High wear-resistant flux-cored wire for resurfacing welding of spiral reamer of vacuum extruder

Abstract

The invention provides a flux-cored wire for resurfacing welding of a spiral reamer of a vacuum extruder, belongs to the field of welding materials and aims at solving the problem of prolonging of the spiral reamer of the vacuum extruder. The flux-cored wire for resurfacing welding of the spiral reamer, which is provided by the invention, comprises carbon steel strip-coated metal powder and a small amount of mineral powder. The added power comprises the following substances in percentage by mass: 20-35 percent of niobium carbide, 10-15 percent of ferroboron, 2-5 percent of ferromolybdenum, 5-8 percent of ferromanganese, 2-5 percent of silicoferrite, 2-4 percent of ferrotitanium, 1-3 percent of aedelforsite, 1-3 percent of fluorite (CaF2), 2-4 percent of quartz (SiO2), 1-3 percent of zirconite (ZrO2), 1-3 percent of feldspar, 5-8 percent of natural ruffle (TiO2) and the balance of reduced iron powder. Compared with the prior art, the invention has the advantages of high hardness of a resurfacing welding layer, strong wear resistance, fewer welding slags and no need of cleaning the slags or adding protective gases during welding.

Description

technical field [0001] The invention discloses a surfacing welding flux-cored welding wire for a spiral reamer of a vacuum extruder, which belongs to the field of welding in material processing engineering. The invention is mainly used in the manufacture and repair of the surfacing welding of the spiral reamer of a vacuum extruder in the building material industry. Background technique [0002] The screw reamer is a key part in the extruder, and its performance and status have an important impact on the extrusion output and quality. When the extruder is working, the interaction between the mud and the reamer is not a purely rigid body. When the reamer pushes the mud, because the mud is a loose body, the forces in all directions push it to different directions. Mud does not move at the same speed during the flow process. It can be regarded as a laminar flow state. There is slippage between the flowing layers, forming many friction surfaces. The friction coefficient between su...

AI Technical Summary

Problems solved by technology

This not only has a series of adverse effects on the extruded mud strips, but also leads to serious wear of the spiral reamer

[0003] At present, there are two main ways to improve the service life of the spiral reamer: First, use high-chromium cast iron alloy to cast the spiral reamer. Compared with the ordinary 35 steel reamer, although the wear resistance has been improved, the service life is still short and the price is low. High quality, heavy weight, and high energy consumption; Second, the wear-resistant welding rod is used for surfacing welding on the easy-wearing surface of the reamer. Compared with the high-chromium cast iron reamer, although the price is low, it has poor wear resistance and uneven surface of the reamer. question

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