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Production method of low-defect high-strength steel wire

A high-strength steel wire and production method technology, applied in the field of iron and steel metallurgy, can solve the problems of high strength, poor steel wire strength, and less defects, and achieve the effects of improved mechanical properties, easy realization, and good results

Active Publication Date: 2014-08-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor steel wire strength in the prior art, the present invention provides a production method of low-defect high-strength steel wire, which has the advantages of less defects and high strength

Method used

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  • Production method of low-defect high-strength steel wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Production of SWRH82B high carbon steel wire rod,

[0019] 1) SWRS82B high-carbon steel wire rod with a diameter of 13mm can be used for cold drawing deformation after pickling and phosphating;

[0020] 2) High carbon steel wire rod is pre-drawn to a diameter of 6.1mm, and the pre-drawing deformation is ε≈1.5;

[0021] 3) Control the austenitizing temperature of the steel wire: 840℃~850℃, and the austenitizing time: 25~30 minutes;

[0022] 4) After the austenitized steel wire is subjected to subsequent cold drawing to 2.5mm, the drawing deformation variable ε≈1.8;

[0023] 5) Made of high-strength steel wire, the strength is about 2020MPa. Compared with the steel wire produced by the traditional process, the strength is about 1900MPa, and the strength is increased by about 6%. According to statistics, the number of microscopic defects is reduced from about 38% to about 18% of the traditional process steel wire.

Embodiment 2

[0025] Production of SWRH82B high carbon steel wire rod,

[0026] 1) SWRS82B high-carbon steel wire rod with a diameter of 5.5mm can be used for cold drawing deformation after pickling and phosphating;

[0027] 2) High carbon steel wire rod is pre-drawn to a diameter of 2.02mm, and the pre-drawing deformation is ε≈2.0;

[0028] 3) Control the austenitization temperature of the steel wire: 790°C to 800°C, and the austenitization time: 10 to 15 minutes;

[0029] 4) The austenitized steel wire is subjected to subsequent cold drawing to 1.01mm, and the drawing deformation variable ε≈1.8;

[0030] 5) The strength of the high-strength steel wire produced is about 2050MPa. Compared with the steel wire produced by traditional technology, the strength is about 1910MPa, and the strength is increased by about 7%. According to statistics, the number of microscopic defects is reduced from about 38% to about 16% of the traditional technology steel wire .

Embodiment 3

[0032] Production of SWRH82B high carbon steel wire rod,

[0033] 1) SWRS82B high-carbon steel wire rod with a diameter of 5.5mm can be used for cold drawing deformation after pickling and phosphating;

[0034] 2) High carbon steel wire rod is pre-drawn to a diameter of 1.5mm, and the pre-drawing deformation is ε≈2.23;

[0035] 3) Control the austenitization temperature of steel wire: 780℃~790℃, austenitization time: 10~15 minutes;

[0036] 4) After the austenitized steel wire is subjected to subsequent cold drawing to 0.5mm, the drawing deformation variable ε≈2.19;

[0037] 5) The strength of the high-strength steel wire produced is about 2360MPa. Compared with the steel wire produced by the traditional process, the strength is about 2120MPa, and the strength is increased by about 11%. According to statistics, the number of microscopic defects is reduced from about 43% of the traditional process steel wire to about 21%. .

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Abstract

The invention discloses a production method of a low-defect high-strength steel wire. The technical scheme is as follows: a high-carbon steel wire rod can be subjected to cold-drawing deformation after acid pickling and phosphating; the pre-drawing deformation rate epsilon of the high-carbon steel wire rod is controlled to be larger than or equal to 1.5, and the epsilon is equal to 1n (A0 / A), wherein A0 is the initial cross section area of the steel wire, and A is the cross section area of the drawn steel wire; austenitizing is performed on the steel wire at the temperature of 760 DEG C to 850 DEG C for 5-30 min; the austenitized steel wire is subjected to a follow-up cold drawing process; and the steel wire is wound and packaged to obtained a high-strength steel wire product.

Description

technical field [0001] The invention relates to a production method of high-strength steel wire, which belongs to the field of iron and steel metallurgy. Background technique [0002] High-strength steel wire is widely used in important fields such as long-span bridges, automobile industry, and cutting wire, and is an important industrial product. High-strength steel wire is made of high-carbon pearlitic steel wire rod through cold drawing deformation. Usually, for high-strength steel wire, the production process is generally: high-carbon pearlitic steel wire rod → pickling → phosphating → pre-drawing → austenitizing treatment → multi-pass drawing → high-strength steel wire products. [0003] During the cold drawing deformation process of high carbon steel, due to the cold drawing stress, the lamellar pearlite in the vertical or near vertical direction will be bent and broken, and micro defects will be formed inside the steel wire, which will affect the high strength. Mech...

Claims

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Application Information

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IPC IPC(8): B21C1/02C21D8/06
Inventor 方峰蒋建清周雪峰周立初赵宇飞
Owner SOUTHEAST UNIV