Description

Patenting is complicated, including two steps: heating and controlled cooling. This paper reviews control of furnace atmosphere. Furnaces usually have an entrance stack; hot gases flow counter to wire. Two linked variables must remain fixed: temperature and atmosphere composition. Temperature control is easy, atmosphere is not. Crude methods like maintaining air/gas ratio prior to combustion are used; this is not important; atmosphere composition is. Assuming furnace atmosphere is a function of combustion ratio is fantasy.