Hot-rolled section steel for gas cylinder and production method thereof

Abstract

The invention belongs to the field of steel production and relates to hot rolled steel section for gas cylinders and a production method thereof. The technical problem to be solved by the invention is to provide the hot rolled steel section for gas cylinders and improve the quality and comprehensive mechanical performance of hot rolled steel section for gas cylinders. The hot rolled steel sectionfor gas cylinders comprises the following components in percentage by weight: 0.25 to 0.32 percent of C, 0.15 to 0.35 percent of Si, 0.40 to 0.60 percent of Mn, 0.8 to 1.05 percent of Cr, 0.15 to 0.25 percent of Mo, 0.02 to 0.04 percent of Al, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.020 percent of P and S, less than or equal to 0.2 percent of Ni, less than or equal to 0.15 percent of Cu, less than or equal to 0.015 percent of Sn, less than or equal to 0.015 percent of As, less than or equal to 0.0002 percent of H, less than or equal to 0.009 percent of N, less than or equal to 0.0020 percent of T[O], and the balance of Fe. The steel disclosed by the invention can achieve high and stable comprehensive mechanical performance through simple tempering heat treatment.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a hot-rolled section steel for gas cylinders and a production method thereof. Background technique [0002] Steel seamless gas cylinders are widely used in chemical industry, metallurgy, machinery, medical treatment, construction, military industry, automobile and other industries, especially the service conditions of gas cylinders in military industry, automobile and other industries are harsh. Working in the temperature range of ~60°C, frequent filling and moving of various gases, the safety requirements are extremely high. Steel cylinders made of common CrMo steel barely meet the requirements for the use of gas cylinders, but the impact toughness, especially low-temperature impact performance, is low and fluctuates greatly, seriously endangering the safety of gas cylinders. [0003] GB24160 "Compressed Natural Gas Cylinders for Vehicles with Steel Liner Circumferential W...

AI Technical Summary

Problems solved by technology

The C, Si, Mn, Cr, Mo, P, and S of the steel disclosed in this patent are completely different from those of the present invention, and 0.01-0.03% of Ti is added in this invention, which is smelted in an electric furnace, which has low efficiency and high cost

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