Method for producing flat steel product having aluminum-based anti-corrosion coating and flat steel product having aluminum-based anti-corrosion coating

• Main Authors: BANIK JANKO, SCHROOTEN AXEL RALPH, ROSENSTOCK DIRK
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

The invention relates to a method for producing a flat steel product (9) having a pre-alloyed anti-corrosion coating (13), comprising at least the following steps: providing a coated flat steel product (9) comprising a steel substrate (11) having an anti-corrosion coating (13) based on aluminum at least on one side of the steel substrate (11); -heat treating the coated flat steel product (9), comprising the following steps: i. Heating the coated flat steel product (9) in a furnace at a furnace temperature T of between 950 DEG C and 1150 DEG C and an in-furnace residence time tv of between 40 s and 150 s, the furnace temperature being selected such that the heating rate of the coated flat steel product (9) in the temperature range of 500 DEG C to 700 DEG C exceeds 10 K/s; ii. Holding the coated flat steel product (9) at a temperature above Ac3 for a time between 20 s and 60 s. 本发明涉及一种用于生产具有预合金化防腐蚀覆层(13)的扁钢产品(9)的方法，其至少包括以下步骤：-提供涂层的扁钢产品(9)，其包括钢基材(11)，该钢基材具有至少存在于该钢基材(11)的一侧的铝基防腐蚀覆层(13)；-对该涂层的扁钢产品(9)进行热处理，包括以下分步：i