Preparation method of ternary boride hard alloy surfacing welding rod

Abstract

The invention discloses a preparation method of a ternary boride hard alloy surfacing welding rod, and belongs to the technical field of welding rods. The method comprises the steps: S1, treating raw materials; S2, preparing an adhesive; S3, mixing the materials; S4, preparing; and S5, sintering. According to the method, a wax-based binder with a low melting point and good fluidity is selected, different alloy element mass fractions are selected from ternary boride raw material alloy powder to control the final sintering temperature, the target sintering temperature is reached through degreasing and sintering integration and a multi-section heating program, the heating rate and the heat preservation time are controlled, defects of deformation, cracks and the like of a welding rod blank in the heating and sintering process can be effectively avoided, the diameter and the length of the ternary boride hard alloy surfacing welding rod can be flexibly adjusted, the ternary boride surfacing welding rod prepared through the method is uniform in structure and component, a prepared coating is excellent in performance, the base metal dilution rate is low, the coating quality is stable, the preparation cost is low, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of welding rods, and in particular relates to a preparation method of a ternary boride hard alloy surfacing welding rod. Background technique [0002] With the continuous development of industry, higher requirements are put forward for the long-term effective and stable work of mechanical parts. It manifests itself as surface failure, that is, material surface wear and corrosion. Therefore, effectively improving the wear resistance and corrosion resistance of parts has become a hot spot. At present, the cladding technologies to improve the surface properties of materials mainly include brazing technology, induction cladding, laser cladding, plasma cladding, thermal spraying technology and stacking technology. Welding, etc., in which cladding materials and processes are the key to affect production efficiency, cost and cladding quality and performance. [0003] Among many materials for improving the service...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the flux-cored wire is affected by the rapid heating and rapid cooling characteristics of the surface modification process, resulting in insufficient formation time of the ternary boride hard phase, failing to achieve the expected effect, and lacking the need for large-scale production , and proposed a preparation method of a ternary boride hard alloy surfacing electrode, and the sintered electrode can make up for the defects of less content and uneven distribution of the ternary boride hard phase of the flux-cored wire, and utilize the electrode forming and sintering principle The integrated process of bit-generated ternary borides improves production efficiency, and has the advantages of strong bonding between the cladding and the steel substrate, high cladding stability, simple manufacturing equipment, and short production cycles.

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