TH9166B - Methods and equipment using carburizing with vacuum and the resulting products - Google Patents

Abstract

In order to minimize soot formation and make every part of the workpiece including channels The deep cavity is carburized evenly and thoroughly. By carburizing with vacuum and Reduces the amount of gas and heat used. The carburizing process was performed in the heating chamber 2 of the carburized furnace with vacuum 1, where the M-piece was heated while the acetylene gas was applied. From the carburized gas source C, inside the heating chamber 2 and the inside of the heating chamber 2, air is drawn out by the suction source to produce vacuum V at <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.