høytryk

Høytryk is a Norwegian term referring to high pressure rolling or high pressure rolling oil. This is a manufacturing process used to improve the surface finish and fatigue properties of metal components. The technique involves subjecting a metal component to high pressure rolls, accompanied by a suitable lubricant, such as oil or grease.

The high-pressure rolling process involves forcing a metal component between two rolls under high pressure, without heat treatment. The process results in a surface finish that is comparable to shot peening. However, the shape and size of the surface irregularities, as well as the surface roughness produced by the two processes, differ.

High-pressure rolling is used in various applications, including engine blocks, cylinder heads, and gears. The process has also been found to enhance the resistance of metal components to fatigue. Additionally, it can improve the dimensional stability of certain parts, under high-temperature conditions. However, the use of high-pressure rolling may impose limitations on the choice of materials, depending on the particular characteristics of the metal components being produced.

Høytryk processing can be performed on most ferrous metals but is particularly useful for production of metal components such as gear wheels, driving wheels, and beams in high-strength applications. Certain non-ferrous metals like copper are also suitable for processing using høytryk. The method allows metal producers to grind and machine large parts quickly, as they present less resistance to cuts than small parts do.