Continuous high-temperature nitriding furnace

Abstract

The invention provides a continuous high-temperature nitriding furnace. A thermal insulation material and a fireproof lining, which are made of different materials and of different thicknesses, are constructed in a furnace shell of the continuous high-temperature nitriding furnace in a segmentation mode respectively. A slide way or a rotating roller or a moving object is installed in a reserved strip cavity tunnel to push a slide way pushing plate to move or to push a roller bottom type pushing plate to move or a roller bottom to rotate and move. A gap among the fireproof lining, a sagger and a target object to be burnt is longitudinally divided into two or more belts, a heating element is installed in a gap of a part of the belts, and the other part is a free space. According to the continuous high-temperature nitriding furnace, ceramic products containing carbon, carbide, nitride, boride and metal and other materials easy to oxidize can be sintered in vacuum or a controllable atmosphere, for example a nitrogen atmosphere, a high-pressure atmosphere and a reducing atmosphere. Continuous production of products is achieved, operation efficiency is greatly improved, production capacity is enhanced, the labor environment is improved, the automation degree is increased, energy-saving and cost-reducing effects are significant, and remarkable popularization and application value is achieved.

Description

Technical field [0001] The invention relates to a sintering equipment, in particular to a sintering and heat treatment furnace for refractory materials, ceramics, metal materials, electronic materials and components under a special atmosphere. Background technique [0002] Silicon carbide products, silicon nitride products, metal products, other carbon-containing products, carbides, nitrides, and metal-containing materials are sintered at high temperatures, generally speaking, in vacuum, nitrogen and other oxygen-free atmospheres. [0003] The usual method is to put the product to be sintered into the sagger and bury it in the carbon particles, that is, the buried carbon method sintering. Buried carbon sintering can be carried out in a tunnel kiln. The disadvantages of this method are the low space utilization rate of the kiln, high labor intensity, poor operating environment, low yield, and it is difficult to make the metal in the product react to form nitrides. In order to conve...

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Problems solved by technology

This method has achieved certain practical results, but still cannot avoid the inherent problems, that is, the oxygen cannot be driven away, the nitriding atmosphere (nitrogen partial pressure) cannot be adjusted in a large range, the hydrogen has the risk of explosion, and the turnover is slow.

The inventor once proposed a high-temperature vacuum nitriding furnace, which can solve the problems of low space utilization and atmosphere control, and the slow turnover and low efficiency still exist

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