Economical 400mpa level weather-resistant wire rod for studs, production method and studs prepared therefrom

Abstract

The invention provides an economical steel wire rod for a 400MPa-grade weather-proof toggle pin, a production method, and the toggle pin. The steel wire rod is prepared from the following components in percentage by weight: 0.02 percent to 0.06 percent of C, 0.15 percent to 0.25 percent of Si, 0.70 percent to 1.05 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015percent of S, 0.02 percent to 0.06 percent of Al, 0.25 percent to 0.45 percent of Ni, 0.30 percent to 0.60 percent of Cr, 0.20 percent to 0.40 percent of Cu, 0.005 to 0.030 percent of Ti, and the balance Fe and inevitable impurities. The production method comprises the steps of smelting, continuously casting, heating a steel billet, rolling, spinning and cooling. The toggle pin produced by adopting the steel wire rod has remarkable weather resistance, has the yield strength being not lower than 400MPa, and maintains a favorable welding performance at the same time.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an economical 400MPa class weather-resistant wire rod for studs, a production method and the prepared studs. Background technique [0002] Studs are short for arc stud welding cylindrical head welding studs (English Cheese head studs for arc studwelding). It acts as a rigid combined connection and is suitable for high-rise steel structure buildings, industrial plant buildings, roads, railways, bridges, towers, automobiles, energy, transportation facilities, airports, stations, power stations, pipe supports, hoisting machinery and other various Class steel structure and other projects. [0003] The current national standard for studs uses the national standard GB / T10433-2002, which is suitable for shear parts, embedded parts and anchors of various structures in civil engineering. GB / T10433-2002 non-equivalent adopts the international standard ISO13918: 1998 "Studs and ...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of the use of weathering steel materials in recent years, the stud material is facing new problems

After the base metal is replaced by weathering steel, the gap between the corrosion resistance of the base metal and the stud increases. With the prolongation of the service time, the damage will inevitably occur from the joint between the stud and the base metal. If the connection between the stud and the base metal If it is destroyed, the shear force between different connectors cannot be transmitted, which will inevitably lead to the destruction of the entire building structure

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