Wire rod for high-strength corrosion-resistant steel strand and production method thereof
A technology of corrosion-resistant steel and production methods, applied in the field of iron and steel metallurgy, can solve problems such as corrosion resistance that has not been raised, and achieve the effects of being beneficial to drawing deformation, improving strength and plasticity, and good strength and plasticity
Active Publication Date: 2019-01-08
ANGANG STEEL CO LTD
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Problems solved by technology
This invention only mentions the steelmaking production process of 82B steel strand, and does not involve the later rolling process, and does not propose related corrosion resistance
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[0030] The chemical composition (wt%) of table 1 embodiment of the present invention and comparative example 82B wire rod
[0031]
[0032] Implementation one:
[0033] According to the invention composition of corrosion-resistant steel strands, it is smelted with wire rods, and then cast into blooms with a cross-sectional size of 280*380mm. The superheat is 28°C. The current intensity of electromagnetic stirring in the crystallizer is 400A, and the current intensity of electromagnetic stirring at the end of solidification is 500A. The 280*380mm bloom is heated and rolled into a steel billet with a section size of 155*155mm, and then the steel billet is inspected and the surface defect position is ground.
[0034] After the above process, a qualified billet is obtained. Rolling on high-speed wire rod mills using qualified billets The rolling process of the wire rod is as follows: heat the billet to 1030°C, hold the temperature for 110 minutes, and the temperature differe...
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Abstract
The invention provides a high-strength corrosion-resistant steel wire rod for a steel strand and a production method of the steel wire rod. The steel wire rod is prepared from, by weight, 0.80%-0.85%of C, 0.15%-0.35% of Si, 0.60%-0.90% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.015% of S, 0.10%-0.20% of Cr, 0.10%-0.20% of Ni, 0.10%-0.20% of Cu, 0.20%-0.30% of Mo and the balance Fe and inevitable impurity elements. The production method comprises the steps of smelting, continuous casting, square-blank continuous rolling, steel blank cleaning and rolling. Accordingto the produced steel wire rod, the strength and plasticity are good, and drawing deformation is promoted. The corrosion speed of the steel wire rod is lower than 70% of the corrosion rate of a steelwire rod for an 82B steel strand under the complete-immersion corrosion testing condition of a (92 h 23 DEG C) 5% NaCl solution.
Description
technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a wire rod for high-strength corrosion-resistant steel strand and a production method thereof. Background technique [0002] In the bridge construction of high-speed railways and highways, prestressed beams have been widely used due to their light weight, large span, comfortable driving, saving steel and concrete, and good durability. However, due to non-refined construction factors such as equipment, personnel, and material technology, a series of durability failure accidents of prestressed concrete structures have occurred in recent decades, among which the damage caused by corrosion of prestressed steel strands accounts for the vast majority. Serious consequences have been caused, which has attracted the attention of scholars and engineering circles all over the world. [0003] The corrosion of prestressed steel strands directly affects the service time of...
Claims
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IPC IPC(8): C22C38/04C22C38/02C22C38/18C22C38/08C22C38/16C22C38/12B22D11/115C21D8/06
Inventor 马立国常宏伟郭大勇王秉喜杨辉张博高航车安李凯孙航
Owner ANGANG STEEL CO LTD