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Method for preparing high-strength steel wire by roller die drawing integrated cold drawing process

A high-strength steel wire and roll die drawing technology, which is applied in the field of metal product processing, can solve the problems of large tensile stress, easy wire breakage, roll die drawing steel wire dimensional accuracy, etc., and achieve the effect of increasing the elongation rate of steel wire and improving production efficiency

Inactive Publication Date: 2019-04-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved: the present invention provides a method for preparing high-strength steel wire by using roller die drawing combined with cold drawing process, which solves the problems of large residual tensile stress on the surface of traditional cold drawn steel wire, production of easily broken wire and roller die drawn steel wire. To solve the problem of low dimensional accuracy, to achieve the purpose of improving production efficiency and obtaining steel wire products with excellent comprehensive performance

Method used

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  • Method for preparing high-strength steel wire by roller die drawing integrated cold drawing process
  • Method for preparing high-strength steel wire by roller die drawing integrated cold drawing process

Examples

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Effect test

Embodiment 1

[0016] Process high-carbon steel wire rods with a carbon content of 0.70wt.% and Φ8.0mm into high-strength steel wires of Φ3.0mm. The process is specifically implemented as follows:

[0017] 1) First, pickle the Φ8.0mm high-carbon steel wire rod in a hydrochloric acid solution with a mass concentration of 160g / L for 1-60s, and pickle it in a NaCl solution with a mass concentration of 280g / L 2 B 4 o 7 .10H 2 Coating in O solution for 1-60s, drying;

[0018] 2) Next, the high-carbon steel wire rod is used for the drawing deformation of the roller die. After 8 drawing passes, the average pass compression rate is about 20%, pre-drawn to Φ3.1mm, and the pre-drawing strain ε≈ 1.90;

[0019] 3) Then, the high-carbon steel wire of Φ3.1mm after being drawn and deformed by the roller die is deformed to Φ3.0mm through one pass of cold drawing, and the compression rate of the deformation pass is about 6%;

[0020] 4) Finally, take up the wire and pack it into a high-strength steel wi...

Embodiment 2

[0022] Process high-carbon steel wire rods with a carbon content of 0.70wt.% and Φ5.6mm into high-strength steel wires of Φ2.0mm. The process is specifically implemented as follows:

[0023] 1) First, pickle a Φ5.6mm high-carbon steel wire rod in a hydrochloric acid solution with a mass concentration of 160g / L for 1-60s, and pickle it in a NaCl solution with a mass concentration of 280g / L 2 B 4 o 7 .10H 2 Coating in O solution for 1-60s, drying;

[0024] 2) Next, the high-carbon steel wire rod is used for the drawing deformation of the roller die. After 8 drawing passes, the average pass compression rate is about 20%, pre-drawn to Φ2.05mm, and the pre-drawing strain ε≈ 2.0;

[0025] 3) Then, the high-carbon steel wire of Φ2.05mm after being drawn and deformed by the roller die is deformed to Φ2.0mm through one pass of cold drawing, and the compression rate of the deformation pass is about 5%;

[0026] 4) Finally, take up the wire and pack it into a high-strength steel wir...

Embodiment 3

[0028] Process high-carbon steel wire rods with a carbon content of 0.70wt.% and Φ5.0mm into high-strength steel wires of Φ2.0mm. The process is specifically implemented as follows:

[0029] 1) First, pickle the Φ5.0mm high-carbon steel wire rod in a hydrochloric acid solution with a mass concentration of 160g / L for 1-60s, and pickle it in a NaCl solution with a mass concentration of 280g / L 2 B 4 o 7 .10H 2 Coating in O solution for 1-60s, drying;

[0030] 2) Next, the high-carbon steel wire rod is used for the drawing deformation of the roller die. After 7 drawing passes, the average pass compression rate is about 20%, pre-drawn to Φ2.05mm, and the pre-drawing strain ε≈ 1.78;

[0031] 3) Then, the high-carbon steel wire of Φ2.05mm after being drawn and deformed by the roller die is deformed to Φ2.0mm through one pass of cold drawing, and the compression rate of the deformation pass is about 5%;

[0032] 4) Finally, take up the wire and pack it into a high-strength steel ...

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Abstract

The invention discloses a method for preparing a high-strength steel wire by a roller die drawing integrated cold drawing process. The method comprises the following steps: performing acid-pickling and boronizing treatment on a high-carbon steel wire rod with a diameter of phi 5.0-phi 8.0 mm; using the processed wire rod for roller die drawing deformation, and controlling a pre-drawing dependent variable epsilon to be smaller than or equal to 2.0, wherein epsilon is equal to ln (A0 / A), A0 is the initial cross section area of a steel wire, and A is the cross section of the drawn steel wire; performing sizing processing on the steel wire subjected to roller die drawing deformation through follow-up cold drawing deformation; and taking up and packaging to form a high-strength steel wire product. The method improves production efficiency, has a cold-drawing production rate of a 4-6m / s, and has a stable production rate of roller die drawing can be 7-8m / s; and residual pressure stress of about 100 MPa can be generated on the surface of the steel wire, and the steel wire ductility is improved by 20% or more.

Description

technical field [0001] The invention belongs to the technical field of metal product processing, and in particular relates to a method for preparing high-strength steel wire, in particular to a production method for preparing high-strength steel wire by rolling die drawing combined with cold drawing. Background technique [0002] High-strength steel wire is usually made of high-carbon steel wire rod through cold drawing deformation. Because of its certain plasticity and toughness, it is widely used in important fields such as automobile tire steel cord, long-span bridge stay cable and cutting steel wire. [0003] Cold drawing is the main technology for preparing high-strength steel wire. The products produced by it are accurate in size (±0.01mm), but there are also some shortcomings: First, the frictional resistance generated between the mold and the surface of the steel wire is relatively large, which easily causes mold wear and reduces The service life of the mold; secondl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02B21C43/02
CPCB21C1/02B21C43/02
Inventor 方峰蒋建清陈得友闵学刚李龙冯汉臣
Owner SOUTHEAST UNIV
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