varmtvalset

Varmvalsning is a metalworking process used to shape steel and other metals at high temperatures. The material is heated above its recrystallization temperature, which is typically above 900 degrees Celsius for steel. This elevated temperature makes the metal more malleable and easier to deform without causing work hardening.

The process typically begins with a large slab or billet of metal, which is heated in a furnace. Once the desired temperature is reached, the hot metal is passed through a series of rollers. These rollers exert immense pressure, reducing the thickness and changing the shape of the metal according to the desired specifications. Multiple passes through different roller configurations may be necessary to achieve the final dimensions.

Varmvalsning results in a product with a characteristic scaled surface due to oxidation at high temperatures. The edges of varmvalsade products are typically rounded due to the deformation process. This method is widely used for producing structural shapes such as beams, rails, and plates, as well as for creating initial forms for further processing like cold rolling. It is an efficient method for large-scale production of metal components where precise dimensional tolerances are not the primary concern.