The role of tungsten in steel

(1) Increase strength

(2) improving the high temperature strength of steel

(3) improving the hydrogen resistance of steel

(4) to make the steel hot hardened.

Therefore, tungsten is the main alloy element in high speed tool steel.

The role of Titanium in Steel

(1)can improve the thermal strength of titanium, improve the creep resistance and high temperature durability of steel.

(2) to improve the stability of steel in high temperature and high pressure hydrogen, so that the stability of steel to hydrogen under high pressure is more than 600 degrees. In pearlite low alloy steel, titanium can prevent the lithodesertification of Mo steel at high temperature. Therefore, titanium is one of the important alloy elements in hot strength steel used in boiler high temperature elements.

The role of Niobium in Steel

(1) Niobium and carbon, nitrogen and oxygen all have strong binding force, and form the corresponding extremely stable compounds, so they can refine the grain and reduce the overheating sensitivity and tempering brittleness of the steel.

(2) has excellent hydrogen resistance

(3) niobium can improve the thermal strength of steel