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Rare earth carburizing process using rolling furnace to treat screws

A screw and carburizing technology, applied in the field of metal surface carburizing treatment, can solve the problems of high equipment maintenance rate, long process time, low productivity, etc., and achieve the effect of reducing equipment maintenance rate, simple operation and improving productivity

Inactive Publication Date: 2012-09-05
蚌埠市钰诚五金工贸有限公司
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AI Technical Summary

Problems solved by technology

The traditional process has long process time, high temperature, low productivity, and high equipment maintenance rate have become headaches in the industry

Method used

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  • Rare earth carburizing process using rolling furnace to treat screws

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Embodiment Construction

[0015] The rare earth carburizing process of screws is treated with a rolling furnace, which specifically includes the following steps:

[0016] (1) Configuration contains 0.2g / L cerium chloride, 0.3 / L lanthanum chloride aqueous solution, above-mentioned solution is stirred into refractory soil, is kneaded to ball, control contains 0.02g cerium chloride, 0.02g cerium chloride, 0.03 g of lanthanum chloride;

[0017] (2) Remove the oil on the surface of the screw;

[0018] (3) Put the screws into the rolling furnace, add 40-50 kg of screws for every 40-50 kg of screws, put in 2-3 refractory soil pellets equivalent to 100 grams, and under the protection of nitrogen, feed the carbon generated by the combustion of liquefied gas into the screws Inside, the temperature in the furnace is required to be 840-860 ° C, and the temperature is kept for 80 minutes;

[0019] (4) After the heat preservation in step (3), pour the screws in the rolling furnace into cold water, take them out of...

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Abstract

The invention relates to a rare earth carburizing process which adopts refractory mortar as a penetration enhancing carrier, and uses a rolling furnace to treat screws. The rare earth carburizing process comprises the following steps: at first, preparing rare earth fire-resistant balls; adding the degreased screws and the fire-resistant balls into the hearth of a high-temperature rolling furnace according to a certain proportion; carrying out heat-preservation carburizing processing for certain time, taking and cooling the degreased screws and the fire-resistant balls, and carrying out anti-rust treatment. The rare earth carburizing process reduces the carburizing temperature, shortens the carburizing time, and simultaneously, improves the product property and the production efficiency, reduces the equipment maintenance rate, and saves the production cost.

Description

technical field [0001] The invention relates to the field of metal surface carburizing treatment, in particular to a rare earth carburizing process for treating screws with a rolling furnace. Background technique [0002] The carburizing process is a very old process. In China, it can be traced back to 2000 years ago. At first, it was carburized with solid carburizing medium. In the 20th century, liquid and gas carburizing appeared and were widely used. Later, vacuum carburizing and ion carburizing appeared. Up to now, the carburizing process still has very important practical value, because of its reasonable design idea, that is, where the surface of the steel receives the most loads (wear, fatigue, mechanical load and chemical corrosion), through infiltration of carbon and other elements to achieve high surface hardness, high wear resistance, fatigue strength and corrosion resistance, without having to process the entire material through expensive alloying or other comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/22
Inventor 丁宁丁甸吴旭东刘传让徐大力
Owner 蚌埠市钰诚五金工贸有限公司
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