Special-shaped-cross-section hot-rolled steel plate coil and manufacturing method thereof

A hot-rolled steel plate, cross-section technology, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problem of unreasonable, insufficient welding thickness at both ends of U-ribbed steel, and cracked structural strength of cold-formed corner welds. and other problems to achieve the effect of reducing secondary welding, improving the safety of welded structures, and improving the pass rate

Inactive Publication Date: 2016-05-25
莱芜美澳冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The U-rib steel manufacturing methods currently being applied have not fundamentally solved the problems of weld cracking and unreasonable structural strength caused by insufficient welding thickness at both ends of U-rib steel and thinning of cold-formed corners.

Method used

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  • Special-shaped-cross-section hot-rolled steel plate coil and manufacturing method thereof
  • Special-shaped-cross-section hot-rolled steel plate coil and manufacturing method thereof
  • Special-shaped-cross-section hot-rolled steel plate coil and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A special-shaped cross-section hot-rolled steel plate coil, which is composed of a base plate 1, a central double-sided thickening zone 2, an end double-sided thickening zone 3, and an inner arc r1, and its longitudinal length can reach 350 meters. The central bilateral thickened region 3 is horizontally connected by the substrate 1 to form a whole, and the inner arc r1 is used for a smooth transition between the central bilateral thickened region 2 and the end bilateral thickened region 3 and the substrate 1 . Such as figure 1 shown.

[0059] The central double-sided thickened region 2 is symmetrically located on both sides of the centerline AA of the substrate (1), and the central double-sided thickened region 2 and the substrate 1 are connected together through a smooth transition of the inner arc r1.

[0060] The distance between the centerlines of the two central bilateral thickening zones 2 is 150mm.

[0061] The end double-sided thickened regions 3 are symmetri...

Embodiment 2

[0068] Others are the same as embodiment 1, the difference is:

[0069] Special-shaped cross-section hot-rolled steel plate coil, composed of base plate 1, central double-sided thickened zone 2, end double-sided thickened zone 3 and inner arc r1, its longitudinal length can reach 450 meters; two central double-sided thickened zones 2 centerline The distance between them is 250mm.

[0070] The thickness d of the substrate is 7 mm; the thickness d1 of the middle double-sided thickened region 2 is 8 mm; the thickness d2 of the double-sided thickened region 3 at the end is 10 mm.

[0071] Its cross section: the length of the bilateral thickened region 3 at the end is 30 mm; its cross section: the length of the bilateral thickened region 2 in the middle is 100 mm.

Embodiment 3

[0073] Others are the same as embodiment 1, the difference is:

[0074] Special-shaped cross-section hot-rolled steel plate coil, composed of base plate 1, central double-sided thickened zone 2, end double-sided thickened zone 3 and inner arc r1, its longitudinal length can reach 550 meters; two central double-sided thickened zones 2 centerline The distance between them is 480mm.

[0075] The thickness d of the substrate is 20 mm; the thickness d1 of the middle double-sided thickened region 2 is 22 mm; the thickness d2 of the end double-sided thickened region 3 is 26 mm.

[0076] Its cross section: the length of the bilateral thickened region 3 at the end is 50 mm; its cross section: the length of the bilateral thickened region 2 in the middle is 80 mm.

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Abstract

The invention provides a special-shaped-cross-section hot-rolled steel plate coil and a manufacturing method thereof. The cross section of the special-shaped-cross-section hot-rolled steel plate coil is composed of a base plate (1), a middle double-side thickening region (2), an end double-side thickening region (3) and an inner arc r1, wherein the lengthwise strength of the special-shaped-cross-section hot-rolled steel plate coil can reach 6-600 meters; the middle double-side thickening region (2) and the end double-side thickening region (3) are horizontally connected by the base plate (1) to form an integral body; and the middle double-side thickening region (2) and the end double-side thickening region (3) transit to the base plate (1) through the inner arc r1. The special-shaped-cross-section hot-rolled steel plate coil is prepared by finish rolling by using four-roller composite-orifice rollers and a matched technique. The special-shaped-cross-section hot-rolled steel plate coil is used for producing cold-roll-formed U rib steel, solves the technical problems of welding spot cracking and irrational structural strength caused by insufficient welding thickness on the two ends of the existing uniform-thickness U rib and reduced thickness of the bent angle part, enhances the stability and safety of the bridge, and lowers the manufacturing and maintenance cost of the bridge.

Description

technical field [0001] The utility model belongs to the technical field of metallurgy, and in particular relates to a special-shaped cross-section hot-rolled steel plate coil and a manufacturing method thereof, in particular to a special-shaped cross-section hot-rolled steel plate coil for U-rib bridges used in cold-formed production and its manufacture method. Background technique [0002] After World War II, Germany needed to rebuild a large number of bridges damaged in the war. At that time, four very important innovative ideas in bridge engineering: cable-stayed bridges, composite beams, orthotropic slab-steel decks, and prestressed concrete segmental construction methods developed rapidly almost simultaneously, while orthotropic slab-steel bridges The application of the surface makes many super-long-span bridges possible. The scale of my country's bridge construction in the past 20 years has never been seen in history. Especially in the past 10 years after entering t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S1/04B21B27/02B21B1/08B21C37/02
CPCF16S1/04B21B1/08B21B27/021B21C37/02
Inventor 董涛
Owner 莱芜美澳冶金科技有限公司
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