Hello all!
Im an intern at a heat treatment facility as a mechanical engineer. (non english speaking so sorry for typo-o's
I have a task which is causing alot of trouble in our case hardening department.
A costumer is producing different sizes axels in 20MnCr5.
When one certan size axel is treatet they simply dont get any carbon addition in the surface. The other parts in the oven at the same time have perfect result, but this particular axel doesnt.
I have tried to measurre hardness to see if there is any difference after treatment, but no change.
I got my hands on a piece of their raw material before they machined it, and tried to treat that part with great succes. It had the desired case.
So im thinking there is something in the machining of that particular size axel that leaves a protective "shell" so it wont be treated.
Does anyone have any suggestions or experience with similar problems ?
/Kenneth
Im an intern at a heat treatment facility as a mechanical engineer. (non english speaking so sorry for typo-o's
I have a task which is causing alot of trouble in our case hardening department.
A costumer is producing different sizes axels in 20MnCr5.
When one certan size axel is treatet they simply dont get any carbon addition in the surface. The other parts in the oven at the same time have perfect result, but this particular axel doesnt.
I have tried to measurre hardness to see if there is any difference after treatment, but no change.
I got my hands on a piece of their raw material before they machined it, and tried to treat that part with great succes. It had the desired case.
So im thinking there is something in the machining of that particular size axel that leaves a protective "shell" so it wont be treated.
Does anyone have any suggestions or experience with similar problems ?
/Kenneth