Laser nanometer cermet alloying process for surface of metallurgic hot roller

Abstract

The laser nanometer cermet alloying process for surface of metallurgical hot roller includes the following steps: 1. machining the roller to eliminate surface fatigue layer to obtain required size and shape, grinding the surface to be laser treated, eliminate dirt and cleaning properly; 2. mixing phenolic resin adhesive and nanometer carbide ceramic paint homogeneously and coating the mixture to the surface of the roller in the thickness of 0.01-0.05 mm before air drying; and 3. scanning the nanometer ceramic coating on the surface of the roller fast with high power CO2 laser in the technological parameters of laser power 1,000-10,000 W, scanning speed of 1.5-20 m / min, lapping rate of 15-35 % and light spot diameter of 0.6-5 mm. The present invention has optimized technological parameters, and can result in solid solution reinforcing and dispersion reinforcing effect, raise the heat stability of the alloy layer, and raise the strength, plasticity and toughness of the alloy layer.

Description

(1) Technical field [0001] The invention relates to a metallurgical hot roll surface strengthening and repair process, in particular to a metallurgical hot roll surface laser nano-ceramic alloying process. (2) Background technology [0002] The roll is a tool for plastically deforming (rolled material) metal, and is an important large-scale consumable part that determines the efficiency of the rolling mill and the quality of the rolled material. The quality and service life of rolls are directly related to the production efficiency, product quality and production cost of rolling production. The supply of roll materials in our country is insufficient and the price is high. Once the surface of the roll wears out and fails, the entire roll will be scrapped (the layer of the roll only accounts for about 10% of the total weight of the roll), which will cause a huge waste of materials. How to repair failed rolls has always been a major problem faced by the roll manufacturing indu...

AI Technical Summary

Problems solved by technology

[0003] Due to the harsh working conditions and materials of the hot roll, conventional surface strengthening techniques such as flame quenching, high-frequency quenching, plasma spraying and spray welding, arc surfacing, etc. cannot effectively improve the resistance of the roll surface to high temperature wear and cracking

The laser strengthening treatment of the roll surface adopted by many domestic and foreign iron and steel manufacturers is generally laser quenching and melting process methods. Or the effect of infinite chilled alloy cast iron rolls is not obvious, and even reduces its service life