The quality analysis for gas nitrocarburized inner gear ring of heavy truck imported from Austria was taken by means of macro/micro-examination, hardness measuring and running test.
The microstructure and hardness of the layer of H13 tool steel gas-nitrided in different heat treatment conditions were studied by X-ray, SEM and micro-hardnesstest.
Micro-hardnesstest further demonstrates that interface center of aluminum alloy and galvanized steel is composed of high hardness intermetallic compounds.