Solid powder multi-element composite infiltration agent and composite infiltration process

Abstract

The invention relates to a solid powder multi-element composite infiltration agent and a composite infiltration process, and belongs to the technical field of metal surface treatment. The composite infiltration agent is composed of a chromium source, a vanadium source, a boron source, nickel powder, an activating agent, a filling agent, an oxygen scavenger and a rare-earth infiltration enhancer. The composite infiltration agent has the effects of rapid infiltration speed, no pollution, improving the structural density of an infiltration layer, and avoiding the embrittlement of the infiltrationlayer. The composite infiltration process comprises the following steps of carrying out acid pickling activation pretreatment on a base body material, then burying the base body material into the composite infiltration agent, heating and preserving heat in a carbon-containing or nitrogen-containing atmosphere, and then carrying out quenching treatment after furnace cooling. According to the process, the method is simple, no pollution occurs, the infiltration speed is rapid, the infiltration agent is free of hardening, and the surface of an infiltrated workpiece is clean. The prepared composite infiltration layer is fine in the crystalline grains and compact in the structure, has a good gradient structure, has the toughness, the wear resistance, the corrosion resistance, the high-temperature oxidation resistance and the like, and can be applied to parts such as a tool, a mold, a bearing, and a gear.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, and in particular to a solid powder multi-component composite infiltration agent and a composite infiltration process. Background technique [0002] The solid infiltration process is simple, the process is short, and a uniform infiltration layer structure can be obtained for the surface of the workpiece with complex shapes. The infiltration layer prepared by the solid infiltration method has the advantages of wear resistance, corrosion resistance, and oxidation resistance. Therefore, the solid infiltration technology is widely used in the industry. is widely used. [0003] Commonly used solid infiltration mainly includes boronizing, chromizing, vanadiuming, etc., and they all have their own advantages and disadvantages. Poor, and the boronizing layer is prone to coarse FeB phase, resulting in high brittleness of the boronizing layer and easy peeling off. The surface oxidation re...

AI Technical Summary

Problems solved by technology

Although this compound infiltration has improved the performance of the infiltration layer to a certain extent, there are still some problems in these compound infiltration, such as co-infiltration of boron chromium and boron vanadium. Although the structure of the infiltration layer has been improved to a certain extent, the formation of coarse FeB cannot be avoided. Exist; although the chrome-vanadium co-infiltration has compact structure and high performance, it still has the disadvantage of slow infiltration rate