The materials used to manufacture these elements are mainly steels (tool steels, HSS, stainless…), as well as cemented carbide. Practically everything stated above is also applicable to the saws.
Cryogenic treatments have a big advantage in this type of applications because these tools are usually sharpened several times throughout their life. Since this process permanently affect the entire volume of the material, the tools only have to be treated once and subsequent sharpening operations do not cause loss of performance. Additionally, PVD coatings are not a problem at all because both treatments are fully compatible.
Although, as usual, the results depend on the material and application considered, it is not uncommon for the cryogenically treated knives and saws to multiply their sharpening intervals by two, three or even more. Moreover, in the treated edges the wear tends to be more uniform and less material needs to be removed in each sharpening operation, thus getting more uses from the knife. Apart from the obvious savings derived from lower consumption of tools, this significantly increases the intervals for tooling change, having a direct positive impact on productivity, quality and costs.
COUNTlESS EXAMPLESOne of them is the circular slitting knives used in cutting lines for sheet metal. The use of cryogenic treatment in these tools usually makes them last more than double.
There are also many applications in the field of wood processing, where the use of knives and saws is intensive. With the use of multistage cryogenic treatments, the knives for wood chipping (e.g. to manufacture pulp for paper) may triple their life between sharpening operations. Taking into account that some of these blades need to be changed for sharpening every few hours, it is easy to understand the interest of the process for these applications.
The same can be applied to saws, including those with brazed carbide tips (also common for wood cutting). In this group of tools the use of cryogenic treatments also provides excellent results. Chainsaws, straight and circular knives for paper, scalpels, mowing blades, razors, scissors, pincers, etc. are just some examples of the many applications where cryogenic treatments are successfully used in the field of cutting.