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Method of implementing on line softening annealing of medium, high carbon steel wire using high energy electric pulse

A high-carbon steel wire, softening annealing technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of complex equipment and processes, long heat treatment cycle, high production cost, etc., and achieve short processing time, excellent comprehensive performance and low production cost low effect

Inactive Publication Date: 2007-01-31
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softening annealing process currently used in production has a long heat treatment cycle and low production efficiency. After the treatment, the steel wire must go through a series of processes such as surface treatment before it can be used. The equipment and process are very complicated, and the production cost is quite high.

Method used

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  • Method of implementing on line softening annealing of medium, high carbon steel wire using high energy electric pulse
  • Method of implementing on line softening annealing of medium, high carbon steel wire using high energy electric pulse
  • Method of implementing on line softening annealing of medium, high carbon steel wire using high energy electric pulse

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Embodiment 1

[0024] Example 1: GCr15 steel wire with a diameter of 2.00 mm in the original annealed state is cold drawn for multiple passes, and the diameter of the wire is 1.05 mm. use figure 1 The shown equipment and the high-energy electric pulse online softening annealing process of the present invention process the GCr15 steel wire. figure 2 It is the metallographic structure (spheroidized annealed structure) of GCr15 steel wire before cold drawing deformation hardening, and spherical cementite is evenly distributed in the ferrite matrix. image 3 It is the metallographic structure of GCr15 steel wire after cold drawing deformation and hardening. The ferrite matrix grains are elongated into fibers, and the cementite is still spherical and distributed along the ferrite deformation direction.

[0025] refer to figure 1 , the GCr15 steel wire is driven by the uncoiling device 1 and the rewinding device 2 and is transmitted at a speed of 6m / min or 16m / min in the direction of the arrow....

Embodiment 2

[0029] Example 2: 55 steel wires originally in a work-hardened state, with a diameter of 0.98mm. use figure 1 The equipment shown and the high-energy electric pulse online continuous softening annealing process of the present invention process the 55 steel wire. Figure 5 It is the metallographic structure of 55 steel wire after work hardening, the ferrite grains are elongated into fibers, and the pearlite is distributed along the ferrite deformation direction.

[0030] refer to figure 1 , the 55 steel wire is driven by the uncoiling device 1 and the rewinding device 2 and is transmitted in the direction of the arrow at a speed of 8m / min. The positive and negative poles of the high-energy pulse power supply are respectively connected to the electrodes made of copper-coated nickel layer (the distance between the electrodes is 250mm). The energized zone segment of the 55 steel wire is subjected to continuous softening annealing treatment. The pulse width of the input high-ene...

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Abstract

The present invention relates to an on-line continuous softening annealing method of medium-high carbon steel wire by utilizing high-energy electric pulse. Said method includes the following steps: utilizing decoiling equipment and winding-up equipment to drive steel wine and make it be moved towards the winding-up equipment at a certain speed; setting a high-energy pulse power supply, said high-energy pulse power supply can continuously output high-energy electric pulse and utilizing a pair of electrodes to apply the high-energy electric pulse to the moving steel wire so as to make the steel wire undergo the process of continuously softening annealing treatment.

Description

technical field [0001] The present invention relates to softening and annealing technology for work-hardened medium-carbon steel wire and high-carbon steel wire (including high-carbon alloy steel wire, bearing steel wire, etc.), specifically an online continuous softening and annealing process for medium and high-carbon steel wires using high-energy electric pulses , after electric pulse treatment, it can finally reach the performance index of conventional annealed medium and high carbon steel wire. Background technique [0002] High carbon steel wire is widely used in steel cord for tire reinforcement, galvanized steel wire for bridge, steel wire for prestressed concrete, piano wire, bearing wire, punching needle, etc.; medium carbon steel wire is used in welding wire, steel strand, steel wire rope, Springs, etc., two kinds of steel wire occupy an important position in the industry. Medium and high carbon steel wire products are subject to heavy loads and harsh working con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/52C21D1/40C21D1/26
Inventor 唐国翌丁飞
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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