Roller Hearth Furnace for Nonferrous Tubes and Bars

Pipes, bars and other semi-finished products made from non-ferrous metals, including wire coils, are becoming increasingly important throughout industry.

Roller hearth furnace plants can be used to treat a very wide range of products which are used in all industrial sectors. Economical, energy-efficient heat treatment plants are essential to meet the growing requirements faced by materials, such as increased cleanliness in the pharmaceutical industry and weight reduction without sacrificing strength and other properties in the automobile industry, and to produce large quantities of materials required throughout the world.

The heat treatment is an essential stage in the production and processing of pipes and bars made from non-ferrous metals. This heat treatment is mainly carried out in roller hearth furnaces, which may either be electrically heated or gas-fired. The main heat treatment processes under protective gas atmosphere in a roller hearth furnace plant are bright annealing in combination with

• Stress relief
• Recrystallization (Soft Annealing)
• Homogenization Annealing
• Precipitation Hardening

Tenova LOI roller hearth furnace plants can be operated according to the requirements with a neutral, oxidizing or reducing protective controlled atmosphere and therefore achieve the highest requirements. The controlled atmospheres consist of neutral or inert constituents. However, they may contain reactive components for process reasons.

The neutral or inert component is mainly nitrogen, although argon or helium may be used in special cases. The active or reactive components are mainly hydrogen or carbon monoxide mainly in combinations. with nitrogen as an active gas.