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Boronizing agent and method of use thereof

A technology of boronizing agent and iron boron, which is applied in the field of solid powder boronizing agent, can solve problems such as the deformation of the infiltrated layer, achieve the effect of appropriate thickness, obvious economic effect, and reduce the deformation of the workpiece

Inactive Publication Date: 2008-03-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-temperature solid boronizing agent and its application process, which can solve the problem that the boronizing temperature is too high and the carburizing layer is deformed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Penetration agent composition: 20% B-Fe, 8% KBF 4 , 8% (NH 2 ) 2 CO, 8% charcoal, 7% light rare earth oxides, balance SiC.

[0028] Treatment process: heat preservation at 570°C for 2 hours, and heat preservation at 680°C for 6 hours to obtain a boronizing layer of 65 μm.

Embodiment 2

[0030] Penetration agent composition: 20% B-Fe, 10% KBF 4 , 10% (NH 2 ) 2 CO, 8% charcoal, 1% cerium chloride, balance SiC.

[0031] Treatment process: heat preservation at 570°C for 2 hours, heat preservation at 680°C for 6 hours, and obtain a boronizing layer of 70 μm.

Embodiment 3

[0033] Penetration agent composition: 20% B-Fe, 10% KBF 4 , 8% (NH 2 ) 2 CO, 15% charcoal, 12% light rare earth oxides, balance SiC.

[0034] Treatment process: heat preservation at 600°C for 2 hours, and heat preservation at 680°C for 6 hours to obtain a boronizing layer of 45 μm.

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PUM

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Abstract

The present invention relates to one kind of low temperature solid boriding agent and its usage. The solid boriding agent consists of ferroboron 5-50 wt%, urea 3-30 wt%, RE compound 1-20 wt%, KBF4 5-40 wt%, charcoal 5-20 %, and silicon carbide for the rest. The RE compound is compound of La, Ce, Tb or Yt. When the low temperature solid boriding agent is used, is adopted a two-section heating process including the first heating to 500-600 deg.c and maintaining for 1-5 hr, the subsequent heating to 630-750 deg.c and maintaining for 2-8 hr and cooling in the furnace to obtain borided layer. The present invention has low boriding temperature, less deformation in the borided layer, improved borided layer performance and simplified process.

Description

technical field [0001] The process of solid boronizing is to mix the boronizing agent evenly, bury the workpiece to be treated in the infiltrating agent powder, and seal it into a heat treatment furnace for heat treatment. During the heat treatment process, a chemical reaction occurs to form a boronizing layer that is bonded to the surface of the workpiece to improve the anti-corrosion and wear-resistant properties of the workpiece. The invention relates to a solid powder boronizing agent and a using method thereof, which are used for thermochemical treatment of workpiece boronizing under relatively low temperature conditions. Background technique [0002] The boronizing process has been developed for more than 100 years. The industry has created and invented various boronizing methods and processes, such as solid powder boronizing, gas boronizing, paste boronizing, and salt bath boronizing, among which solid boronizing has The process is convenient to operate, the equipmen...

Claims

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Application Information

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IPC IPC(8): C23C8/68
Inventor 马刘宝
Owner BAOSHAN IRON & STEEL CO LTD
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