Argon arc cladding iron-based powder

Abstract

The invention relates to argon arc cladding iron-based powder, which belongs to the technical field of material surfaces. The powder is characterized by consisting of the following raw materials in percentage by weight: 40 to 60 percent of ferrotitanium with 25.0 to 35.0 percent of Ti, 10 to 25 percent of ferrovanadium with more than 75 mass percent of V, 15 to 30 percent of ferrochromium with more than 70 mass percent of Cr, 0 to 5 percent of ferroboron with more than 15 mass percent of B and 5 to 15 percent of graphite with less than 0.1 mass percent of C, wherein the particle sizes of the raw materials such as the ferrotitanium, ferrovanadium, ferroboron, ferrochromium, graphite and the like are 40 to 200 meshes. The powder is uniformly mixed with water glass or an organic binder and is precoated on the surface (the thickness is between 0.5 and 1.5mm) of a workpiece or is prepared into a bar with the diameter of phi2 to 4mm; after being dried, a powder precoating or the bar is clad on the surface of the workpiece by using the argon arc as a heat source so as to form a wear-resisting cladding layer; a tungsten electrode is a 2-percent thorium-tungsten electrode with the diameter of phi3 to 4mm and is used as a positive electrode with direct current; the flow rate of argon gas is 8 to 12L / min; the current is 120 to 160A; and the arc voltage is 15 to 20V. The cladding powder has low cost and the hardness of the cladding layer is up to HRC 55 to 63.

Description

Technical field: [0001] The invention belongs to the technical field of material surfaces and provides an iron-based powder for argon arc surface cladding and an argon arc cladding process thereof. Background technique [0002] With the development of modern industry, the performance requirements of mechanical products are getting higher and higher in the production process. The long-term stable operation of products under high parameters (such as high temperature, high pressure, high speed, etc.) Higher requirements are put forward for strength, wear resistance and corrosion resistance. All kinds of mechanical equipment, instruments and meters, metal parts in metallurgical parts, and various tools and molds are often damaged and invalidated from the surface during use. A large part of the reason for the damage is caused by surface wear. Therefore, as long as the surface of the part is strengthened, the performance requirements can be met. [0003] The surface strengthenin...

AI Technical Summary

Problems solved by technology

Commonly used high-density heat sources for surface cladding include lasers, plasma arcs, focused beams, etc., which are characterized by high energy density and good quality of the strengthened surface, but the equipment is expensive and the operation is complicated