T10 steel is a kind of high temperature hardened steel, and its high temperature quenching light microstructure is mainly martensite. The T10 steel after surface quenching by high temperature, the morphology of the roller cross section is there is obvious plane of separation between pearlitic and martensite structure. It can be seen from Figure 1 that the microstructure of the T10 steel is mainly composed of pearlite, which has strong mechanical properties and good wear resistance.
The microstructure of T10 steel after tempering for 18 hours is shown in Figure 2. It can be seen that the fiberous structure of the pearlite has been eliminated, and its size has become smaller. The microstructure of the steel after tempering is mainly composed of tiny twinned martensite. The mechanical properties of the steel have improved significantly. The impact toughness is improved and wear resistance is increased.
The microstructure of T10 steel after quenching and tempering for 27 hours is shown in Figure 3. It can be observed that there is more obvious separation plane between pearlite and martensite. The pearlite has almost disappeared, and the microstructure of the steel has been transformed into small twinned martensite and small granular cementite. The carbon content of T10 steel has increased, and its wear resistance has been improved significantly.
In summary, T10 steel has excellent mechanical properties and wear resistance after high-temperature quenching and tempering. The microstructure change is mainly the transformation of pearlite structure into twinned martensite structure, which is beneficial to improve the mechanical properties and wear resistance of the material. After the tempering process, the martensite structure becomes smaller, and the impact toughness of the material is improved. At the same time, the carbon content of the steel is increased, which further improves the wear resistance of the material.
