TH9166B - Methods and equipment for vacuum carburizing and the products resulting from it. - Google Patents

Abstract

To minimize soot formation and ensure even and thorough carburization of all parts of the workpiece, including deep cavities, vacuum carburization was used, minimizing gas and heat consumption. The carburization process was performed in heating chamber 2 of vacuum carburizing furnace 1. Workpiece M was heated while acetylene gas was supplied from the carburizing gas source C inside heating chamber 2. The air inside heating chamber 2 was then vented to create a vacuum V of < 1 kPa.

Claims (8)

1.Vacuum carburizing method is a vacuum carburizing method where the carburizing process is performed by vacuum heating of the piece. Work from steel material In the heating chamber of the carburized furnace with vacuum and the carburized gas supply to A heating chamber containing unsaturated aliphatic hydrocarbon gas. Containing Acetylene gas To be used as a carburized gas, and the carburization process Done with a heating room with a vacuum of not more than 1 kPa 2. The vacuum carburization method as described in Clause 1, where the acetylene gas contains acetylene gas. 3. The vacuum carburization method described in Clause 1, which also consists of the action of the carbon nitride process by adding a nitrogen gas source. To the carburized gas 4.Vacuum carburizing equipment Where there is also a carburized furnace A vacuum with a heating chamber to heat a workpiece containing steel material and Carburized gas sources which supply acetylene gas into the heating chamber and vacuum source. Which will suck the air from the heating chamber until a pressure is not greater than 1 kPa where such vacuum carburization is performed at no more than 1 kPa 5. Carburized steel products Which is a steel product with a concave part Close where the inner wall of the aforementioned is carburized with a circumference in D and a depth L of the region, above it is the carburized box depth in the inner wall of the hole close As mentioned above, it is almost the same as directed by the manner in which the L / D ratio will be in the range 12-50. 6. Carburized steel products as described in Clause 5 where the aforementioned L / D ratio ranges 12-36. 7.Vacuum carburization method, which is the vacuum carburization method where Carburizing process It is done by heating the vacuum to the workpiece from iron material. Dare in the heating chamber of the carburized furnace with vacuum And the delivery of carburized gas At the heating chamber which consists of using Aliphatic hydrocarbon gas containing unsaturated hydrocarbons With acetylene, Nick used as the carburized gas. And the carburizing process will be done With a heating chamber that a vacuum of not more than 0.5kPA 8.Vacuum carburizing equipment Where there is also a carburized furnace A vacuum with a heating chamber to heat a workpiece containing steel material and Carburized gas source, which supplies acetylene gas into the heating chamber and vacuum source. Which will suck the air from the heating chamber until the pressure is no more than 0.5 kPa, where such vacuum carburization is performed at no more than 0.5 kPA.