Steel adapting to high deformation and punching and used for high-surface-quality aluminum-coated substrates and production method thereof

Abstract

The invention discloses steel adapting to high deformation and punching and used for high-surface-quality aluminum-coated substrates and a production method thereof. The steel comprises the followingchemical components of, by weight, percentage, no more than 0.01% of C, 0.006-0.015% of Si, 0.05-0.3% of Mn, no more than 0.015% of P, no more than 0.01% of S, no more than 0.005% of Al, no more than0.005% of N, 0-0.05% of Ti, 0.01-0.08% of O, and the balance of Fe and inevitable impurities; and meanwhile, C+N is not more than 0.012, Mn / S is not less than 8, and Ti / (3.42N+4C) is not less than 1.The tensile strength of the steel for the aluminum-coated substrates is 280-380 MPa; and the ductility is above 40%; the steel components adopt low C-Si-Mn design similar to pure iron; a proper amountof Ti is added; the steel is produced by adopting a rolling control mode; the production process is simple; and the cost is lower. Besides of excellent plasticity and steel aluminum coating performance, the steel can meet single-pass high deformation (80-90%) requirement; and the steel is mainly used for producing aluminum-coated plate strips.

Description

technical field [0001] The invention belongs to the field of ultra-low-carbon steel manufacturing, and in particular relates to a high-surface-quality aluminum-clad substrate steel suitable for large deformation and stamping processing and a production method thereof. Background technique [0002] With the development of technology and economy, the performance requirements of metal materials are getting higher and higher, and it is often difficult for a single composition of metal materials to meet the performance requirements of multiple aspects in the actual use process at the same time. Selecting two or more metal materials and using various processes to make composite panels can meet special comprehensive performance requirements. Aluminum-clad steel is a composite strip with aluminum on the surface and steel on the core layer by rolling the aluminum film on the surface of the strip at room temperature. It has the strength of steel and the good heat dissipation and corro...

AI Technical Summary

Problems solved by technology

The aluminum-clad panels used in the fields of home appliance panels, auto parts, food processing trays, etc. not only require good steel-aluminum bonding strength, but also require excellent stamping performance and high surface quality, especially the latter two requirements, the current cladding Aluminum products are difficult to meet

[0003] Chinese patent number CN102019727 discloses "aluminum-clad steel strip for coolers and its preparation method, and the steel strip and aluminum alloy strip used therein", which introduces the method and process for producing composite strips, although the substrate used is mentioned, but It is mainly used to produce thicker aluminum-clad strip steel, with insufficient plastic deformation capacity, difficult to meet large deformation requirements (deformation does not exceed 70%), and poor surface quality

[0008] From the comparison with the existing patents, it can be found that the single-pass deformation of the existing aluminum-clad steel products is generally below 70%, and there are problems of uneven strain on the surface and banded streaks, which cannot be stamped; while low-yield steel products Although it has excellent plasticity and large deformation capacity, it has poor steel-aluminum bonding performance and cannot carry out lamination processing of steel and aluminum.

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