Material characteristics: after vacuum degassing and electroslag remelting, the material has polar S and P content, and the steel is purer; Super mirror polishing (mirror polishing can reach 12000 mesh); It has high wear resistance and toughness; Has strong corrosion resistance; The size change of heat treatment is very small; Factory status: annealing ≤ 250 HB;
Heat treatment process Thermal processing temperature:1160/900℃; Annealing: heating to 780℃ and air cooling, softening and annealing hardness is not more than 230HB；; Quenching and hardening: the quenching temperature is 1020- 1050℃, and oil quenching is adopted, with HRC 55 ~ 58.
It is the preferred material for light guide plate.