A production method of wear-resistant, low-temperature and atmospheric corrosion-resistant steel

Abstract

The invention provides a production method for wear-resistant low temperature-resistant weather-resistant steel. Steel with steel coil thickness of 2.5 to 16.0 mm is produced and comprises 0.065 to 0.085% of C, 0.20 to 0.30% of Si, 0.85 to 0.950% of Mn, no more than 0.020% of P, no more than 0.004% of S, 0. 45 to 0.55% of Cr, 0.12 to 0.25% of Ni, 0.25 to 0.35% of Cu, 0.010 to 0.030% of Nb, 0.020 to 0.040% of Al, 0.010 to 0.018% of Ti, 0.0015 to 0.0030% of Ca and no more than 0.0045% of N. During rolling, the furnace box temperature of a heating furnace is set to be 1200 + / - 20 DEG C, the temperature of a slab is maintained for 30 to 40 min, the tapping temperature of the slab is 1200 + / - 20 DEG C, the temperature of an intermediate slab in a finish rolling mill is 900 to 1000 DEG C, the thickness of the intermediate slab in the finish rolling mill is no less than 50 mm, finishing temperature is 860 + / - 10 DEG C, rolling temperature is 600 + / - 10 DEG C, and a laminar cooling speed is 15 + / - 12 DEG C / s.

Description

technical field [0001] The invention relates to the production of corroded steel, especially the method is suitable for the production of welded structure weather-resistant steel in cold regions. Background technique [0002] In the 1930s, the U.S.Steel company in the United States first successfully developed corrosion-resistant high-strength copper-containing low-alloy steel for use in buildings and bridges. A series of welded structural steels mainly alloyed with chromium, manganese and copper. Around 1960, WISCO made use of the copper contained in its iron ore, and first carried out research and development of copper-containing weathering steel in China. In 1965, 09MnCuPTi weathering steel was trial-produced, and my country's first weathering steel road truck was developed. In addition, researchers have also developed the 08CuPVRE series of Anshan Iron and Steel Group, the 09CuPTi series of Wuhan Iron and Steel Group, and the 09MnNb of Jinan Iron and Steel Company in c...

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Problems solved by technology

In addition, researchers have also developed the 08CuPVRE series of Anshan Iron and Steel Group, the 09CuPTi series of Wuhan Iron and Steel Group, and the 09MnNb of Jinan Iron and Steel Company in combination with my country's resource advantages. So far, my country has successfully developed two series of welded structure weather resistance and high weather resistance 11 grades (including 4 with high weather resistance and 7 with welded structure), but the welded structure used in the Gobi Desert's windy and sandy environment is low temperature resistant, wear-resistant (gravel-resistant and wear-resistant), and saline-alkali resistant. Weathering steel production information has not been disclosed