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Refined wire with high low-temperature high-speed torsional property and production method and application thereof

A technology of torsion performance and wire rod, applied in the field of metallurgy, can solve the problems of work hardening, unreasonable deformation pass setting, etc., to achieve the effect of excellent plasticity and increase production cost

Inactive Publication Date: 2016-06-08
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional drawing methods often result in severe work hardening due to excessive deformation or unreasonable pass settings.

Method used

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  • Refined wire with high low-temperature high-speed torsional property and production method and application thereof
  • Refined wire with high low-temperature high-speed torsional property and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The wire rod adopted in the embodiment, its composition is according to weight percentage: C: 0.05%, Si: 0.06%, Mn: 0.30%, P: 0.020%, S: 0.020%, the balance is Fe and other unavoidable impurities , The diameter of the wire rod is Φ14mm.

[0028] The wire rod is pickled, phosphated and saponified, followed by rough drawing. In the rough drawing stage, the drawing is from Φ14mm to Φ11.4mm, and the total area reduction rate of rough drawing is 33.69%. The deformation is completed in two passes, the first pass is drawn from Φ14mm to Φ12.1mm, the second pass is drawn from Φ12.1mm to Φ11.4mm, and the deformation of the first pass accounts for 75% of the total rough drawing deformation. The intermediate heat treatment temperature is 670°C, the holding time is 4h, and the furnace temperature is 400°C. The annealed material was drawn from Φ11.4mm to Φ11.1mm after pickling, phosphating and saponification, and the area reduction rate was 5.19%.

[0029] Refined wire rods are ma...

Embodiment 2

[0031] The wire rod adopted in the embodiment, its composition is according to weight percentage: C: 0.06%, Si: 0.07%, Mn: 0.40%, P: 0.020%, S: 0.020%, the balance is Fe and other unavoidable impurities , The diameter of the wire rod is Φ11mm.

[0032] The wire rod is pickled, phosphated and saponified, followed by rough drawing. In the rough drawing stage, the drawing is from Φ11mm to Φ8.99mm, and the total area reduction rate of rough drawing is 33.2%. The deformation is completed in two passes, the first pass is drawn from Φ11mm to Φ9.7mm, the second pass is drawn from Φ9.7mm to Φ8.99mm, and the deformation of the first pass accounts for 67% of the total rough drawing deformation. The intermediate heat treatment temperature is 690°C, the holding time is 4.5h, and the furnace temperature is 350°C. The annealed material was drawn from Φ8.99mm to Φ8.8mm after pickling, phosphating and saponification, and the area reduction rate was 4.18%.

[0033] Refined wire rods are made...

Embodiment 3

[0035] The wire rod adopted in the embodiment, its composition according to weight percentage is: C: 0.03%, Si: 0.06%, Mn: 0.39%, P: 0.010%, S: 0.030%, the balance is Fe and other unavoidable impurities . The diameter of the wire rod is Φ10mm.

[0036]The wire rod is pickled, phosphated and saponified, followed by rough drawing. In the rough drawing stage, the drawing is from Φ10mm to Φ8.08mm, and the total area reduction rate of rough drawing is 34.71%. The deformation is completed by two passes, the first pass is drawn from Φ10mm to Φ8.74mm, the second pass is drawn from Φ8.74mm to Φ8.08mm, and the deformation of the first pass accounts for 68% of the total rough drawing deformation. The intermediate heat treatment temperature is 685°C, the holding time is 5h, and the furnace temperature is 450°C. The annealed material was drawn from Φ8.08mm to Φ7.85mm after pickling, phosphating and saponification, and the area reduction rate was 5.62%.

[0037] Refined wire rods are ma...

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Abstract

The invention discloses a refined wire with the high low-temperature high-speed torsional property and a production method and application thereof. The refined wire is composed of, by mass, 0-0.06% of C, 0-0.10% of Si, 0.20%-0.40% of Mn, 0-0.030% of P, 0-0.030% of S and the balance Fe and other inevitable impurities. The production method includes the steps that the diameter of a steel wire rod which is subjected to the first time of surface treatment is reduced through first series of dry-method rough drawing procedures, after intermediate heat treatment, the second time of surface treatment is completed, and after second series of dry-method finish drawing procedures, the refined wire is obtained. The obtained refined wire has the typical characteristics of low strength and high plasticity, the actual tensile strength of the wire is 300-325 MPa, the percentage elongation after fracture of the wire is 40%-45%, and the percentage reduction of area of the wire is not lower than 80%. According to the production method, production cost is not increased, and the excellent low-temperature high-speed torsional property of a torsion bar product is guaranteed through optimization of drawing deformation and deformation configuration of all passes.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a refined wire rod with high low-temperature high-speed torsion performance, a production method and application thereof. Background technique [0002] In recent years, with the rapid development of China's auto market and the increasing emphasis of car buyers on safety systems, the market for auto safety system components will become larger and larger. Torsion bars are high value-added products. The current market demand is about 20 million pieces per year, and it is showing a trend of further expansion. However, this product is currently mainly dependent on imports. Therefore, Xinggang’s technology and equipment advantages in the field of deep processing of wire rods should be fully utilized. Turning the torsion bar into a competitive product is of great significance to enhancing competitiveness and establishing a new brand image in the high-end auto market. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21D8/06C22C38/02
CPCC22C38/04C21D8/065C22C38/02
Inventor 刘超田新中张治广崔娟陈继林孟军学李文奇翟进坡冯忠贤王宁涛
Owner XINGTAI IRON & STEEL
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