دراسة عملية النترده لعينات مطلية بالكروم بطريقة الترسيب

Abstract

In this paper nitriding is performed on (Nitralloy135) alloyed steel which iscoated with chromium before heat treatment. Tests and inspections werepreformed like coated layer depth and hardness .The result show thatnitriding layer depth increases with nitriding time. Max. Layer depth is(0.45) mm with nitriding time (90) min. , when chromium is added to thealloy the nitriding depth layer increased with time decrease, and also inmicro structure test shows fine and uniform structure and stable steelphases.As for mechanical properties hardness was (1000HV) at (550°C), Also othermechanical properties (Tensile Stress, Yield Point, Elongation) as shown inproperties table ,So we have a hard tough sample with good properties asthe objective of this paper.