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Metal ceramic surface treating method
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A surface treatment, cermet technology, applied in the field of ceramics, to achieve the effect of easy operation and improved performance
Inactive Publication Date: 2015-04-08
ZHOUSHAN MAOXIANG CEMENTED CARBIDE
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Problems solved by technology
[0008] Although the above-mentioned patents have proposed some methods of ceramic carburizing, through careful analysis, it is found that there are still some deficiencies; mainly in the effect and uniformity of carburizing Not very ideal, and the carburizing process is more complicated, especially how to carburize the surface of cermets, and further improvement is still needed to improve the surface strength
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Embodiment 1
[0026] A method for surface treatment of cermets, the ceramic green body is placed in a vacuum container filled with carbon source gas, at a temperature greater than or equal to the ceramic sintering temperature, the vacuum degree is 9 -2 -10 -2 Under the condition of MPa, carburizing treatment is carried out, and the ceramic product is taken out after 2-4 hours of heat preservation, and the carburizing is completed.
[0027] Further, the carbon source is a 9999.9% high-purity carbon source; it can be formed by mixing methanesulfonic gas and carbon fiber cotton;
[0028] Further, the carbon source gas concentration is that the carbon source accounts for 40-60% of the volume of the gas;
[0029] Further, the sintering temperature greater than or equal to the ceramic is 1400-1600°C;
[0030] Further, the carbon source gas flows in a closed manner in the vacuum container, and is circulated in the vacuum furnace through the circulation pipe while being fed in and out.
[0031] ...
Embodiment 2
[0042] A method for surface treatment of cermets, the ceramic green body is placed in a vacuum container filled with carbon source gas, at a temperature greater than or equal to the ceramic sintering temperature, the vacuum degree is 9 -2 -9.5 -2 Under the condition of MPa, carburizing treatment is carried out, and the ceramic product is taken out after 3 hours of heat preservation, and the carburizing is completed.
[0043] Further, the carbon source is a 9999.9% high-purity carbon source; it can be formed by mixing methanesulfonic gas and carbon fiber cotton;
[0044] Further, the carbon source gas concentration is that the carbon source accounts for 50-60% of the volume of the gas;
[0045] Further, the sintering temperature greater than or equal to the ceramic is 1500-1600°C;
[0046] Further, the carbon source gas is flowing in the vacuum container, and the gas is fed in and out through the circulation pipe, and circulates in the vacuum furnace.
[0047] According to t...
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Abstract
The invention discloses a metalceramic surface treating method. The metalceramic surface treating method is characterized by comprising the following steps: putting a ceramicgreen body into a vacuum container which is filled up with a carbon source gas, performing carburizing treatment at a temperature higher than or equal to the ceramic sintering temperature under vacuum degree of 9<-2>-10<-2>MPa, and taking out a ceramic product after preserving the heat for 2-4 hours, thereby ending the carburizing treatment. The metal ceramic surface treating method has the advantage that a carbon source is infiltrated into the ceramic green body under a vacuum state that the temperature of the high-purity carbon source is higher than the ceramic sintering temperature, the carburizing effect is superior to a common carburizing effect, and the operation is simple and convenient.
Description
technical field [0001] The present invention relates to a method for improving the properties of cermets, in particular to a method for improving certain aspects of properties of cermets by using carburizing technology, which belongs to the field of ceramic technology, and is especially suitable for improving the properties of carbide-based cermets. Background technique: [0002] Cermets are structural materials composed of a ceramic hard phase and a metal or alloy binder phase. Because cermets not only maintain the high strength, high hardness, wear resistance, high temperature resistance, oxidation resistance and chemical stability of ceramics, but also have good metal toughness and plasticity, so now more and more places where cermets are applied many. However, in the use of cermets, it is found that the performance of the surface is still not very good, especially the lack of metal bonding phase on the surface of cermets will easily lead to a decrease in the wear resis...
Claims
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