, metallurgy, mining, building materials, refractory materials, energy and other industrial industries. The main wear parts of the cone crusher are the movable cone crushing wall and the static cone rolling socket wall lining. Under the working conditions of the cone crusher, the two linings are subjected to wear, impact, extrusion, shearing and high-frequency cyclic stress at the same time. The performance of the lining directly affects the grinding efficiency and quality of raw materials, as well as the use of equipment. life. At present, the wear-resistant linings of the crushing wall and the rolling wall used in the ...

AI Technical Summary

Problems solved by technology

In the crushing cavity between the crushing wall and the rolling mortar wall, the abrasive impact strength is small, and the work hardening effect is not significant, so it is difficult to achieve the ideal wear resistance effect with a single high manganese steel lining;

[0005] 2) The macroscopic hardness of multi-element low-alloy steel is about HRC40, which is low in hardness and cannot resist the pressing and scratching of hard abrasives. During the working process, a large amount of cutting wear and plastic deformation low-cycle fatigue wear occur on the surface of the lining;

[0006] 3) The research on the preparation of composite materials by powder metallurgy is still immature. The alloy components prepared by this method are difficult to distribute evenly in the matrix, and the controllability is poor, and due to the addition of surfactants, a large number of pores appear in the material structure and other defects;

[0007] 4) It is difficult to ensure the uniform distribution of cemented carbide particles in the metal matrix by adopting the surfacing method to combine the prepared cemented carbide particles with a wear-resistant lining, and the controllability is poor, and the molten metal produces a large amount of oxides at high temperatures. impurities and remain in the metal matrix, thereby affecting the wear resistance and toughness of the composite

[0008] Second, due to the use of linings with poor wear resistance and toughness, the working surfaces of the crushing wall and the rolling wall lining are severely worn. During the working process, they are often in working conditions that do not meet the design requirements, resulting in Poor crushing performance, uneven shape and particle size of crushed products, high energy consumption, high operating costs, etc.

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