Copper-containing steel heating method and copper-containing steel produced by the same

Abstract

The invention discloses a heating method for copper-containing steel and the copper-containing steel produced therefrom. It can not only satisfy the production of plate-type copper-containing steel, but also meet the heating method of copper-containing steel for the production of profile-type copper-containing steel. The copper-containing steel heating method adopts a heating method of heating twice, the first step: heating the steel slab or cast slab of the copper-containing steel to 1000-1050 °C; the second step: heating for the second time in 30-90 minutes, The maximum temperature of the second heating is 1250-1290°C; during the two heating processes, the heating temperature of the billet or cast slab at each time point is not lower than the previous time point. The production of copper-containing steel of plate type can be satisfied, and the production of copper-containing steel of profile type can be satisfied; the copper-containing steel produced by this method has no cracks and cracking defects after rolling, and the product is qualified, especially for large-scale Production of copper-containing steel for profiles.

Description

technical field [0001] The invention relates to a heating method for copper-containing steel and the copper-containing steel produced therefrom. Background technique [0002] At present, copper-containing steel includes Cu-P weathering steel, Cu-P-Cr-Ni weathering steel, etc. Copper-containing steel usually has good atmospheric corrosion resistance and is widely used in construction, vehicle and container industries. In metallurgical production, during the heating process of copper-containing steel, due to the result of selective oxidation (the iron in the steel is selectively oxidized, and the copper is not oxidized), a thin layer will be enriched under the iron oxide skin of the steel with a melting point lower than 1100 °C When it melts and erodes the grain boundaries on the steel surface, it causes the copper-containing steel to crack during hot working. [0003] In order to avoid cracking of copper-containing steel, the heating process that reduces the maximum heating ...

AI Technical Summary

Problems solved by technology

Profile rolling mills that produce profile-type copper-containing steel often have a small load (compared to plate rolling mills). Rolling profiles at a maximum heating temperature of 1200°C, especially large profiles, is prone to motor tripping or roll breakage

[0006] Therefore, the heating process of the above example is difficult to meet the production of large copper-containing steel profiles.

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