Valve stem nitriding+post oxidation heat treatment

The valve and valve stem have been working in high temperature, high speed and corrosive environment for a long time. The pressure stress is formed on the surface after the soft nitriding process is adopted, which improves the fatigue strength of the valve and has good wear resistance and anti seizure performance. It can completely replace the hard chromium plating and surfacing alloy process of the original rod. The oxidation after nitriding further improves its corrosion resistance, achieving the purpose of energy saving, high efficiency and environmental protection.