SAMURAI KRAUT SPACE MAGIC
Our Samurai Kraut Space Magic is capable of improving wear resistance and fatigue strength, as well as improving sliding properties, reducing frictional resistance, preventing lubricant shortage, and finely refining crystal grains on the surface while suppressing surface roughness.
After our process has been completed, your parts will benefit from the following effects. Strength improvement due to finer crystal grains in the surface layer. Large compressive residual stress near the surface. Surface hardness improvement due to work hardening. Lubricant retention function (oil pool) due to the formation of micro dimples, reducing sliding resistance. Surface defects crushed such as cutting marks from machining.
Surface Hardening
The surface of the workpiece that has been treated is subjected to plastic deformation, which has excellent processing efficiency, resulting in fine grain strengthening and work hardening of the surface layer, and the addition of large compressive residual stress near the surface. In other words, the increase in surface strength (yield point) suppresses the occurrence of cracks, and the addition of compressive residual stress suppresses crack growth, greatly improving fatigue strength. The first graph is a hardness value (Hv) comparison of different metals before and after treatment. The second graph, a comparison of rupture cycle testing, showing the lifespan increase of treated parts.
In Depth Look At Surface Roughness
A mirror finish is often seen as the best you can get for reduced friction of parts. However a comparison between a mirror finish and a post treated surface, we can learn some information only seen at the microscopic level. Roughness Average (Ra) is improved over 33% while the Average Maximum Height of the Profile (Rz) is improved by roughly 20%. These are the arithmetic averages of the absolute values of the profile heights over the evaluation length, and the average of the vertical distance between the highest and lowest points of a profile. Skewness (Rsk) measures -1.089 on a mirrored surface versus 0.345 on a treated part. This takes a negative skewness, indicating a greater percentage of the profile is above the mean line versus a positive value, indicating a greater percentage below the mean line. Finally, the Valley Depth (Rvk) is improved from 0.041 to 0.514 after treatment. This shows a greatly increased distance between the highest profile peak and the intersection line of the surface ratio. All observational measurements of the surface material (SCM415 carburized material) taken on laser microscope x 1000x.
Improved Sliding Performance Through Micro-Dimple Formation
Finally, we take a look at a comparison of an untreated surface with surface defects (grinding marks) versus a surface modified after treatment. The surface defects such as cutting marks from machining are crushed, and at the same time, numerous recesses called micro dimples are formed. These recesses promote surface tension and act as lubricant retention (oil pools), maintaining good lubrication conditions, suppressing oil temperature rises, and preventing wear. It has also been found that the contact of the sliding parts changes from surface contact to point contact, reducing the contact area, thereby reducing frictional resistance and sliding noise. Additionally, a solid lubricant mixture including Molybdenum Disulfide is imparted in to the surface of the material during treatment, offering better wear and corrosion protection as well as improved sliding performance. All observational measurements of the surface material (SCM415 carburized material) taken on laser microscope x 500x.
