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Surface low-temperature boriding process for hot-work die steel

A technology of hot work die steel and process method, which is applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of large environmental impact, low boronizing speed, large deformation of workpiece, etc.

Inactive Publication Date: 2009-05-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of conventional boronizing temperature, large workpiece deformation, and low boronizing speed, and overcome the disadvantages of the above-mentioned low-temperature boronizing patent that poisonous gas needs to be introduced and has a great impact on the environment , to provide a low-temperature boronizing process suitable for industrial applications, with good controllability of boronizing parts and boronizing speed, so that the whole or part of the die steel has better high temperature strength and impact toughness , thermal cracking resistance and wear resistance

Method used

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Embodiment Construction

[0017] The low-temperature boriding process steps of the embodiment of the present invention are as follows:

[0018] 1. First, before boronizing, the surface of the H13 steel sample is nano-treated using a surface grinder. In this embodiment, the existing SNC-1 metal surface nanometerization testing machine is adopted. This machine is equipped with a cooling water circulation device. A container is arranged in the machine, and a piece of low-carbon metal surface prepared for nanometerization treatment is fixed on the container cover. steel sample; the container is equipped with small steel balls for nano shot blasting, the diameter of the small steel balls is 6mm, and there are 250 in total; the container cover is closed and sealed, and vacuumized; then the motor is started to drive the testing machine to rotate at a high speed, and Vibration generators are used to make the nano-sized shot-peening small steel balls move violently to perform nano-processing on the metal surfac...

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Abstract

The invention discloses a low-temperature boronizing method of heat mould steel surface, which comprises the following steps: a. proceeding nanometer disposal for steel mould surface; b. removing dirt on the surface of steel sample; c. boronizing in the vacuum; d. cooling to indoor temperature; coating boronizing agent with thickness at 2-5mm; drying.

Description

technical field [0001] The invention relates to a low-temperature boronizing treatment process on the surface of hot work die steel, which can improve the hardness, wear resistance, thermal hardness, corrosion resistance, oxidation resistance and thermal fatigue resistance of the hot work die steel surface, greatly Improve its service life, especially high-temperature service life, and expand the application field of hot work die steel. Background technique [0002] Hot work die steel is widely used in hot forging dies, hot extrusion dies and die-casting dies. The working conditions of these molds are very harsh, so they need to have good high temperature strength, impact toughness, thermal fatigue resistance and wear resistance. [0003] The boronizing layer is a promising chemical heat treatment process due to its high hardness, wear resistance, thermal hardness, corrosion resistance and oxidation resistance. At present, the boronizing methods used in production are stil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/68
Inventor 胡心彬周小平李四年李厚祥
Owner HUBEI UNIV OF TECH
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