Laser surface intensified technique for roller of rolling section bar

A technology of surface strengthening and rolling, applied in the direction of rolling, metal rolling, manufacturing tools, etc., can solve the problems of large capital occupation, long production cycle, large inventory, etc.

Inactive Publication Date: 2007-07-25
攀枝花钢城集团有限公司协力分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Laser surface intensified technique for roller of rolling section bar

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Embodiment Construction

[0008] In view of the commonality of the working conditions of various rolls, the process of rolling 60Kg / m heavy rails with BD2 rolls is taken as an example. This process can be popularized and used in 75Kg / m, 50Kg / m, and 43Kg / m heavy rails on the roll.

[0009] Strengthening adopts roll turning processing, flaw detection inspection, surface pretreatment, and laser strengthening treatment process.

[0010] 1. Roll turning

[0011] Before the laser surface strengthening treatment, the fatigue layer on the surface of the BD2 roll should be turned clean, so as to avoid uneven protruding lumps due to rapid heating and cooling during laser surface treatment, which will affect the rolling quality and small pieces of spalling during steel rolling .

[0012] 2. Flaw detection inspection

[0013] After turning, the BD2 rolls should be inspected for flaw detection, and the surface cracks of the rolls should be inspected with a magnetic particle flaw detector. The rolls with circumfe...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C21D1/09B21B27/00
Inventor 邹宏军杨建明杨胜东王建
Owner 攀枝花钢城集团有限公司协力分公司
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