Fiber toughening tungsten carbide welding rod

Abstract

The invention discloses a fiber toughening tungsten carbide welding rod. Raw materials for preparing the welding rod comprise the following components of 2wt%-4wt% of toughening fibers, 60wt%-70wt% oftungsten carbide particles, 24wt%-34wt% of nickel-chromium-based alloy powder, 2wt%-4wt% of binder, and the binder comprises the following components of 5wt%-15wt % PMMA and 85wt%-95wt% of acetone. Amanufacturing method of the fiber toughening tungsten carbide welding rod comprises the steps that organic fibers or silicon carbide fibers are adopted for toughening the welding rod, thus the welding rod is not liable to be broken and fractured in the use process, the toughening fibers are added into powder composed of the tungsten carbide particles and the nickel-chromium-based alloy powder used for a welding rod substrate, then the binder is added, the components are mixed evenly, extrusion molding is conducted through a pressure coating machine, one single welding rod is obtained throughcut-off operation, or a reel is obtained through winding, and the high-strength high-toughness tungsten carbide welding rod is obtained after drying. The toughening fibers are adopted for achieving agood toughening effect on the tungsten carbide welding rod, little binder is used, the carbon residual amount is low, thus the manufactured welding rod product can be wound into the reel to be used, the technology is simple, and 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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