Metal material containing vanadium carbide coating as well as preparation method and application thereof

Abstract

The invention provides a metal material containing a vanadium carbide coating which comprises a base metal, a vanadium carbide coating and a boronizing layer located between the base metal and the vanadium carbide coating, wherein the vanadium carbide coating has the thickness of 5-15 [mu]m, the boronizing layer is single-phase iron boride, the boronizing layer has the thickness of 30-200 [mu]m, and the base metal is steel with the carbon content being 0.3% or more than 0.3%. The invention further provides a preparation method of the metal material containing the vanadium carbide coating. Thesurface hardened layer of an alloy prepared with the method provided by the invention has an outmost surface layer being the vanadium carbide coating which is extremely high in tensile strength and high in wear resistance, a subsurface hardened layer is relatively thick and the hardness of the subsurface hardened layer is much higher than that of a base material; the surface hardened layer structure enables the outermost surface layer of the vanadium carbide coating to withstand greater compressive stress without being damaged or peeled off, thereby exerting the performance characteristics ofthe vanadium carbide coating, effectively solving the problem of surface strain of heavy load pull-down deep forming molds or mechanical parts, and greatly prolonging the service life of the heavy load pull-down deep forming molds or the mechanical parts.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a metal material containing a vanadium carbide coating and a preparation method and application thereof. Background technique [0002] When steel materials are drawn, bent, flanged and rolled, it is easy for the mold to scratch the surface of the workpiece. There are many ways to solve this problem, such as changing the mold material, using hard alloy, and using beryllium copper alloy as the mold ; Add suitable drawing oil or plastic film between the mold and the forming sheet; or carry out phosphating treatment on the forming sheet; carry out surface treatment on the mold. The above methods are applied in different occasions, especially the surface treatment of the mold is economical and effective. [0003] Chemical heat treatment of steel parts is an effective method to greatly improve their properties such as wear resistance, corrosion resistance and fatig...

AI Technical Summary

Problems solved by technology

However, in the ever-increasing number of occasions where the use conditions are more severe, such as the high-strength steel plates with increasingly higher sheet strength in the automotive industry and the forming dies of high-strength thick sheets in the heavy-duty truck industry, the TD method is used for vanadium carbide coating treatment. Unable to achieve a satisfactory use effect, the specific performance is that the vanadium carbide coating is easy to peel off when it is used for less than 2000 strokes, and some even only a few tens of strokes, and the carbide coating cannot exert the tensile and high wear resistance. Advantage

Deep drawing mold materials are generally made of high-chromium cold-working die steel. The hardness after heat treatment is generally only about HRC60, which is difficult to further improve. If high-speed steel with higher hardness is used, although the hardness can be increased to HRC63-67, However, the mold manufacturing cost and manufacturing difficulty will increase significantly