Deep rare-earth boron carbonitriding agent

Abstract

The invention discloses the deep level rare earth boron-carbo-nitriding agent, comprising the following characters: 3-12 parts boron carbide, 2-9 parts potassium borofluoride, 2-9 parts rare earth chloride, 1-10 parts charcoal powder, 1-4 parts activated char, 1-4 parts fluorigard, 1-4 parts aquadrate and 48-89 parts carbofrax. The method comprises the following steps: adding rare earth chloride into agent to improve layer depth to 0.20-0.80mm; carrying out carbonitriding, improving the hard of buffer layer and width, reducing the hardness gradient, and avoiding boronization layer exfoliation; the rare earth entering into boronization layer, improving the boronization layer structure and property.

Description

technical field [0001] The invention relates to a chemical heat treatment infiltrating agent, in particular to a deep layer rare earth borocarbonitriding infiltrating agent. Background technique [0002] Chemical heat treatment penetration agent is mainly used for the protection of metal materials and parts during chemical heat treatment. When it is necessary to deal with some workpieces that require high hardness, can withstand impact, and allow a large amount of wear, such as grain machine pressure rollers, refractory brick molds, and oil drill bits , aluminum alloy extrusion dies, plastic molds, etc., the use of existing infiltration agents can not meet the requirements of the workpiece, because the boronizing layer is generally only 0.08-0.13mm after heat treatment using the existing infiltration agent, and the depth of the infiltration layer It is relatively shallow, which leads to short service life of the workpiece and fails to meet the design requirements; moreover, ...

AI Technical Summary

Problems solved by technology

[0002] Chemical heat treatment penetration agent is mainly used for the protection of metal materials and parts during chemical heat treatment. When it is necessary to deal with some workpieces that require high hardness, can withstand impact, and allow a large amount of wear, such as grain machine pressure rollers, refractory brick molds, and oil drill bits , aluminum alloy extrusion dies, plastic molds, etc., the use of existing infiltration agents can not meet the requirements of the workpiece, because the boronizing layer is generally only 0.08-0.13mm after heat treatment using the existing infiltration agent, and the depth of the infiltration layer It is relatively shallow, resulting in a short service life of the workpiece and failing to meet the design requirements; moreover, the hardness gradient of the infiltrated layer is relatively steep, which is prone to peeling off, and the structure and performance of the entire infiltrated layer need to be further improved