A kind of fiber toughened tungsten carbide welding rod

Abstract

The invention discloses a fiber-toughened tungsten carbide electrode. The raw materials for preparing the electrode include the following components in mass percentage: 2-4wt% toughening fiber, 60-70wt% tungsten carbide particles, 24-34wt% nickel-chromium base Alloy powder, 2~4wt% binder, said binder includes the following components in mass percentage: 5~15wt% PMMA, 85~95wt% acetone, and its manufacturing method includes using organic fiber or silicon carbide fiber butt electrode Toughening, so that it is not easy to break and break during use, the toughening fiber is added to the powder composed of tungsten carbide particles and nickel-chromium-based alloy powder used in the electrode matrix, and then the binder is added to mix evenly, and squeezed out by a pressure coating machine After being cut into a single electrode or curled into a disc, a high-strength and high-toughness tungsten carbide electrode can be obtained after drying. The tungsten carbide electrode of the present invention uses toughening fibers to have a good toughening effect on the electrode; less binder is used , low residual carbon content, so that the finished electrode products can be rolled into disks for use, and the process is simple and the cost is low.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a fiber-toughened tungsten carbide welding rod. Background technique [0002] The traditional tungsten carbide surfacing electrode matrix is ​​composed of tungsten carbide particles, nickel-chromium-based alloy powder and a small amount of binder. The tungsten carbide particles and nickel-chromium-based alloy powder are bonded into a whole through the adhesion of the binder. There is a large difference in particle size from nickel-chromium-based alloy powder, and the binding ability between tungsten carbide particles and binder is low, so the electrode toughness is poor, and it can only be processed into short electrodes for use, and cannot be rolled into disks. It is also easy to break and affect the use. In order to roll the tungsten carbide electrode into a disc, some products add a metal core to it, so that the electrode can maintain the overall shape even if it is bent and b...

AI Technical Summary

Problems solved by technology

[0002] The traditional tungsten carbide surfacing electrode matrix is ​​composed of tungsten carbide particles, nickel-chromium-based alloy powder and a small amount of binder. The tungsten carbide particles and nickel-chromium-based alloy powder are bonded into a whole through the adhesion of the binder. There is a large difference in particle size from nickel-chromium-based alloy powder, and the binding ability between tungsten carbide particles and binder is low, so the electrode toughness is poor, and it can only be processed into short electrodes for use, and cannot be rolled into disks. It is also easy to break and affect the use. In order to roll the tungsten carbide electrode into a disc, some products add a metal core to it, so that the electrode can maintain the overall shape even if it is bent and broken, which does not affect the use, but its processing cost also increases.

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