Technical Requirements and Challenges of Furnace Rollers in Heat Treatment Processes

 

Operating in extreme environments of high temperature, heavy load, and specific atmospheres, furnace rollers themselves must meet extremely high technical requirements:

 

I. High Temperature Resistance: Furnace rollers must be able to operate continuously at temperatures ranging from hundreds to thousands of degrees Celsius while maintaining sufficient strength and creep resistance.

 

II. Resistance to High Temperature Deformation: Under high temperature and heavy loads, the roller body must possess extremely high rigidity to prevent bending deformation. Even minor deformations can cause indentations or scratches on the workpiece surface.

 

III. Material Compatibility: The roller material must have good chemical compatibility with the heat-treated workpiece and the furnace atmosphere. For example, when heat-treated with stainless steel, ferritic roller materials must be prevented from contaminating the stainless steel. In hydrogen-containing atmospheres, materials resistant to hydrogen embrittlement must be selected.

 

IV. Surface Quality and Structure: The roller surface must be smooth and flat, and different surface treatments (such as polishing or applying specific coatings) must be used according to process requirements to prevent adhesion to the softened workpiece surface ("thermal bonding") and reduce scratches on the workpiece.