Method and apparatus for carburizing gas

摘要

Problem to be solved: to provide a gas carburizing method and a gas carburizing apparatus capable of ensuring a stable quality by bringing the carburizing gas into a more uniform contact with the work in the heat treatment furnace.The process of disposing the workpiece 100 in the furnace 10a of the heat treatment furnace under normal pressure andThe process of supplying the carrier gas to the furnace 10a andHeating the furnace 10A in which the workpiece 100 has been disposed and heating the furnaceCarburizing of the workpiece 100 is carried out by supplying carburized gas to the furnace 10A after heatingIncludingIn the carburizing process described above,By at least one of the carrier gas and carburized gasAn inner wall flow Q, which flows downward along the inner wall of the furnace 10a, is formed.In the center of the furnaceA central flow u flowing upward is formed.Diagram