Produits et services

Steel; Steel rods; Plated steel; Blocks (Metal -) for construction; Steel building materials; Clad steel plates and sheets; Building castings of metal; Building castings of metal alloys; Foundry moulds of metal; Molds of metal for casting ceramic materials; Steel castings [semi-finished]; Stainless steel; Bright steel; Galvanized steel sheets; Galvanized steel plate; Rerolled steel; Metals; Alloys of metal; Niches (Metal -); Sheets of metal including those from alloy steel and titanium; Steel fabrications; Steel, unwrought or semi-wrought; Steel sheets; Rolled steel; Wire rope. Mechanical tools; Linking mechanisms [parts of machines]; Industrial robots for working metal; Converters for steelworks; Machinery for shaping metal; Metalworking machines; Tool bits for metalworking machines; Metalworking machine tools; Squaring machines; Finishing machines; Industrial robots for use in manufacture; Industrial robots for shaping metal; Robotic mechanisms for shaping metal; Robotic mechanisms for working metal; Robots for welding.

Produits et services

Steel; Steel rods; Plated steel; Blocks (Metal -) for construction; Steel building materials; Clad steel plates and sheets; Building castings of metal; Building castings of metal alloys; Foundry moulds of metal; Molds of metal for casting ceramic materials; Steel castings [semi-finished]; Stainless steel; Bright steel; Galvanized steel sheets; Galvanized steel plate; Rerolled steel; Metals; Alloys of metal; Niches (Metal -); Sheets of metal including those from alloy steel and titanium; Steel fabrications; Steel, unwrought or semi-wrought; Steel sheets; Rolled steel; Wire rope. Mechanical tools; Linking mechanisms [parts of machines]; Industrial robots for working metal; Converters for steelworks; Machinery for shaping metal; Metalworking machines; Tool bits for metalworking machines; Metalworking machine tools; Squaring machines; Finishing machines; Industrial robots for use in manufacture; Industrial robots for shaping metal; Robotic mechanisms for shaping metal; Robotic mechanisms for working metal; Robots for welding.

Abrégé

An item (1) and a method of manufacturing such item, the item comprising: a steel substrate (2) having a surface (3), the surface (3) being provided with a plurality of micromechanical locking units for creating a micromechanical lock with another object when the micromechanical locking units are pressed into a surface of another object, the micromechanical locking unit comprising: a dimple (6) surrounded by a ridge (7), wherein the angle of the surface of the dimple medially between the bottom of the dimple (6) and the top of the ridge (7) is between 30 and 75° relative to the surface (3), preferably between 45 and 70°.

Classes IPC  ?

• F16B 2/00 - Attaches à serrage par friction largables
• F16B 43/00 - Rondelles ou dispositifs équivalentsAutres dispositifs de support pour têtes de boulons ou d'écrous

Abrégé

Disclosed herein is a process for the manufacture of a stainless steel object having a surface modified with chromium, comprising the steps of providing a stainless steel object comprising 12-25% by weight chromium, 2-25 % by weight nickel, 0-4% by weight molybdenum, 0.1% by weight or less carbon, and to 100% by weight iron; enriching a surface layer of the stainless steel object in chromium by a thermochemical surface treatment; treating the stainless steel object having a surface enriched in chromium at a temperature of 900°C to 1180°C in an inert atmosphere or vacuum; and subsequently, quenching the stainless steel object at a cooling rate of 0.5°C/s to 50°C/s to a temperature of 500 °C or less. The surface-modified stainless steel objects obtained by the process shows high corrosion resistance.

Classes IPC  ?

• C23C 10/06 - Diffusion à l'état solide uniquement d'éléments métalliques ou de silicium dans la couche superficielle de matériaux métalliques au moyen de gaz
• C23C 10/08 - Diffusion d'un seul élément
• C23C 10/10 - Chromisation
• C23C 10/12 - Chromisation de la couche superficielle de matériaux ferreux
• C23C 10/18 - Diffusion à l'état solide uniquement d'éléments métalliques ou de silicium dans la couche superficielle de matériaux métalliques au moyen de liquides, p. ex. au moyen de bains de sels, de suspensions dans des liquides
• C23C 10/20 - Diffusion d'un seul élément
• C23C 10/24 - Bain de sels contenant l'élément à diffuser
• C23C 10/32 - Diffusion de chrome
• C23C 10/34 - Enfouissement dans un mélange de poudres, c.-à-d. cémentation en caisse
• C23C 10/36 - Diffusion d'un seul élément
• C23C 10/38 - Chromisation
• C23C 10/40 - Chromisation de la couche superficielle de matériaux ferreux
• C23C 10/42 - Chromisation de la couche superficielle de matériaux ferreux en présence d'additifs de transport volatils, p. ex. en présence de produits halogénés
• C23C 10/60 - Post-traitement