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Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof

A technology of carburizing agent and liquid salt, which is applied in the fields of pharmaceutical formulations, cosmetic preparations, dressing preparations, etc., can solve the problem of no carburizing agent, etc., and achieves a simple and practical preparation method, diverse sources, and is conducive to popularization and application Effect

Inactive Publication Date: 2008-05-28
刘文彬
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AI Technical Summary

Problems solved by technology

In order to meet the needs of modern technology development, people have been actively researching new carburizing agents, but so far, no carburizing agent that can be used on various metal materials has been found.

Method used

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Embodiment Construction

[0015] A liquid salt bath carburizing agent, its main components and content are: fixed carbon ≥ 85%, ash ≤ 4%, moisture ≤ 8%, sulfate ≤ 0.05%.

[0016] The salt bath formula used for the above carburizing agent, its main components and their proportions are: sodium chloride NaCl40-50%, potassium chloride KCl30-40%, sodium carbonate NaCl 2 CO 3 10-20%, carburizing agent additive 5-10%.

[0017] The compound method of above-mentioned salt bath prescription is divided into following several steps:

[0018] 1. First put the base salt into the crucible to melt (the purity of the base salt is ≥98.5%), raise the temperature to 900°C±10°C, then add the above-mentioned liquid carburizing agent in batches, and then raise the temperature to 930°C±10°C.

[0019] 2. Test infiltration with a steel rod for 10 minutes, and then directly quench until the hardness reaches above HRA79. If the hardness is not enough, it means that the salt bath has not reached the normal carburizing state, an...

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Abstract

The invention relates to a liquid salt bath carburizing agent, a bath salt formula and a preparation method thereof. The main components and the content of the liquid salt bath carburizing agent comprises fixed carbon of not less than 85 percent, ash content of not more than 4 percent, water of not more than 8 percent and sulphate of not more than 0.05 percent. The main components and the proportion of the bath salt formula of the carburizing agent comprises NaCl of 40-50 percent, KCl of 30-40 percent, Na2CO3 of 10-20 percent, additive of carburizing agent of 5-10 percent. The preparation method of the bath salt mainly comprises the processes of subsalt smelting, temperature rising, adding the liquid carburizing agent and heating up and quenching, etc. The liquid salt bath carburizing agent of the invention is characterized by low cost and non-toxin of the carburizing agent and is applicable for metal materials of various properties; the bath salt formula of the carburizing agent has diversified material sources, low cost, simple and practicable preparation method , easy operation and is beneficial to popularizing and applying.

Description

technical field [0001] The invention relates to a carburizing agent, in particular to a salt bath carburizing agent, a salt bath formula and a preparation method, and belongs to the technical field of chemical heat treatment. Background technique [0002] Chemical heat treatment is a metal heat treatment that changes the chemical composition, structure and properties of the surface of metal and alloy workpieces. Chemical heat treatment mainly includes carburizing, nitriding and carbonitriding, among which carburizing is one of the oldest and most commonly used process methods. Carburizing is a surface modification technology that changes the chemical composition and structure of the surface of austenitic steel workpieces through the infiltration of carbon or carbon and nitrogen. The quality of carburized workpieces is directly related to the quality and service life of mechanical products. The low carbon concentration on the surface of carburized parts will reduce the fati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/23A61Q19/10
Inventor 刘文彬
Owner 刘文彬
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