A method and equipment for local laser melt injection bionic strengthening of roll surface

Abstract

The invention provides local laser melt injection bionic enhancement equipment for a roller surface. The equipment comprises a control unit, a bionic structure body vision monitoring system, a precision ceramic powder feeder, a laser generator and a four freedom degree numerical control machinery working table, wherein the control unit is respectively connected with the bionic structure body vision monitoring system, the precision ceramic powder feeder, the laser generator and the communication interface system of the four freedom degree numerical control machinery working table. According to the present invention, the laser melt injection method is adopted, the wear resistance biological prototype is researched from the bionic perspective based on the geometric characteristics of the wear area on the roller surface, and the wear resistance structure of the biological prototype is "copied" on the roller surface through laser melt injection from the roller surface enhancement stress strain reduction perspective so as to improve wear resistance of the roller surface, prolong the service life of the roller, and provide a new method for roller surface enhancement.

Description

technical field [0001] The invention belongs to rolls for rolling profiles. Background technique [0002] In recent years, the application range of high-speed steel rolls and cemented carbide combined rolls has become more and more extensive. However, at present, most domestic rolling mills still use cast steel rolls and ductile iron rolls in large quantities, especially the consumption of nodular iron rolls in the rough rolling unit and the finishing rolling unit is very large. In the process of rolling various wire rods, bars, narrow strips, medium strips, and seamless steel pipes, the rolls work under the conditions of high temperature, high load and high speed, and the surface cracks tend to be serious, sometimes even just after treatment. Long cracks appear before service begins, and temper softening occurs in the scanning lap area of ​​the laser beam, resulting in "soft and hard bands" on the surface of the roll. The depth of the strengthening layer is not enough to m...

AI Technical Summary

Problems solved by technology

As for the problem of improving the wear resistance of rolls, it is mainly limited to surface coating, laser surface modification, surface chemical treatment, and the chemical composition, structure, and heat treatment of materials. This is a surface resistance developed from the perspective of materials. Grinding technology, processing and manufacturing difficulties

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