Method for rapidly repairing abraded groove in chute middle plate

Abstract

The invention discloses a method for rapidly repairing an abraded groove in a chute middle plate. The method comprises the steps that firstly, an aluminum pipe is selected according to the depth and width of the groove, is filled with ferric oxide powder and then pressed to be shaped like a flat pipe, and the aluminum flat pipe is put into the groove; according to the depth of the groove, the upper portion of the flat pipe is covered with a coarse-particle iron alloy powder covering layer which exceeds the surface of the groove by the height of 1-2 mm and covers the whole groove in width, or covered with a pasty covering layer formed by mixing 80wt% of fine iron alloy powder and 20wt% of clay; and after drying, a plasma arc is used for scanning and forwards moving simultaneously on the upper portion of the covering layer at one end of the groove for bead-weld repairing of the groove, and a slag shell on the surface of a bead-weld layer is knocked off after bead weld is completed. According to the method for rapidly repairing the abraded groove in the chute middle plate, iron rust in the abraded groove does not need to be removed, and after filling of the aluminum pipe and the ironalloy powder, the plasma arc is subjected to bead weld to the required thickness at a time according to a program; and the efficiency is high, the bead-weld repairing layer contains abrasion-resistantalloy elements, abrasion resistance is high, and the surface is flat.

Description

technical field [0001] The invention belongs to the technical field of plasma surfacing welding on the surface of iron and steel parts, in particular to a method for rapidly repairing plate wear grooves in a chute by plasma surfacing welding. Background technique [0002] Underground mechanized coal mining in coal mines generally uses a scraper conveyor to transport coal to the roadway belt conveyor. The chain drives the scraper to scrape away the coal rock. Because the hardness of the chain is greater than that of the middle plate of the chute, the chain will wear out a deep groove on the middle plate after running for a long time, and the maximum depth of the groove can reach about 5-8mm, which greatly affects the service life of the chute. At present, for the middle plate of the chute that has worn to a certain extent, the method of overlay welding with electrodes is basically used to fill up the wear groove. Before surfacing welding, the rust at the bottom of the groove...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the existing method of using welding rod surfacing welding to remove rust and repair the wear groove of the plate in the chute, the surfacing welding smoke is large, the deformation is large, the internal and external quality is poor, the labor intensity is high, and the efficiency is low. The present invention proposes a plasma surfacing welding Method for fast repairing the worn groove of the plate in the chute