Nitrogen - vacuum heat treatment the important auxiliary facilities

Nitrogen - vacuum heat treatment the important auxiliary facilities

Nitrogen, sounds like a "loner" word, in fact, it is widely used in national economy and life, especially in the casting industry, nitrogen is often used to deal with the vacuum heat treatment furnace and recycled purging, prevent the formation of metal surface oxidation and reduce the dross.
When steel in the vacuum furnace heated, if high vacuum degree, the volatilization of the alloying elements in order to prevent the workpiece material, need to recharge the right amount of nitrogen in the furnace, to trace the pressure of the gas from the oven.
In the process of vacuum heating oil quenching vacuum quenching, sometimes to ensure or improve the cooling ability of quench oil, before the workpiece cooling, the comparison of vacuum heat treatment is both at home and abroad are adopting advanced heat treatment method, in the vacuum heat treatment, often without the use of nitrogen.
When steel in the vacuum furnace heated, if high vacuum degree, the volatilization of the alloying elements in order to prevent the workpiece material, need to recharge the right amount of nitrogen in the furnace, to trace the pressure of the gas from the oven.
In the process of vacuum heating oil quenching vacuum quenching, sometimes to ensure or improve the cooling ability of quench oil, before the workpiece cooling, to back plenty enough nitrogen in vacuum furnace. In high pressure gas quenching, need to quickly to the vacuum furnace in filling the above an atmosphere of nitrogen. Used in the steel bending steel pipe bender) vacuum tempering, the need to recharge after vacuum nitrogen to achieve uniform heating furnace protection gas circulation, and realize the fast cooling after tempering.
Overall vacuum heat treatment furnace using the chemical stability of nitrogen, the inert nature, at the time of heat treatment, back filling nitrogen, to adjust the vacuum furnace, prevent the volatilization of metal elements; When quenching, recharge nitrogen, achieve the goal of improve the cooling capacity.