High-carbon steel wire rod inclusion control method

Abstract

The invention provides a high-carbon steel wire rod inclusion control method. The method comprises converter treatment, refining, continuous casting, continuous rolling and wire rod rolling. In converter treatment, high-carbon steel is produced and after converter treatment, silicomanganese deoxidation is carried out. A LF refining temperature is in a range of 1550-1640 DEG C, refining time is in a range of 60-80min, sulfur content of a steel liquid at the refining finished point is in a range of 0.016-0.025%, oxygen activity is in a range of (10-30)*10<-6>, steel liquid acid-insoluble aluminum content is in a range of 0.0005-0.0025% and titanium content is less than or equal to 0.0010%. In continuous rolling and wire rod rolling, the steel wire rod diameter is in a range of 5-5.5mm, a spinning temperature is in a range of 880-910 DEG C and after spinning, a steel wire rod is fast cooled to 600-650 DEG C. The high-carbon steel wire rod obtained by the method contains fine oxide impurities. In steel wire rod drawing, the sulfide inclusion outside the oxide inclusion can cooperate with matrix deformation so that micro-cracks at two ends of the oxide impurity are prevented and finished product processing performances are improved.

Description

technical field [0001] The invention belongs to the field of high-carbon steel, and in particular relates to a method for controlling inclusions of high-carbon steel wire rods. Background technique [0002] With the rapid development of the automobile and other equipment manufacturing industries, and for weight reduction and safety considerations, wire products show an obvious trend of high strengthening. At present, the single filament strength can reach up to 4000MPa or more, but to obtain such a high strength, in addition to carrying out In addition to the composition adjustment, higher requirements are also placed on the processing performance of the wire rod. In order to improve the processing performance of high-carbon steel wire rod, the most common method is to take measures to refine the structure of the wire rod and modify the non-metallic inclusions in the steel to improve the deformability of the inclusions. In terms of inclusion control in high carbon steel for...

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Problems solved by technology

In order to improve the processing performance of high-carbon steel, the invention has done work on the control of the structure of the wire rod and the control of inclusions, and it is mentioned that the control of the sulfide spacing is beneficial to the processing performance of the wire rod, but the invention obviously does not mention How to control the hazards of oxide inclusions, if there are oxide inclusions with large size and poor deformability in steel, it will inevitably greatly damage the processing performance of high carbon steel wire rods

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