Process for producing a corrosion-resistant austenitic alloy component

A process for producing an austenitic, substantially ferrite-free component, wherein the component has a fatigue strength under reversed stresses at room temperature of greater than about 400 MPa at 107 load alternation, and the process comprises:

• (a) providing a cast piece of an alloy which comprises, in % by weight,
• from about 0% to about 0.35% of carbon
• from about 0% to about 0.75% of silicon
• from more than about 20.0% to about 30.0% of manganese
• from more than about 17.0% to about 24.0% of chromium
• from more than 1.90% to about 5.5% of molybdenum
• from about 0% to about 2.0% of tungsten
• from 3.6% to about 15.0% of nickel
• from about 0% to about 5.0% of cobalt
• from 0.60% to about 1.05% of nitrogen
• from about 0% to about 0.005% of boron
• from about 0% to about 0.30% of sulfur
• from about 0% to less than about 0.5% of copper
• from about 0% to less than about 0.05% of aluminum
• from about 0% to less than about 0.035% of phosphorus,
• and optionally one or more elements selected from vanadium, niobium and titanium in a total concentration of not more than about 0.85%, balance iron and production-related impurities,
• (b) forming the cast piece at a temperature of above about 750° C. into a semi-finished product in two or more hot working partial operations,
• (c) subjecting the semi-finished product to intensified cooling,
• (d) forming the cooled semi-finished product at a temperature below a recrystallization temperature, and
• (e) converting the semi-finished product into the component by a process which comprises machining.