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Stripping Molybdenum Disulfide Coating for heat treating

The Fasteners base raw material treated with Molybdenum disulfide coatings to avoid the corrosion. Wherein as a commercial heat treater after the Hardening and Tempering the microstructure found formation of delta ferrite due to this coat. We have tried by pre-heating the parts at 450 °C, the residuals are sticking to the parts and not cleaned properly. Can you please provide your guide lines how to strip the coating to over come with the problem.

B. Raghavan
heat treater - Bangalore, Karnataka, India
June 24, 2010

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