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Quick preparation method of metal surface boronizing layer

A metal surface, boronizing layer technology, applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problems of chemical heat treatment surface infiltration layer preparation, etc., to shorten the preparation time, overcome the high temperature , the effect of broad application value

Inactive Publication Date: 2007-01-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After reviewing the literature, no relevant reports have been found on the use of microwave energy for chemical heat treatment and the preparation of surface infiltration layers.

Method used

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  • Quick preparation method of metal surface boronizing layer
  • Quick preparation method of metal surface boronizing layer
  • Quick preparation method of metal surface boronizing layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The quality is 50% borax + 10% SiC + 10% KCl + 20% Na 2 AlFe 6 +5%B 4 C+5%Cr 2 o 3 Composition of Paste Boronizing Agent Wraps 35 # Put the carbon steel in a ceramic crucible with a diameter of 50mm and put it into the heating chamber of a microwave oven at a temperature of 850°C, heat and keep it for 1 hour to obtain a boronizing layer with a thickness of 30μm, and the structure is complete and compact. X-ray analysis shows that the boronizing layer is Fe 2 B, FeB duplex structure.

Embodiment 2

[0026] Adopt the same pasty boronizing agent of embodiment 1 to wrap 25 # Carbon steel is placed in a ceramic crucible with a diameter of 50mm and put into a microwave oven heating chamber at a temperature of 850°C, and heated for 0.5 hours to obtain a boronizing layer with a thickness of about 10μm.

Embodiment 3

[0028] With a mass of 40% B 4 C+50%CaF 2 +10%Na 2 SiF 6 The composed boronizing agent is uniformly prepared and made into a paste with rosin 30% + alcohol 70% alcohol, and evenly coated on the workpiece that has been degreased and derusted. The coating thickness is greater than 2mm, and put into a ceramic crucible Place it in a microwave heating chamber and keep it warm at 700-950°C for 0.5-1.5 hours to obtain a boronizing layer.

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Abstract

The invention provides a kind of superficial boronization level the fast preparation method. The method fast and the choice heats up and the acceleration chemical reaction characteristic using the microwave, in compares the low temperature and the short time intrinsic steel and iron and the metal surface preparation boronization level, it heating temperature may heat up compared to the electric stove reduces 100 DEG C about, heats up the time to reduce above three times, also the preparation boronization the level structure integrity, unifies with the substrate, the degree of hardness is high. The method broke through the traditional heat treatment to be unable in the low temperature, the short time obtained good infiltrates the level the limitation, had the significant industrial application value.

Description

technical background [0001] The invention relates to a method for surface chemical heat treatment and microwave treatment, in particular to a rapid preparation method for a boronizing layer on a metal surface. Background technique [0002] The preparation of metal material surface penetration layer has always been the most important means and method to expand the application range of materials and improve the corrosion resistance, wear resistance, heat resistance and other properties of materials, and has been widely used in industrialization, such as in molds, wearable parts and resistant Surface boronizing of parts used in corrosive environments. Therefore, the surface boronizing treatment of metal materials is a very effective material surface modification and protection method. The traditional method of boronizing the surface of metal materials is to place the metal material or the workpiece in the boronizing medium and keep it warm at high temperature for several hours...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/42C23C8/68
Inventor 章桥新周健王玉伏张建红
Owner WUHAN UNIV OF TECH
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