A method of steel processing combining thermal and mechanical processing of steels in controlled sequences. The method of the present invention combines thermal and mechanical processing in controlled sequences to achieve material property results that are superior to existing methods. The method allows for manipulation of steel processing variables, which promotes further elimination of retained austenite, additional residual compression, reduced surface tension, increased material strength, increased compressive stresses at the surface, and significantly improved bending fatigue and wear resistance. By varying the sequence of mechanical processing of the steel, desired residual compressive stress responses and hardness levels may be achieved. In addition, this processing can reduce embrittlement caused by late stage phase transformation.

A method of producing a nano twinned commercially pure titanium material includes the step of casting a commercially pure titanium material, that apart from titanium, contains not more than 0.05 wt % N; not more than 0.08 wt % C; not more than 0.015 wt % H; not more than 0.50 wt % Fe; not more than 0.40 wt % O; and not more than 0.40 wt % residuals. The material is brought to a temperature at or below 0 C. and plastic deformation is imparted to the material at that temperature to such a degree that nano twins are formed in the material.

The present invention relates to a maraging steel containing, in terms of mass %, 0.10C0.35, 9.0Co20.0, 1.0(Mo+W/2)2.0, 1.0Cr4.0, a certain amount of Ni, a certain amount of Al, and V+Nb0.60, with the balance being Fe and inevitable impurities, in which in a case of V+Nb0.020, the amount of Ni is 6.0Ni9.4 and the amount of Al is 1.4Al2.0, and in a case of 0.020<V+Nb0.60, the amount of Ni is 6.0Ni20.0 and the amount of Al is 0.50Al2.0.

The present invention relates to a maraging steel containing, in terms of mass %, 0.10C0.35, 9.0Co20.0, 1.0(Mo+W/2)2.0, 1.0Cr4.0, a certain amount of Ni, a certain amount of Al, and V+Nb0.60, with the balance being Fe and inevitable impurities, in which in a case of V+Nb0.020, the amount of Ni is 6.0Ni9.4 and the amount of Al is 1.4Al2.0, and in a case of 0.020<V+Nb0.60, the amount of Ni is 6.0Ni20.0 and the amount of Al is 0.50Al2.0.

Provided is a blade material having high strength. The blade material contains, in % by mass, 0.5 to 0.8% of C, 1.0% or less of Si, 1.0% or less of Mn, 11 to 15% of Cr, and 0.1 to 0.8% of V, the remainder includes Fe and inevitable impurities, and has a thickness of 0.5 mm or less, wherein the structure of the blade material as observed after polishing the surface thereof has ferrites and carbides, the carbides have an average particle diameter of 0.5 m or less, and a proportion of carbides containing V in the carbides is 50% or less in terms of a proportion in an area of a field of view.

The invention relates to a method for producing a component from a medium-manganese flat steel product with 4 to 12 wt % Mn, preferably more than 5 to less than 10 wt % Mn, and with TRIP/TWIP effect. In order to improve the degrees of deformation of the shaped component while at the same time reducing the forming forces, the invention proposes shaping the flat steel product into a component in a first shaping step at a temperature of the flat steel product of 60 C. to below Ac3, preferably from 60 C. to 450 C. The invention also relates to a component produced according to said method and to a use for said components.

The invention relates to a method for producing a component from a medium-manganese flat steel product with 4 to 12 wt % Mn, preferably more than 5 to less than 10 wt % Mn, and with TRIP/TWIP effect. In order to improve the degrees of deformation of the shaped component while at the same time reducing the forming forces, the invention proposes shaping the flat steel product into a component in a first shaping step at a temperature of the flat steel product of 60 C. to below Ac3, preferably from 60 C. to 450 C. The invention also relates to a component produced according to said method and to a use for said components.

The present invention relates to a maraging steel containing, in terms of mass %, 0.20C0.35, 9.0Co20.0, 1.0(Mo+W/2)2.0, 1.0Cr4.0, and a certain amount of Ni, with the balance being Fe and inevitable impurities, in which in a case where the contents of V and Nb satisfy V+Nb0.020 mass %, the amount of Ni is 6.0Ni9.4, and in which in a case where the contents of V and Nb satisfy 0.020 mass %<V+Nb0.60 mass %, the amount of Ni is 6.0Ni16.0.

The present invention relates to a maraging steel containing, in terms of mass %, 0.20C0.35, 9.0Co20.0, 1.0(Mo+W/2)2.0, 1.0Cr4.0, and a certain amount of Ni, with the balance being Fe and inevitable impurities, in which in a case where the contents of V and Nb satisfy V+Nb0.020 mass %, the amount of Ni is 6.0Ni9.4, and in which in a case where the contents of V and Nb satisfy 0.020 mass %<V+Nb0.60 mass %, the amount of Ni is 6.0Ni16.0.

Disclosed is a martensitic stainless steel material for a hydrogen gas environment, having a composition consisting of: 0.03 mass %?C?1.20 mass %, Si?1.00 mass %, Mn?1.50 mass %, P?0.060 mass %, S?0.250 mass %, Cu?0.50 mass %, 8.0 mass %?Cr?22.0 mass %, Ni?1.00 mass %, and N?0.40 mass %, and optionally at least one selected from the group consisting of: Mo?3.00 mass %, V?1.50 mass %, Nb?1.00 mass %, Pb?0.30 mass %, and B?0.0500 mass %, with the balance being Fe and inevitable impurities; having: a content of a precipitate of 1.50 mass % or more, a crystal grain size number of prior austenite grains of 2.0 or more, a metal structure including a martensite structure, a tensile strength of 1,800 MPa or less, and satisfying D.sub.H2(0.7)/D.sub.air?0.8.