Built up welding technique of restoring roller for shape bar

A roll and process technology, applied in the field of profile roll surfacing welding repair process, can solve the problems of high manufacturing cost, long production cycle, and economic loss of metallurgical enterprises.

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 requires steelmaking, forging, normalizing and other processing processes. The production cycle is long, the one-time occupation of capital is large, and the manufact

Method used

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Examples

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Embodiment Construction

[0005] The process steps of the present invention are rough turning before roll welding, flaw detection, preheating, surfacing transition layer, surfacing working layer, post-welding heat treatment, turning of finished roll, and flaw detection.

[0006] In the process of surfacing the working layer, intermediate heat treatment is carried out respectively.

[0007] 1. Roller roughing before welding

[0008] The purpose of rough turning before welding is to remove the fatigue layer and surface defects on the surface of the roll. The minimum turning depth is not less than 3mm, depending on the thickness of the fatigue layer. It is required to completely remove the fatigue layer. Some surface defects can be partially turned or polished. It is to clean up the defects.

[0009] 2. Flaw detection

[0010] Flaw detection inspection must be carried out after the rough turning of the roll. Magnetic particle flaw detection and ultrasonic flaw detection are used to check whether there a...

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PUM

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Abstract

A build-up welding technology for repairing the rolling roller of section includes such steps as pre-turning, defect inspection, pre-heating, welding transition layer with flux-cored wire SN-YD1031 and flux SSF, welding working layer with flux-cored wire SN-YD285 and flux HJ107, heat treating, turning, and inspection.

Description

technical field [0001] The invention belongs to the technical field of surfacing welding, and relates to a surfacing welding repairing process for rolls of the second rolling mill of a universal production line of a steel rolling enterprise, in particular to a surfacing welding repairing process for profile rolls. Background technique [0002] Rolls are key spare parts for steel rolling enterprises. The rolls (commonly known as BD2 rolls) of the second rolling mill of Panzhihua Iron and Steel Universal Production Line are made of 60CrNiMo, and the diameter of the roll body is φ1090, φ1320, φ1340, φ1350 and other specifications according to the type of rolled steel products, and can be rolled up to 75Kg. / m, 60Kg / m, 50Kg / m, 43Kg / m heavy rail and 300*175H, 200*200H, 250*250H, 300*200H steel and other profiles, the roll body bears huge high-speed alternating rolling pressure during work, The square steel is basically formed after passing through this rolling mill. During rollin...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/095B23K9/235B23P6/00C21D9/50C21D11/00
Inventor 邹宏军杨建明杨胜东
Owner 攀枝花钢城集团有限公司协力分公司
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