摘要:
The invention relates to a method for producing a component from transformable steel by hot forming, in which a plate first is cut out of a strip or sheet as the pre-material, and is then heated to forming temperature and pre-formed, having an at least partially martensitic transformation structure after forming. Instead of a press mould hardening, the at least partially martensitic transformation structure is created in the pre-material, or in the plate to be formed, by austenitisation and quenching already before forming, and then the thus-conditioned plate is reheated after forming, while maintaining the at least partially martensitic transformation structure, to a temperature below the Ac 1 transformation temperature, and formed at this temperature.
摘要:
The invention relates to a zinc-based anti-corrosion coating for steel sheets or steel strips, which for the purpose of hardening are at least in parts heated to a temperature above Ac3 and then cooled at a temperature situated at least partially above the critical cooling speed, the anti-corrosion coating being a coating applied by hot dipping. In addition to at least 75% by weight zinc and possible unavoidable impurities, the coating also contains 0.5 to 15.0 % by weight manganese and 0.1 to 10.0 % by weight aluminium.
摘要:
The invention relates to a deformation-hardened component made of galvanized steel, a method for producing a steel strip that is suitable for the deformation-hardening of components and a method for the production of a deformation-hardened component made of this steel strip. The deformation-hardened component made of galvanized steel, wherein first a plate is cut from a steel strip or steel sheet coated with zinc or a zinc-based alloy, subsequently heated to a deformation temperature above Ac3 and deformed and also hardened, having an at least partly martensitic transformation structure after having been shaped, wherein the steel has the following chemical composition in wt. %: C: 0.10 - 0.50, Si: 0.01 - 0.50, Mn: 0.50 - 2.50, P
摘要:
The invention relates to a component made of press-form-hardened, aluminium-based coated steel sheet, the coating having a covering which contains aluminum and silicon applied in the hot-dip process, characterized in that the press-form-hardened component in the transition region between steel sheet and covering has an inter-diffusion zone I, wherein, depending on the layer application of the covering before heating and press hardening, the thickness of the inter-diffusion zone I obeys the following formula: I [µm] 2 ] + (19/7), on the inter-diffusion zone I there is formed a zone having various intermetallic phases having an average total thickness between 8 and 50 µm, on which zone there is in turn arranged a covering layer containing aluminum oxide and/or hydroxide having an average thickness of at least 0.05 µm to at most 5 µm. The invention further relates to a method for producing the aforementioned component.