Corrosion-resistant and fire-resistant steel with excellent high-temperature creep property under uniaxial tension and production method of corrosion-resistant and fire-resistant steel

Abstract

The invention relates to corrosion-resistant fire-resistant steel with excellent high-temperature creep property under uniaxial stretching and a production method thereof, the fire-resistant steel comprises the following elements in percentage by mass: 0.015 to 0.052 percent of C, 0.05 to 0.15 percent of Si, 1.60 to 1.81 percent of Mn, less than or equal to 0.002 percent of P, less than or equal to 0.001 percent of S, 0.34 to 0.48 percent of Mo, 0.27 to 0.43 percent of Cr, 0.26 to 0.37 percent of Cu, 0.67 to 0.84 percent of Ni, 0.047 to 0.062 percent of Nb, 0.054 to 0.072 percent of V, 0.0007 to 0.0017 percent of Mg, 0.0005 to 0.0014 percent of Hf, 0.0012 to 0.0018 percent of [O], less than or equal to 0.0020 percent of [N], less than or equal to 0.001 percent of As, less than The production method comprises the steps of converter smelting, external refining, casting blank heating, controlled rolling, laminar cooling and tempering treatment, the manufacturing process is simple, the production period is short, large-scale implementation is easy to achieve in various metallurgical enterprises, and the finished steel plate has the advantages of being high in strength and toughness, high in weather resistance, excellent in high-temperature creep property and the like.

Description

technical field [0001] The invention relates to the technical field of metal material manufacturing, in particular to a corrosion-resistant refractory steel with excellent high-temperature creep properties under uniaxial stretching and a production method thereof. Background technique [0002] In recent years, the safety of steel structure engineering in high-rise buildings and other fields under fire has been paid more and more attention. In addition to the conventional performance of steel, special performance requirements such as fire resistance, disaster resistance and corrosion resistance are also put forward to reduce the occurrence of fire. Casualties and property losses require steel with excellent high-temperature creep properties and corrosion resistance, which can not only reduce the thickness of fire-retardant coatings and weather-resistant coatings, but also improve resource and energy efficiency. [0003] 本发明前,中国发明专利申请201310160484.1、201310033300.5、201110080774....

AI Technical Summary

Problems solved by technology

Another Chinese invention patent 202110945932.3 discloses a high-performance corrosion-resistant and fire-resistant steel with excellent low-temperature toughness at -80°C and its production method. The invented product has high strength, excellent low-temperature toughness, fire resistance and weather resistance, and good welding performance and cold working performance, but the invention product contains more precious alloys such as Mo, Cr, Ni, etc., it is not easy to implement on a large scale, and there is no requirement for high temperature creep performance

Images