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Vacuum carburizing device for steel, comprises carburizing chamber for material to be processed, vacuum pump, carburizing gas supply for the chamber in stroke operation, return pipe, opening- and closing valves, and control equipment
Vacuum carburizing device for steel, comprises carburizing chamber for material to be processed, vacuum pump, carburizing gas supply for the chamber in stroke operation, return pipe, opening- and closing valves, and control equipment
The vacuum carburizing device for steel, comprises a carburizing chamber (3) for a material to be processed, a vacuum pump, which sucks gas from the carburizing chamber to obtain a vacuum, a carburizing gas supply (4) for the carburizing chamber in a stroke operation, a return pipe (15), which connects an inlet side and an outlet side of the vacuum pump, opening- and closing valves (16) arranged in the flow of the return pipe, and a control equipment (20), which opens the opening and closing valve, when a supply of carburizing gas into the carburizing chamber is started. The vacuum carburizing device for steel, comprises a carburizing chamber (3) for a material to be processed, a vacuum pump, which sucks gas from the carburizing chamber to obtain a vacuum, a carburizing gas supply (4) for the carburizing chamber in a stroke operation, a return pipe (15), which connects an inlet side and an outlet side of the vacuum pump, opening- and closing valves (16) arranged in the flow of the return pipe, a control equipment (20), which opens the opening and closing valve, when a supply of carburizing gas into the carburizing chamber is started and closes the opening and closing valve when the carburizing gas supply ends, and a flow-quantity control valve (17), which is arranged in the flow of the return pipe and adjusts a quantity of the carburizing gas returned to the inlet side of the vacuum pump. An independent claim is included for a method for carburizing a material to be processed.
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