Production method for deep drawing high-carbon steel wire rod

Abstract

The invention relates to a production method for a deep drawing high-carbon steel wire rod. Steel comprises the following chemical components of 0.69-1.02% of C, 0.15-0.35% of Si, 0.40-0.90% of Mn, less than or equal to 0.35% of Cr, less than or equal to 0.025% of P, less than or equal to 0.025% of S and the balance iron and inevitable impurities. Special casting powder and a large-chamfer crystallizer are adopted for continuous casting, high temperature is adopted for high-speed wire heating, the heat preservation time is controlled, the burning loss of the surface of a steel billet in a heating furnace is increased by adopting oxidizing atmosphere, and network cementite on the surface of the wire rod is smaller than or equal to 0.5 grade.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a method for controlling reticular cementite on the surface of deep-drawn high-carbon steel wire rods. Background technique [0002] High-carbon wire rods for deep drawing are widely used in the fields of cords, aluminum-clad steel, steel strands, bridge cables, etc. Generally, wire rods are required to have good drawing performance. People generally pay attention to how to control the central segregation of the wire rod and the network cementite in the center of the wire rod, while ignoring the control of the surface network cementite. From many years of experience in producing high-carbon wire rods, the reticular cementite or carbide particles on the surface of the wire rod caused by the carburization on the surface of the slab will have an important impact on the drawing of high-carbon wire rods, resulting in the occurrence of wire rods in the drawing process. break, resultin...

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Problems solved by technology

From many years of experience in producing high-carbon wire rods, the reticular cementite or carbide particles on the surface of the wire rod caused by the carburization on the surface of the slab will have an important impact on the drawing of high-carbon wire rods, resulting in the occurrence of wire rods in the drawing process. break, resulting in huge economic losses

The general method of controlling the carburization of the slab is to reduce the fluctuation of the liquid level to control the source of the carburization, or to carry out deep grinding on the surface of the billet, but it is still impossible to eradicate the reticular cementite on the surface of the wire rod, and the process cost is high

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