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1.2063 is a chromium-alloyed tool steel based on bearing steel 1.3505, but with a greatly increased carbon content. This results in a higher achievable working hardness and higher wear resistance. At the same time, the total amount of carbides is still low enough to enable even the finest cutting edges.
Working hardenings of 65-66hrc are possible with standard knife cross-sections and the use of fast hardening oil.
The wear resistance is only slightly below that of 1.2419.05. However, the steel offers better cutting edge stability with very finely ground blades and very acute edge angles. Furthermore, the steel forms a very stable patina due to the chrome content, which makes it particularly interesting in the kitchen knife sector.
For me personally, 1.2063 is one of the best for kitchen knives among the melt-metallurgical low-alloy steels. It is equally suitable for powerful workhorses as well as for fine laser geometries.
Due to the high carbon content, the steel does not tolerate excessive temperatures during forging and fire welding. The steel can be used well for the production of high performance damascus steel, e.g. in combination with 1.2767 or 1.5634 and 1.2510. However, precise temperature control and a low-oxygen atmosphere are necessary. I recommend forge welding under complete exclusion of oxygen.
I myself do not offer a hardening service for the steels I sell. However, I can unreservedly recommend the hardening service of my colleague Jürgen Schanz. He works with a very experienced hardening shop that also carries out demanding heat treatments exactly according to customer requirements. If necessary, contact Jürgen Schanz directly via his contact form.
9x40x500mm = 1404g
9x50x600mm = 2279g
Rolled, sandblasted, annealed
The flat material is cut with the laser cutter. Superficial oxidation and hardening can therefore occur at the cut edge. This structural change is only a few hundredths of a millimeter thick and can easily be ground off.
|Recommended heat treatment:||
Forging: Form forging (heavy deformation) between 1100 °C and 850 °C. Fine forging (minor deformation) between 850 °C and 750 °C.
Normalize: 2x Heat up to 860 °C and immediately cool in air to below 721 °C (Ar1). Then 3x heat up to 800 °C and immediately quench in oil until the glow color has disappeared.
Soft annealing: hold at 720 °C for approx. 60 minutes, then cool down in the furnace.
Hardening: 840 °C (6-8 min holding time)
Quenching: Oil, AAA-DA or Durixol V35
Tempering: 175°C to max. 200°C. 2x one hour each, water cooling in between.
Achievable hardness: 64-66 hrc.
Note: A deep freeze treatment (-70 °C) between hardening and tempering can reduce the retained austenite content and thus increase the working hardness with the same toughness.