Study on Microstructure and Properties of 45 Steel Small Module Gear After Nitrogen and Super Audio Composite Process
The microstructure of 45 steel small module gear after liquid nitrogen-super audio quenching composite process contains 1.13% of residual austenite,which is beneficial to prevent gear surface from quenching crack.And nitrogen martensite has high tenacity,high residual compressive stress,high hardness,wear resistance,corrosion resistance,fatigue resistance,good tempering stability and self lubricating performance,and it has the ideal hardness gradient distribution,and better strong toughness fit.