Major Technical Specifications For GS2311 Die Steel

GS2311 steel is Germany (SAARSTAHL) super high quality hard plastic die steel, pre-hardened, after calcification, vacuum degassing and heat treatment, machinability and polishing performance is good, more suitable for EDM.

Hot working. The heating temperature ranges from 1050 850 C. The annealing temperature ranges from 850 900 C and the outlet air-cooled.

Softening annealing. The annealing temperature ranges from 710 740 C, and the holding time is determined by 1 hour of wall thickness every 25 mm.

Stress Removal Treatment. The heating temperature is 600 C (annealing state) and 550 C (quenching and tempering state). The holding time is determined according to the wall thickness of every 50mm for 1h. After holding, it is cooled with the furnace.

Quenching and tempering. The preheating temperature is 500 – 600 C, the quenching temperature is 840 – 880 C, and the heat preservation is 30 minutes (the die must be quenched in a protective atmosphere to avoid oxidation and decarbonization). Oil-cooled, cooled to 50-70 degrees C, temper immediately. Tempering holding time is determined by workpiece thickness every 25 mm time 1 hour, at least 2 hours. Tempering temperature 180 C/200 C/.

The hardness is 52HRC/51HRC/48 HRC/46HRC/42HRC/34HRC.

Flame induction hardening. The steel can be hardened to 50HRC by flame or induction hardening, and air-cooled after hardening. General quenching medium can be used for small die. Tempering should be done immediately after hardening. Tempering temperature is 180~200 C.

Nitriding criterion. Nitriding temperature and time: 525 C 20h, the thickness of nitriding layer is 0.30mm; 525 C 30h, the thickness of nitriding layer is 0.35mm; 525 C 50h, the thickness of nitriding layer is 0.50mm.

Soft nitriding treatment. The hardness of the die surface is about 700 HV and the depth of nitriding layer is about 0.1 mm.