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A kind of ultra-thick gauge hot-rolled H-shaped steel and its production method

A production method and technology for H-beams, which are applied in metal rolling, process efficiency improvement, temperature control, etc., can solve problems such as the need to improve the performance in the thickness direction, achieve excellent comprehensive mechanical properties, promote precipitation and refinement, and improve driving. force effect

Active Publication Date: 2021-09-03
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a super-thick hot-rolled H-shaped steel and its production method to solve the problem that the mechanical properties of the hot-rolled H-shaped steel with a flange thickness of 90 mm to 150 mm, especially the performance in the thickness direction, need to be improved

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  • A kind of ultra-thick gauge hot-rolled H-shaped steel and its production method
  • A kind of ultra-thick gauge hot-rolled H-shaped steel and its production method
  • A kind of ultra-thick gauge hot-rolled H-shaped steel and its production method

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Embodiment Construction

[0026] The ultra-thick gauge hot-rolled H-shaped steel of the present invention has a chemical composition in terms of mass percentage, C: 0.04-0.11, Si: 0.10-0.40, Mn: 0.40-1.00, Cr: 0.40-1.00, Cu: 0.10-0.40, Nb : 0.020~0.060, V: 0.040~0.100, Ti: 0.010~0.025, Al: 0.010~0.030, N: 0.0060~0.0120, P: ≤0.015, S: ≤0.005, O: ≤0.0060, satisfying 0.090%≤Nb+ V+Ti≤0.170% and 6.5≤(V+Ti) / N≤10.5, the rest is Fe and trace residual elements, according to CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu ) / 15, the chemical composition satisfies 0.30%≤CEV≤0.48%.

[0027] Further optionally, the chemical composition is calculated by mass percentage, C: 0.04-0.07, Si: 0.10-0.30, Mn: 0.80-1.00, Cr: 0.40-0.90, Cu: 0.10-0.25, Nb: 0.040-0.060, V: 0.040~0.080, Ti: 0.010~0.015, Al: 0.010~0.020, N: 0.0060~0.0100, P: ≤0.015, S: ≤0.005, O: ≤0.0060, satisfying 0.090%≤Nb+V+Ti≤0.130%, 6.5≤(V+Ti) / N≤8.5, the rest is Fe and trace residual elements, calculated according to CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15, chemical composition ...

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Abstract

The invention discloses an ultra-thick gauge hot-rolled H-shaped steel and a production method thereof. The chemical composition thereof comprises C: 0.04-0.11, Si: 0.10-0.40, Mn: 0.40-1.00, Cr: 0.40-1.00, Cu: 0.10~0.40, Nb: 0.020~0.060, V: 0.040~0.100, Ti: 0.010~0.025, Al: 0.010~0.030, N: 0.0060~0.0120, P: ≤0.015, S: ≤0.005, O: ≤0.0060 , 0.090%≤Nb+V+Ti≤0.170%, 6.5≤(V+Ti) / N≤10.5, the rest is Fe and trace residual elements, 0.30%≤CEV≤0.48%; the flange thickness of the present invention is 90mm~150mm, With excellent comprehensive mechanical properties, it can well meet the needs of heavy supporting structural parts such as high-rise buildings, large squares, and bridge structures.

Description

technical field [0001] The invention relates to the technical field of metal material production, in particular to an ultra-thick specification hot-rolled H-shaped steel and a production method thereof. Background technique [0002] With the rapid economic and social development, the construction of high-rise buildings, large venues, bridge main towers, etc., more and more attention is paid to the safety, comfort and aesthetics. The design adopts heavy steel structure, and the thickness of the flange is 90mm ~ 150mm. The ultra-thick specification hot-rolled H-beam is its core supporting member. [0003] Long-term practice has shown that the comprehensive mechanical properties of the hot-rolled H-shaped steel flange are weaker than that of the web, and the standard GB / T2975 also stipulates that the flange should be sampled for mechanical performance evaluation. The industry usually uses the hot-rolled H-shaped steel flange as the description object. It is recognized by the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50C21D6/00C21D8/00B21B1/088B21B37/74B21B37/76
CPCC22C38/02C22C38/04C22C38/002C22C38/42C22C38/46C22C38/48C22C38/50C22C38/06C22C38/001C21D8/005C21D6/004C21D6/005C21D6/008B21B1/088B21B37/74B21B37/76C21D2211/005C21D2211/002C21D2211/001Y02P10/20C21D9/0068C21D6/002C21D1/02C21D7/13C21D1/60C21D1/18C21D1/84
Inventor 夏勐吴保桥吴湄庄邢军汪杰陈辉彦井成黄琦彭林何军委丁朝晖沈千成
Owner MAANSHAN IRON & STEEL CO LTD