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High-strength pre-stressed steel strand with coating and manufacturing method of steel strand

A pre-stressed steel strand, high-strength technology, used in coatings, manufacturing tools, metal material coating processes, etc., can solve the problems of twisting, winding performance can not reach 0.80 or more, and can not be supplied in batches, etc. Achieve the effect of reducing the source of microcracks after welding, improving toughness, uniform composition and structure

Active Publication Date: 2015-01-21
溧阳市万兴特种建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]In recent years, China's galvanized steel strand industry has developed rapidly, and domestic production technology has been continuously improved. In order to obtain greater investment returns, domestic galvanized steel strand enterprises are producing As the scale and product quality continue to improve, people have higher and higher requirements for galvanized steel strands. Specifically, in terms of strength, toughness, tensile strength and corrosion resistance, the process flow of galvanized steel strands is as follows: : Wire setting-degreasing (alkaline cleaning)-hot water washing-water washing-hydrochloric acid washing-clear water washing-solvent treatment-drying-hot-dip galvanizing-wiping-receiving-finished products, the steel strands produced are used in daily life In daily life, at the same time, when domestic and foreign manufacturers use the existing high-carbon steel wire to produce some specifications of UHV galvanized steel strand, due to the fluctuation of the performance of the wire rod (the same circle difference> 60MPa), the finished galvanized wire rod is damaged. The ratio of 1% elongation stress to tensile strength cannot reach more than 0.80, and the torsion and winding performance cannot fully meet the requirements of high-strength galvanized wire and steel strand, so it cannot be supplied in batches, and it needs to be specially designed for galvanized steel strand Development of new production methods for wire rods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The weight percentage composition of the high-strength prestressed steel strand with coating in the present invention is: the weight percentage composition of the coating is: C: 0.60%, Mn: 0.70%, Si: 0.20%, Cu: 0.20%, Cr: 0.1%, P: 0.030%, S: 0.020%, N: 0.0080%, Al: 0.057%, Nb: 0.005%, V: 0.06%, Ti: 0.035%, Ni: 0.05%, Mo: 0.53%, B: 0.007%, lanthanum: 0.07%, cerium: 0.03%, praseodymium: 0.01%, and the rest is Zn.

[0051] The production method of the high-strength prestressed steel strand with coating described in present embodiment, for example claim 5, comprises the following steps: (1) hot-dip: carry out hot-dip on single steel wire, the coating of described composition is evenly plated On the surface of the steel wire; (ii) the first heat treatment: send the coated steel wire into the heating furnace and heat it to 670 ° C, and then cool the steel wire to 370-390 ° C quickly through the first cooling process on the line, and then heat it through the tempering heating ...

Embodiment 2

[0053] The present embodiment has the high-strength prestressed steel strand of coating:

[0054] The weight percent components of the coating are: C: 0.65%, Mn: 0.75%, Si: 0.25%, Cu: 0.30%, Cr: 0.2%, P: 0.020%, S: 0.010%, N: 0.0070%, Al : 0.058%, Nb: 0.006%, V: 0.07%, Ti: 0.036%, Ni: 0.06%, Mo: 0.54%, B: 0.008%, lanthanum: 0.08%, cerium: 0.04%, praseodymium: 0.02%, the rest for Zn.

[0055] The production method of the high-strength prestressed steel strand with coating in this embodiment comprises the following steps: (1) hot-dip: hot-dip on a single steel wire, and the coating of described composition is evenly plated on the steel wire surface; (2) the second 1. Heat treatment: Send the coated steel wire into the heating furnace and heat it to 680°C, and then cool the steel wire quickly to 380°C through the first cooling process online, then heat it to 600°C in the tempering furnace, and then pass through the first cooling process. The second cooling process is to cool do...

Embodiment 3

[0057] The percentage by weight of each component in the wire rod for high-strength steel strand with galvanized layer in this embodiment is: high-strength prestressed steel strand with coating, and the percentage by weight of the coating is: C: 0.70 %, Mn: 0.85%, Si: 0.30%, Cu: 0.40%, Cr: 0.3%, P: 0.010%, S: 0.005%, N: 0.0060%, Al: 0.059%, Nb: 0.007%, V: 0.08 %, Ti: 0.037%, Ni: 0.07%, Mo: 0.55%, B: 0.009%, Lanthanum: 0.09%, Cerium: 0.05%, Praseodymium: 0.03%, and the rest is Zn.

[0058] The production method of the high-strength prestressed steel strand with coating in this embodiment comprises the following steps: (1) hot-dip: hot-dip on a single steel wire, and the coating of described composition is evenly plated on the steel wire surface; (2) the second 1. Heat treatment: Send the coated steel wire into the heating furnace and heat it to 690°C, and then cool the steel wire quickly to 390°C through the first cooling process online, and then heat it to 610°C in the temperi...

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Abstract

The invention discloses a high-strength pre-stressed steel strand with a coating. The coating comprises the following components in percentage by weight: 0.60%-0.70% of C, 0.70%-0.85% of Mn, 0.20%-0.30% of Si, 0.20%-0.40% of Cu, 0.1%-0.3% of Cr, 0-0.030% of P, 0-0.020% of S, 0-0.0080% of N, 0.057%-0.059% of Al, 0.005%-0.007% of Nb, 0.06%-0.08% of V, 0.035%-0.037% of Ti, 0.05%-0.07% of Ni, 0.53%-0.55% of Mo, 0.007%-0.009% of B, 0.07%-0.09% of La, 0.03%-0.05% of Ce, 0.01%-0.03% of Pr and the balance of Zn, Fe and inevitable impurities. The steel strand has the characteristics of high steel purity, uniform component and tissue, and good stress distribution performance.

Description

technical field [0001] The invention relates to a galvanized steel strand, in particular to a high-strength prestressed steel strand with coating and a manufacturing method thereof. Background technique [0002] In recent years, China's galvanized steel strand industry has developed rapidly, and domestic production technology has been continuously improved. In order to obtain greater investment returns, domestic galvanized steel strand enterprises have continuously improved their production scale and product quality. The requirements for stranded wire are getting higher and higher, specifically in terms of strength, toughness, tensile strength and corrosion resistance. -Hydrochloric acid washing-washing-solvent treatment-drying-hot-dip galvanizing-wiping-receiving-finished products, the produced steel strands are used in daily life, at the same time, domestic and foreign manufacturers use existing high-carbon steel When some specifications of UHV galvanized steel strands ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/00C23C2/06C21D9/52
Inventor 姚圣法吴海洋
Owner 溧阳市万兴特种建材有限公司