Abstract: A friction stir welding tool includes a rotation-symmetrical shaft having a proximal end, a distal end, and a pin, which is arranged concentrically about the rotation axis and which has a smaller diameter than the shaft at the proximal end thereof, and thus projects as compared to a shoulder region of the shaft. The shaft, at least in the shoulder region, and the pin each consists of a high-temperature-resistant metal or an alloy thereof. The pin and/or the shaft in the shoulder region consist of or are coated by a composite material, which substantially consists of molybdenum, tungsten, niobium or tantalum or an alloy of at least one of these metals, and a reinforcement phase embedded therein and consisting of at least one material having a Mohs hardness >6, a micrometer particle size, and a free enthalpy of formation at 1300 K of less than ?350 kJ/mol O2.

Abstract: A tool for machining materials has a main part and one or more blades. The main part is made of a low-alloy steel. The socket is welded to the main part, and the blade edges are made of a hard metal. The hard metal contains at least 82 vol. % of tungsten carbide and a metallic binder made of a cobalt-nickel-based alloy. The hardness of the hard metal is greater than 1350 HV10. The socket has a sintered composite, and 40 vol. % to 60 vol. % of the composite is composed of a metal carbide and a metallic binder. At least 95 vol. % of the metallic binder is made of nickel, and the hardness of the composite is less than 800 HV10.

Abstract: A tool for machining materials has a main part and one or more blades. The main part is made of a low-alloy steel. The socket is welded to the main part, and the blade edges are made of a hard metal. The hard metal contains at least 82 vol. % of tungsten carbide and a metallic binder made of a cobalt-nickel-based alloy. The hardness of the hard metal is greater than 1350 HV10. The socket has a sintered composite, and 40 vol. % to 60 vol. % of the composite is composed of a metal carbide and a metallic binder. At least 95 vol. % of the metallic binder is made of nickel, and the hardness of the composite is less than 800 HV10.

Abstract: The invention relates to a method for the production of a component having soft-magnetic properties, from an SMC powder, comprising the steps of filling the SMC powder into a powder press (1), pressing the SMC powder to form the component, removing the component from the powder press (1), if necessary reworking the component. Pressing the SMC powder to form the component is carried out at a temperature between 300° C. and 650° C.

Abstract: A friction stir welding tool includes a rotation-symmetrical shaft having a proximal end, a distal end, and a pin, which is arranged concentrically about the rotation axis and which has a smaller diameter than the shaft at the proximal end thereof, and thus projects as compared to a shoulder region of the shaft. The shaft, at least in the shoulder region, and the pin each consists of a high-temperature-resistant metal or an alloy thereof. The pin and/or the shaft in the shoulder region consist of or are coated by a composite material, which substantially consists of molybdenum, tungsten, niobium or tantalum or an alloy of at least one of these metals, and a reinforcement phase embedded therein and consisting of at least one material having a Mohs hardness >6, a micrometer particle size, and a free enthalpy of formation at 1300 K of less than ?350 kJ/mol O2.

Abstract: An iron-carbon master alloy is described, with a C content of 0.3 to 8 wt % and an upper limit of alloying metals Ni<10 wt %, P<4 wt %, Cr<5 wt %, preferably<1 wt %, Mn<5 wt %, preferably<1 wt %, Mo<3 wt %, W<3 wt %, Cu<1 wt %, a particle size of >20 ?m and a hardness of <350 HV 0.01, and a method for the manufacture of said master alloy.