Firstly, thank you to everybody who has offered a reply so far.
The decarburization (correct spelling noted!) is approximately 20 microns not mm. The parts are cleaned in a vapour degreaser prior to being heat treated. The vapour degreaser is using a Trychloroethylene equivalent product...
Hi,
I have a problem with a 20mm decorborised layer being formed on heat treated 440C. The components are heat treated in a vacuum furnace at a temperature of 1050 degC and oil quenched.
It was initially though that the cause of this layer was due to air being drawn through the vacuum chamber...
