How to explain the increase or the decrease of the surface roughness after the friction
How to explain the increase or the decrease of the surface roughness after the friction
(OP)
Hello,
I'm doing friction test with WC tools with different surface texture and CBN tool against workpiece made of steel. After the frition test carried out with a normal load of 50N,I noticed that the roughness of the workpiece worked with CBN decreases whereas the roughness of the workpiece worked with WC tools decreases. I attached an histogramm with the roughness of the workpiece before and after the friction test.
I would like to know why the surface roughness of the workpiece increases with WC tools and decreases with CBN tool?
Is it due to the wear behavior of the tools?
Thank you in advance for your help
I'm doing friction test with WC tools with different surface texture and CBN tool against workpiece made of steel. After the frition test carried out with a normal load of 50N,I noticed that the roughness of the workpiece worked with CBN decreases whereas the roughness of the workpiece worked with WC tools decreases. I attached an histogramm with the roughness of the workpiece before and after the friction test.
I would like to know why the surface roughness of the workpiece increases with WC tools and decreases with CBN tool?
Is it due to the wear behavior of the tools?
Thank you in advance for your help





RE: How to explain the increase or the decrease of the surface roughness after the friction
RE: How to explain the increase or the decrease of the surface roughness after the friction
Thank you for your answer. I attached a pic of the surface of a workpiece.
All the workpieces have always the same marks on it whenhever the tool used.
RE: How to explain the increase or the decrease of the surface roughness after the friction
I would wonder how this tungsten carbide has been prepared. Often tungsten carbide is sandblasted after sintering to clean it up.
There are lots of other possible considerations but I believe I would start by making sure that you are using the same grain size in both applications.
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: How to explain the increase or the decrease of the surface roughness after the friction
RE: How to explain the increase or the decrease of the surface roughness after the friction
Have you considered that you may be getting work-piece pickup in the WC tool-piece that is causing the roughness to increase? Do you have an SEM or optical profilometer available? These tools will be valuable in helping you get your answer.
Uconmaterials