Ferro-Titanit WFN Steel

Ferro-Titanit WFN Steel

Steel name: Ferro-Titanit WFN
Diagram No.: 2342
Chemical composition in weight %: Carbide phase: 33% TiC, binder pahse: 0.75% C, 13.5% Cr, 3% Mo, Fe is balance.
Steel group: PM tool steels
Properties: Because of its 13.5% chromium and 3% molybdenum content, WFN has a high tempering resistance up to around 450 °C, as well as high-temperature hardness and good corrosion resistance. The thermal expansion coefficient is adjusted to that of steel through the 1% aluminium alloy addition. Lower stresses thereby occur when non-permanent and permanent joints are heated, reducing the risk of cracking.
Applications: All cold work applications in cutting and forming engineering. In particular for tools and wearing parts required to have a high tempering resistance up to 450 °C as well as elevated corrosion resistance, e.g. guide rollers for wire rod and bar steel rolling, injection moulds for plastics processing, jets for steam-jet equipment, valve components, tube drawing dies, extrusion dies for the manufacture of aerosol cans, cold rollers.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 1080 C, vacuum, quenching: 1 bar N2. Heating to hardening temperature is advisably performed over several preheating stages (e.g. 400 °C, 600 °C, 800 °C) in order to ensure uniform soaking of the parts that are to be hardened and to avoid any cracking induced by thermal stress. The selected soaking time at hardening temperature must be longer than for steel tools (roughly twice to three times). Because of the rigid titanium carbide skeleton, deleterious grain growth as found in tool steel and high-speed steel cannot occur during the heat treatment. It is hence possible to accept slightly higher hardening temperatures and longer soaking times rather than insufficient hardening.
Tempering: 460 C.
Diagram note: No tempering temperature other than the one indicated should be selected, as the strong, negative influence on the resistance to wear and pick-up does not justify the minor benefit of toughness improvement.

Tempering Diagram

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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