Zhejiang Sanmen Taihe Heavy Forging Co., Ltd. is professional China hot forging steel suppliers and 2311 Steels manufacturers , welcome to make any information consultation,Quick response and rapid delivery,Diversified products and quality assurance,Accept customization and meet your requirement.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 2344 steel 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 2343 steel 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 718 steel 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.