Red color after Heat treatment
Red color after Heat treatment
(OP)
We are heat treating 52100 (100Cr6) material with salt quenching.
After heat treatment we are observing red colour (powder like layer) on the surface of the parts.
If i try of wipe of with cloth it gets removed, and it is not like rust.
The process are Prewash ---- 860 C / 2 Hrs --- Salt quench at 230 C / 2 hrs ----- Post wash.
Can anybody suggest what could be the reason for the red colour in the part surface.?
After heat treatment we are observing red colour (powder like layer) on the surface of the parts.
If i try of wipe of with cloth it gets removed, and it is not like rust.
The process are Prewash ---- 860 C / 2 Hrs --- Salt quench at 230 C / 2 hrs ----- Post wash.
Can anybody suggest what could be the reason for the red colour in the part surface.?
RE: Red color after Heat treatment
just kidding.
Dan T
RE: Red color after Heat treatment
It may be rust that is being deposited on the surface.
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P.E. Metallurgy, Plymouth Tube
RE: Red color after Heat treatment
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Red color after Heat treatment
RE: Red color after Heat treatment
RE: Red color after Heat treatment
http://heatbath.com/2012/06/the-basics-of-molten-s...
Washing and disposal: Due to the hygroscopic nature of chloride-based quenching salt, parts should be washed soon after quenching to avoid rusting.
RE: Red color after Heat treatment
RE: Red color after Heat treatment
metengr - X-Ray Diffraction would be the applicable method. It is widely used by rock sample analysis labs (geology/petrology) in case your local met lab does not offer it. I have found it a very useful tool in corrosion failure investigations.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."