One-piece mosaic-type casting impact-breaking rotor body and its preparation process

Abstract

The invention discloses an integrated insert-type casting impact crushing rotor body and a preparation process thereof, comprising: a rotor mother body, the surface of the rotor mother body is evenly inlaid and cast with a plurality of wear-resistant alloy rods, the wear-resistant alloy rods are The mass calculation includes the following components: TiC accounts for 37.5-38.5%, Fe accounts for 26.5-27.5%, Ni accounts for 4.6-5.0%, Mo accounts for 3.0-3.4%, Mn accounts for 19.5-20.5%, Cr accounts for 4.5-5.5%, Rare earth elements account for 2%. In the process of preparation, the method of insert casting is adopted. Through the above method, the present invention can not only improve the heat treatment performance of the wear-resistant alloy rod under the condition that the wear-resistant alloy rod still has sufficient wear resistance, thereby making the wear-resistant alloy rod and After the rotor matrix is ​​combined, it can be heat-treated together to obtain the mechanical properties required by the design, and the production process is simple, and there is no need to stop and repair during the use process, thereby reducing the use cost.

Description

technical field [0001] The invention relates to a core part of a crushing machine, in particular to an integrated mosaic casting counter-attacking rotor body and a preparation process thereof. Background technique [0002] The impact crusher is mainly used in the processing of metallurgy, building materials and other materials that need to be relocated. When the machine is working, driven by the motor, the rotor body rotates at a high speed. The counterattack device is broken again. Since the rotor body is constantly impacted and squeezed by the stone, the rotor body wears quickly and requires frequent maintenance and replacement in the later period. [0003] At present, the rotor body on the market is basically composed of steel plate welding, and the impact and extrusion parts are surfacing with high chromium cast iron wear-resistant layer. Due to the high hardness of the wear-resistant layer and poor impact resistance, the wear-resistant layer often peels off during use. ...

AI Technical Summary

Problems solved by technology

[0003] At present, the rotor body on the market is basically composed of steel plate welding, and the impact and extrusion parts are surfacing with high chromium cast iron wear-resistant layer. Due to the high hardness of the wear-resistant layer and poor impact resistance, the wear-resistant layer often peels off during use. This phenomenon requires downtime for maintenance and surfacing welding, which not only affects work efficiency but also increases maintenance costs. In addition, the rotor body composed of steel plate welding is subject to high-strength crushing impact for a long time, and cracks are prone to occur at the weld. Once the crack extends to the entire rotor body, it cannot continue working

[0004] On this basis, there are more rotor bodies inlaid with cast wear-resistant rods, but most of the conventional wear-resistant rods are made of cermet hard alloy, that is, titanium carbide matrix alloy. Although this alloy has ultra-high Hardness and wear resistance, but high brittleness, low impact value, can not be heat treated, and because the rotor matrix is ​​low-alloy steel, it needs quenching and tempering treatment to achieve the required mechanical properties, so how to ensure wear resistance Under such circumstances, it is a difficult problem that urgently needs to be solved at present, so that the alloy rod can be heat-treated together with the parent body to achieve the optimization of performance.

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