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Anti-seismic fire-resistant steel plate with thickness being 100 mm and yield strength being 460 MPa grade and manufacturing method thereof

A yield strength and refractory technology, applied in the field of alloy steel manufacturing, can solve problems such as expensive costs, and achieve the effects of improving hardenability, reducing costs, and reducing temper brittleness

Inactive Publication Date: 2021-03-16
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional refractory steel is designed with a high Mo (generally not less than 0.5Wt.%) composition, and the strong high-temperature solid-solution strengthening effect of the Mo element is used to meet the loss of its high-temperature strength. However, the Mo element is relatively expensive and makes the cost of the steel greatly increase

Method used

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  • Anti-seismic fire-resistant steel plate with thickness being 100 mm and yield strength being 460 MPa grade and manufacturing method thereof
  • Anti-seismic fire-resistant steel plate with thickness being 100 mm and yield strength being 460 MPa grade and manufacturing method thereof
  • Anti-seismic fire-resistant steel plate with thickness being 100 mm and yield strength being 460 MPa grade and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A 100mm-thick anti-seismic fire-resistant steel plate with a yield strength of 460MPa, the mass percentage of each element in its chemical composition is: C: 0.065%, Si: 0.15%, Mn: 1.58%, P: 0.014%, S: 0.008%, Cr: 0.46% , Mo: 0.17%, Nb: 0.086%, V: 0.02%, Ti: 0.015%, Al: 0.028%, N: 0.005%. The balance is Fe and unavoidable impurity elements. Its manufacturing method comprises the following process steps:

[0029](1) Through the converter smelting process, the refining process outside the furnace, and the molten steel pouring continuous casting billet process, pouring into a billet with a thickness of 320mm and a length of 3000mm, the chemical composition of the billet is: C: 0.065%, Si: 0.15%, Mn : 1.58%, P: 0.014%, S: 0.008%, Cr: 0.46%, Mo: 0.17%, Nb: 0.086%, V: 0.02%, Ti: 0.015%, Al: 0.028%, N: 0.005%, the rest For Fe and inevitable impurity elements.

[0030] (2) Heating process of the slab heating furnace: the heating temperature is 1140°C, and the furnace time is...

Embodiment 2

[0034] A 100mm-thick anti-seismic fire-resistant steel plate with a yield strength of 460MPa, the mass percentage of each element in its chemical composition is: C: 0.089%, Si: 0.25%, Mn: 1.21%, P: 0.012%, S: 0.009%, Cr: 0.34% , Mo: 0.15%, Nb: 0.068%, V: 0.03%, Ti: 0.022%, Al: 0.035%, N: 0.004%. The balance is Fe and unavoidable impurity elements. Its manufacturing method comprises the following process steps:

[0035] (1) Through the converter smelting process, the refining process outside the furnace, and the molten steel pouring continuous casting billet process, pouring into a billet with a thickness of 320mm and a length of 3000mm, the chemical composition of the billet is: C: 0.089%, Si: 0.25%, Mn : 1.21%, P: 0.012%, S: 0.009%, Cr: 0.34%, Mo: 0.15%, Nb: 0.068%, V: 0.03%, Ti: 0.022%, Al: 0.035%, N: 0.004%, the rest For Fe and inevitable impurity elements.

[0036] (2) Heating process of the slab heating furnace: the heating temperature is 1160°C, and the furnace time i...

Embodiment 3

[0040] A 100mm-thick anti-seismic fire-resistant steel plate with a yield strength of 460MPa, the mass percentage of each element in its chemical composition is: C: 0.110%, Si: 0.38%, Mn: 0.95%, P: 0.011%, S: 0.007%, Cr: 0.65% , Mo: 0.20%, Nb: 0.092%, V: 0.015%, Ti: 0.028%, Al: 0.018%, N: 0.004%. The balance is Fe and unavoidable impurity elements. Its manufacturing method comprises the following process steps:

[0041] (1) Through the converter smelting process, the refining process outside the furnace, and the molten steel pouring continuous casting billet process, pouring into a billet with a thickness of 320 mm and a length of 3000 mm, the chemical composition of the billet is: C: 0.110%, Si: 0.38%, Mn: 0.95%, P: 0.011%, S: 0.007%, Cr: 0.65%, Mo: 0.21%, Nb: 0.099%, V: 0.015%, Ti: 0.028%, Al: 0.018%, N: 0.004%, The rest is Fe and unavoidable impurity elements.

[0042] (2) Heating process of the slab heating furnace: the heating temperature is 1180°C, and the furnace tim...

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Abstract

The invention discloses an anti-seismic fire-resistant steel plate with the thickness being 100mm and the yield strength being the 460MPa grade and a manufacturing method thereof. The anti-seismic fire-resistant steel plate is characterized by comprising, by weight, 0.06-0.12% of C, 0.10-0.50% of Si, 0.90-1.60% of Mn, smaller than 0.015% of P, smaller than 0.01% of S, 0.20%-0.70% of Cr, 0.15-0.22%of Mo, 0.065-0.110% of Nb, 0.015%-0.045% of V, 0.01%-0.04% of Ti, 0.01%-0.04% of Al, smaller than 0.0060% of N and the balance Fe and inevitable impurity elements. The low-molybdenum and high-niobiumcomponent design thought is adopted, the cost of steel is effectively reduced through the low-molybdenum design, and the high-temperature performance is improved through precipitation strengthening of niobium at the high temperature; meanwhile, a certain number of bainite structures are generated by the steel through the means of controlled rolling and controlled cooling, and the high-temperaturestrength of the steel is regulated and controlled through the good high-temperature performance of bainite; and the rolling mode is hot rolling, the production cost is reduced, and great applicationprospects and economic benefits are achieved.

Description

technical field [0001] The invention relates to an anti-seismic refractory steel plate and a manufacturing method thereof, in particular to a hot-rolled anti-shock refractory steel plate with a thickness of 100 mm and a yield strength of 460 MPa and a production method thereof, belonging to the technical field of alloy steel manufacturing. Background technique [0002] In recent years, the construction of super high-rise and long-span steel structure buildings in my country has entered a period of rapid development. With the increasing height and span of steel structure buildings, higher requirements have been put forward for the strength and thickness of building structural steel. , the Q345MPa grade steel plate commonly used in the past can no longer meet the development needs of steel structure buildings. With the vigorous development of steel structure buildings, it has greatly promoted the development of steel for building structures in the direction of high strength and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/38C22C38/22C22C38/26C22C38/24C22C38/28C22C38/06C22C33/04C21D8/02B21B1/28B21B37/56B21B37/74B21B45/02
CPCC22C38/02C22C38/04C22C38/38C22C38/22C22C38/26C22C38/24C22C38/28C22C38/06C22C38/001C22C33/04C21D8/0226C21D8/0205B21B1/28B21B45/0203B21B37/74B21B37/56C21D2211/002C21D2211/005
Inventor 孟令明崔强王军陈林恒邓伟刘涛唐春霞
Owner NANJING IRON & STEEL CO LTD
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