Laser surface intensified technique for roller of rolling section bar

Abstract

This invention discloses a process for laser surface enhancement of roller for rolling profiles. The process comprises: processing the roller by turning to remove the surface fatigue layer, inspecting damage, pretreating the surface, loading into a laser processing machine tool, uniformly spraying light-absorption material onto the roller body by a spray gun to completely coate the sites to be processed, drying the light-absorption material, and performing enhancement treatment by selecting laser intensity indexes. The enhancing layer of the treated roller has a thickness of 0.8-1.5 mm, and hardness in HRC 47-53 range. The enhancing layer does not produce any crack. The treated roller does not deform, and the surface roughness can satisfy machining requirements. The treated roller has good toughness and good anti-fatigue ability.

Description

technical field [0001] The invention belongs to the laser surface treatment technology, and relates to a laser surface strengthening process for profile rolling rolls in a universal production line of a steel rolling enterprise, in particular to a laser surface strengthening process for profile rolls. Background technique [0002] The roll (commonly known as BD2) of the second rolling mill of Panzhihua Iron and Steel Universal Production Line is the key spare part for rolling profiles. / m, 60Kg / m, 50Kg / m, 43Kg / m heavy rail, the roll body bears huge high-speed alternating rolling pressure during work, the square steel is basically formed after passing through this rolling mill, the reduction is large during rolling, and the pass shape Abrasion is large, and it is required to have certain red hardness, wear resistance and fatigue resistance at high temperature. The production of BD2 rolls needs to go through steelmaking, forging, normalizing and other processing procedures. T...

AI Technical Summary

Problems solved by technology

The production of BD2 rolls needs to go through steelmaking, forging, normalizing and other processing procedures. The production cycle is long, the one-time occupation of capital is large, and the manufacturing cost is expensive. A pair of BD2 rolls is worth about 1.5 million yuan. Under normal use, a pair of BD2 rolls can be used 7-8 times on the machine. For this reason, metallurgical enterprises need to spend huge sums of money to purchase new rolls every year, resulting in large capital occupation, high cost, and large inventory.

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