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High-strength fire-resistant corrosion-resistant building steel and manufacturing method thereof

A technology of construction steel and manufacturing method, which is applied in the field of construction steel to achieve the effect of improving high temperature yield strength

Active Publication Date: 2019-10-18
YANCHENG LIANXIN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned problems of current fire-resistant and corrosion-resistant steel, the present invention provides a high-strength fire-resistant and corrosion-resistant construction steel and its manufacturing method

Method used

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  • High-strength fire-resistant corrosion-resistant building steel and manufacturing method thereof
  • High-strength fire-resistant corrosion-resistant building steel and manufacturing method thereof
  • High-strength fire-resistant corrosion-resistant building steel and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0064] Chemical composition: C: 0.12%; Si: 0.20%; Mn: 1.0%; P: 0.02%; S: 0.001%; ​​Mo: 0.10%; V: 0.04%; Cr: 0.30; Ni: 0.01%; Cu: 0.20 %; B: 0.001%; ​​W: 0.02%; Al: 0.01%; N: 0.01%; Sn: 0.03%; Ce: 0.018%;

[0065] Preheat the mixture of Mo, V, Cr, Ni, Cu, B, W, Al, Sn and Ce to 850°C in the preheating furnace, add the above preheated mixture when the temperature of the LF furnace is 1650°C, and then Carry out continuous casting. After the continuous casting is completed, the billet is heated to 1300°C and held for 110 minutes. The hot rolling start temperature is 1250°C, and the final rolling temperature is 950°C. After the hot rolling is completed, the cooling rate is 25°C / s. °C, then air cooled to room temperature.

Embodiment 1-2

[0067] Chemical composition: C: 0.12%; Si: 0.20%; Mn: 1.0%; P: 0.02%; S: 0.001%; ​​Mo: 0.10%; V: 0.04%; Cr: 0.30; Ni: 0.01%; Cu: 0.20 %; B: 0.001%; ​​W: 0.02%; Al: 0.01%; N: 0.01%; Sn: 0.03%; Ce: 0.018%;

[0068] Preheat the mixture of Mo, V, Cr, Ni, Cu, B, W, Al, Sn and Ce to 750°C in the preheating furnace, add the above preheated mixture when the temperature of the LF furnace is 1600°C, and then Carry out continuous casting. After the continuous casting is completed, the billet is heated to 1100°C and held for 150 minutes. The hot rolling start temperature is 1050°C, and the final rolling temperature is 900°C. After the hot rolling is completed, the cooling rate is 15°C / s. °C, then air cooled to room temperature.

Embodiment 1-3

[0070] Chemical composition: C: 0.12%; Si: 0.20%; Mn: 1.0%; P: 0.02%; S: 0.001%; ​​Mo: 0.10%; V: 0.04%; Cr: 0.30; Ni: 0.01%; Cu: 0.20 %; B: 0.001%; ​​W: 0.02%; Al: 0.01%; N: 0.01%; Sn: 0.03%; Ce: 0.018%;

[0071] Preheat the mixture of Mo, V, Cr, Ni, Cu, B, W, Al, Sn and Ce to 800°C in the preheating furnace, add the above preheated mixture when the temperature of the LF furnace is 1620°C, and then Carry out continuous casting. After the continuous casting is completed, the billet is heated to 1200°C and held for 130 minutes. The hot rolling start temperature is 1150°C, and the final rolling temperature is 925°C. After the hot rolling is completed, the cooling rate is 20°C / s. °C, then air cooled to room temperature.

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Abstract

The invention relates to high-strength fire-resistant corrosion-resistant building steel and a manufacturing method thereof. The high-strength fire-resistant corrosion-resistant building steel contains the components of, in percentage by weight, 0.12-0.18% of C, 0.2-0.6% of Si, 1.0-1.8% of Mn, 0.02-0.08% of P, less than or equal to 0.002% of S, 0.10-0.30% of Mo, 0.30-0.50% of Cr, 0.01-0.03% of Ni,0.20-0.40% of Cu, 0.001-0.002% of B, 0.02-0.05% of W, 0.01-0.04% of Al, and less than or equal to 0.02% of N; and also contains one or more than one of Nb, V and Ti, and the sum of Nb, V and Ti is larger than or equal to 0.04% and less than or equal to 0.10%, one or more than one of Sb, Sn, Ce, Zn and Mg, and the balance Fe. The manufacturing method comprises the following steps of pretreatment of molten iron, electric furnace smelting, LF refining, continuous casting, billet heating, cogging, rolling and controlled cooling.

Description

technical field [0001] The invention belongs to the technical field of building steel, and in particular relates to a high-strength fire-resistant and corrosion-resistant building steel and a manufacturing method thereof. Background technique [0002] The steel structure has the characteristics of high strength, light weight, good plasticity and toughness, and fast construction. It is suitable for various engineering structures. In recent years, with the steady growth of steel production and the deepening of global application technology research, steel structures have been more and more widely used in the construction industry, especially in super high-rise and long-span buildings. However, with the development of steel structure buildings, the problem of fire prevention and corrosion protection has become increasingly prominent. At present, some domestic enterprises have developed fire-resistant and weather-resistant steel, such as: [0003] Chinese patent application CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/60C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0263C21D2211/002C21D2211/005C22C33/04C22C38/001C22C38/002C22C38/005C22C38/008C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/60
Inventor 王长城谢锦官陈春荣
Owner YANCHENG LIANXIN IRON & STEEL CO LTD
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