时间：2014-07-11 19:16　作者：admin　点击： 次

Definition: No. 45 steel is a high-quality carbon structural steel with a carbon content of 0.42~0.50%, and 45 is the intermediate value.
No. 45 steel is a high-quality carbon structural steel with low hardness and easy cutting processing. It is a common material for shaft parts. After quenching and tempering (or normalizing), better cutting performance can be obtained, and higher Comprehensive mechanical properties such as strength and toughness, the surface hardness can reach 45~35HRC after quenching.
45# steel is widely used in mechanical manufacturing, and the mechanical properties of this steel are very good.But this is a medium carbon steel, and its quenching performance is not good. No. 45 steel can be quenched to HRC42~46.Therefore, if the surface hardness is required and the superior mechanical properties of 45# steel are desired, the surface of 45# steel is often carburized and quenched, so that the required surface hardness can be obtained.
After quenching and tempering, the parts have good comprehensive mechanical properties and are widely used in various important structural parts.