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Production method of hdpe hot-dip galvanized prestressed steel strand for bridge cables

A technology of prestressed steel strand and production method, applied in hot-dip plating process, textile cable, coating and other directions, can solve problems such as urgent research and development, and achieve saving bridge construction materials, good fatigue resistance, economic benefits and social benefits Significant effect

Active Publication Date: 2016-02-10
天津市新天钢钢线钢缆有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] In short, the production technology of non-adhesive high-strength low-relaxation prestressed hot-dip galvanized steel strands for expressway bridge cables needs to be developed urgently

Method used

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  • Production method of hdpe hot-dip galvanized prestressed steel strand for bridge cables
  • Production method of hdpe hot-dip galvanized prestressed steel strand for bridge cables
  • Production method of hdpe hot-dip galvanized prestressed steel strand for bridge cables

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Embodiment Construction

[0019] The production method of the HDPE hot-dip galvanized prestressed steel strand for bridge cables of the present invention is illustrated in conjunction with the accompanying drawings.

[0020] The production method of HDPE hot-dip galvanized prestressed steel strand for bridge cable of the present invention:

[0021] (1) drawing

[0022] Italian RI9 / 1200 wire drawing equipment is adopted. The wire drawing process adopts active stirring lubrication and rotating cooling mold combination technology to improve lubrication conditions, ensure the surface quality of semi-finished steel wire and improve the plasticity and torsion performance of steel wire. Its industrial characteristics are:

[0023] a. Adopt "small angle + long core" drawing die, working cone angle of drawing die: 8-10°, core length: 28-35mm, such as figure 2 shown.

[0024] b. Nine times of continuous drawing, the wire drawing process route with hump-shaped compression ratio distribution is selected, and th...

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Abstract

The invention discloses a manufacture method for HDPE hot dip galvanizing prestressed steel strands used for bridge cable ropes. The method comprises the steps: wire drawing; hot dip galvanizing; twisting and stabilization treatment; the technical indexes of the hot dip galvanizing prestressed steel strands manufactured by the method are that the tensile strength is larger than or equal to 1860 MPa, the elongation rate with maximum force is larger than or equal to 5.0%, the reduction of area of monofilament is larger than or equal to 25%, a bending and fatigue resistance test of a saddle system applies a cyclic load of 800 MPa, and the steel strands can be used for 2 million times without breaking. The effect of the manufacture method, disclosed by the invention, can reduce 15% of steel consumption, shorten the construction period and guarantee the stable quality of a project when the hot dip galvanizing prestressed steel strands are used during the construction of a bridge. The hot dip galvanizing prestressed steel strands have the features of high corrosion resistance and good fatigue durability, so that the service life of cable ropes can be prolonged more than one time. Obvious economic benefits and social benefits can be generated when the hot dip galvanizing prestressed steel strands are used during the construction of the bridge.

Description

technical field [0001] The invention relates to a production method of HDPE hot-dip galvanized prestressed steel strands for bridge cables. Background technique [0002] The development project of HDPE hot-dip galvanized prestressed steel strands for bridge cables is a new type of metal material independently developed by our company according to market demand. The products are suitable for bridge cables, anchor tension members, lifting and fixing tension members and civil engineering. other components. As the basic raw material of bridge cables at present, "steel wire for bridge cables and its products", it is necessary to continuously improve the fatigue resistance performance index, and continuously study the methods of improving the service life to meet the development requirements of bridges. [0003] Due to the corrosion of steel wire inside the cable, it is difficult to check and handle, so users also attach great importance to the problem of chemical corrosion resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/06D07B3/00C23C2/06
Inventor 郭鑫王雅志翟巧玲王志永苏子波刘毅俞振根李桂林朱树行王国良孔庆林
Owner 天津市新天钢钢线钢缆有限公司
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