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Prestressed wire for bridge and production process of prestressed wire

A technology of prestressed steel wire and production process, which is applied in the fields of prestressed steel wire and its production process, prestressed steel wire for bridges and its production process, and can solve a large number of problems such as manpower and material resources and economic losses, so as to improve the service life and strengthen the market. Competitiveness, the effect of ensuring stability

Inactive Publication Date: 2015-03-25
TIANSHUN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The replacement of cables requires a lot of manpower and material resources, causing huge economic losses, so it is imminent to study the corrosion of bridge cable systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A prestressed steel wire for a bridge provided in this example, the chemical composition of the steel wire by weight percentage is: C: 0.45%, Si: 1.5%, Mn: 0.4%, Ni: 0.3%, Cr: 0.1%, Nb: 0.07% , Ti: 0.02%, V: 0.05%, Mo: 0.01%, P: 0.01%, S: 0.008%, composite rare earth: 0.02%, and the balance is iron and other unavoidable trace impurities; in the composite rare earth, Contains the following components by weight percentage: Ce: 12%, Sc: 15%, Gd: 11%, Pr: 15%, and the balance is La.

[0022] The prestressed steel wire production process of this embodiment includes pickling, phosphating, saponification, cold rolling, cold drawing and galvanizing processes,

[0023] (1) Pass the steel wire produced according to the above components through 15% dilute sulfuric acid for pickling, the pickling temperature is 65°C, and the pickling time is 25 minutes;

[0024] ⑵Phosphating treatment in phosphate solution, the acidity pH value is 5.5, the phosphating time is 8min, and the phospha...

Embodiment 2

[0029] A prestressed steel wire for a bridge provided in this embodiment, the chemical composition of the steel wire in weight percent is: C: 0.55%, Si: 1.9%, Mn: 1.4%, Ni: 0.5%, Cr: 0.6%, Nb: 0.21%, Ti: 0.3%, V: 0.74%, Mo: 0.03%, P: 0.012%, S: 0.009%, compound rare earth: 0.04%, the balance is iron and other unavoidable trace impurities;

[0030] The composite rare earth contains the following components by weight percentage: Ce: 14%, Sc: 19%, Gd: 15%, Pr: 20%, and the balance is La.

[0031] The prestressed steel wire production process of this embodiment includes pickling, phosphating, saponification, cold rolling, cold drawing and galvanizing processes,

[0032] (1) Pass the steel wire produced according to the above components through 20% dilute sulfuric acid for pickling, the pickling temperature is 62°C, and the pickling time is 22 minutes;

[0033] ⑵ Phosphating treatment in phosphate solution, the acidity pH value is 6.0, the phosphating time is 15min, and the phosph...

Embodiment 3

[0038] A prestressed steel wire for a bridge provided in this embodiment, the chemical composition of the steel wire in weight percentage is: C: 0.65%, Si: 2.3%, Mn: 2.2%, Ni: 0.7%, Cr: 0.8%, Nb: 0.35%, Ti: 0.6%, V: 0.1%, Mo: 0.05%, P: 0.014%, S: 0.015%, compound rare earth: 0.06%, the balance is iron and other unavoidable trace impurities;

[0039] The composite rare earth contains the following components by weight percentage: Ce: 16%, Sc: 33%, Gd: 16%, Pr: 23%, and the balance is La.

[0040] The prestressed steel wire production process of this embodiment includes pickling, phosphating, saponification, cold rolling, cold drawing and galvanizing processes,

[0041] (1) Pickling the steel wire produced according to the above components through 30% dilute sulfuric acid, the pickling temperature is 60°C, and the pickling time is 20 minutes;

[0042] ⑵ Phosphating treatment in a phosphate solution, the acidity pH value is 6.5, the phosphating time is 20min, and the phosphating...

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Abstract

The invention relates to a prestressed wire for a bridge. The wire comprises the following chemical components in percentage by weight: 0.45%-0.65% of C, 1.5%-2.3% of Si, 0.4%-2.2% of Mn, 0.3%-0.7% of Ni, 0.1%-0.8% of Cr, 0.07%-0.35% of Nb, 0.02%-0.6% of Ti, 0.05%-0.1% of V, 0.01%-0.05% of Mo, less than 0.015% of P, less than 0.015% of S, 0.02%-0.06% of composite rare earth, and the balance of iron and inevitable other trace impurities. A production process of the prestressed wire disclosed by the invention comprises the following processes of pickling, phosphorization, saponifying, cold rolling, cold drawing and galvanizing. The prestressed wire disclosed by the invention is applied to the bridge construction, so that a lot of bridge construction materials can be saved; the construction time is shortened; and the engineering quality stability is ensured. The prestressed wire has relatively high corrosion resistance and relatively good fatigue resistance, so that the service life of a cable is greatly prolonged; and the economic benefits and social benefits are significant.

Description

technical field [0001] The invention relates to a prestressed steel wire and a production process thereof, in particular to a prestressed steel wire for bridges and a production process thereof, and belongs to the technical field of metal smelting processes. Background technique [0002] With the increasing air pollution, the durability of bridge cable systems began to appear. The degree and speed of cable corrosion in many cable bridges greatly exceeded expectations. The cables that were designed to be replaced every 30 years were often used for more than 10 years due to various corrosions. Serious phenomena such as cable breakage occur. Even in order to ensure the safety of the bridge, the cables were replaced in advance. The replacement of cables requires a lot of manpower and material resources, which causes huge economic losses. Therefore, it is imminent to study the corrosion of bridge cable systems. The country's industrial policy and the huge potential market deman...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/50B21C37/04
Inventor 姚圣法吴海洋
Owner TIANSHUN GROUP
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