Welding
In welding, preheating is often necessary to minimize the risk of cracking in the welded joint. The preheat temperature depends on factors such as the type of material, thickness, and the welding process being used.
For example, in the welding of certain steels, preheat temperatures might range from 200°C to 600°C (392°F to 1112°F).
Metal Forming
In metal forming processes, such as forging or hot rolling, preheating is sometimes required to reduce the forces needed for deformation and to improve the material's ductility.
Temperatures for preheating in metal forming can vary widely, but they often fall in the range of 300°C to 900°C (572°F to 1652°F).
Heat Treatment
Certain heat treatment processes, like annealing or hardening, may involve preheating to achieve uniform temperature distribution before the main heat treatment step.
Preheat temperatures for heat treatment can range from a few hundred to over 1000°C, depending on the material and the desired outcome.
Plastics Processing
In plastic molding processes, preheating molds or raw materials can enhance the flow properties of the plastic and improve the quality of the molded product.
Preheat temperatures for plastics processing can vary depending on the type of plastic and the specific molding process.
It's important to note that the specific preheat temperatures and procedures should be determined based on the material specifications, industry standards, and the requirements of the manufacturing or processing operation. Pyradia’s engineers and technicians in each field carefully consider these factors to optimize the preheat process for the best results.
INDUSTRIAL PREHEATING OVEN
Industrial preheating ovens are used for heating a product prior to forming, coating, fitting, or welding. Products are placed in the industrial preheating oven for a designated time frame as they are being prepared for the next step in the production process. Metal parts are preheated in a batch or conveyor oven prior to powder coating, which provides greater powder thickness. Shrink fitting of bearings is also a common use of pre-heating; bearings are heated in an oven, causing them to expand, which in turn causes expansion of the diameter of the bore where the shaft is fitted. Immediately after removal from the oven, the bearing is put on the shaft. When the bearing cools, it shrinks onto the shaft, forming an extremely tight, interference fit that doesn’t require fasteners.
Wisconsin Oven manufactures industrial preheating ovens, walk-in ovens, batch, and conveyor ovens; all for pre-heating applications and will work with you to determine the best equipment configuration for your process.
