Chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent and application method thereof

Abstract

The invention provides a chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent, and belongs to the surface strengthening technology of parts such as moulds. The chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent is suitable for parts with surface abraded easily and strained easily, such as metal moulds. According to the chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent, borax serves as basic salt, a vanadium supplying agent is V205 or V-Fe alloy, a chromium supplying agent is Cr2O3 or Cr powder, a reducing agent is Al powder or Si-Ca powder, activating agent is NaF or CaF, rear earth is Ce or Ce alloy, and the chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent comprises, by weight, 65-80% of the basic salt, 5-10% of the chromium supplying agent, 5-10% of the vanadium supplying agent, 3-9% of the reducing agent, 3-9% of the activating agent, and 0.5-8% of the rear earth. Compared with a traditional vanadinizing process, under the conditions that the thickness is the same while the hardness is approximate, the coating can be prepared at lower temperature and within short time through a preparation method of the chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent, and the chrome alum rare earth multicomponent cementation borax salt bath penetration metal penetrating agent has the advantages of being high in quality of the coating, long in service life, environmentally friendly, capable of saving energy, short in production cycle and the like.

Description

technical field [0001] The invention relates to mold surface treatment technology, in particular to a co-infiltration metal surface strengthening technology. Background technique [0002] Mold surface treatment technology is one of the key processes in mold manufacturing, directly related to mold manufacturing precision, mechanical properties (such as strength, etc.), service life and manufacturing cost, and is an important link to ensure mold quality and service life. Among them, TD (Toyota Diffusion Coating Process or Thermal Diffusion) treatment technology has attracted the attention of countries all over the world because of its simple equipment structure, convenient operation, low production cost, and excellent performance of the formed carbides. [0003] Most of the current TD carbide coating technologies are limited to a single element coating, and there are always some problems in practical applications. For example, the most widely used vanadium carbide coating has ...

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Problems solved by technology

[0003] Most of the current TD carbide coating technologies are limited to a single element coating, and there are always some problems in practical applications. For example, the most widely used vanadium carbide coating has the following problems: the heat treatment temperature is relatively high, usually 900 ~ 1050 ° C ; The heat treatment time is long, and it usually takes 8 to 16 hours to obtain a coating of 6-15 μm; the coating is relatively brittle, and it is easy to peel off during use; oxidation or decomposition will occur at high temperatures above 500 ° C

[0005] However, the co-penetration agent used in the current TD method chromium vanadium co-infiltration process is borax base salt, Cr 2 o 3 Or Cr powder chromium agent, V 2 o 5 Or V-Fe alloy vanadium donor, Al powder or Si-Ca powder, NaF or CaF, etc., the corrosion resistance of the coating is improved compared with the single vanadium layer, but its hardness is still low, and the corrosion resistance Poor abrasiveness, higher temperature or longer time required for the same thickness of coating

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