Cold work tool steel 9Mn2V/1.2842/O2 Hot Rolled/Forged Steel Flat Bar/Machined/Grinded /Steel Block

Cold work tool steel 9Mn2V/1.2842/O2 Hot Rolled/Forged Steel Flat Bar/Machined/Grinded /Steel Block

Caratteristiche
1. Cold work tool steel with high dimensional stability at heat treatment.
2. Very high cracking resistance. High machinability, medium thoughness and wear resistance.

Trattamento termico
Ricottura
680 to 720°C
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness af ter annealing: Max. 220 HB.

Indurimento
790 to 820°C
Oil, salt bath (200 to 250°C) up to 20 mm thickness. Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 63 – 65 HRC

Rilascio delle tensioni
Approx. 650°C
Raffreddamento lento in forno; finalizzato a ridurre le tensioni generate da lavorazioni estese o da forme complesse. Dopo il riscaldamento completo, mantenere in atmosfera neutra per 1–2 ore.

Temperatura
Slow heating to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm of work piece thickness, but at least 2 hours/cooling in air.For certain cases we recommend to reduce tempering temperature and increase holdingtime.

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