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22A wire rod modification method

A technology for wire rods and semi-finished products, which is applied in the field of metal transformation, can solve the problems of wire rod surface scars, increase production cycle and process costs, and achieve the effects of preventing surface strain, remarkable gas supply stability, and reducing decarburization

Pending Publication Date: 2022-04-08
中天钢铁集团南通有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production mode of the cold heading steel wire drawing industry is based on sales and production. The pickling lime process needs to send the wire rod to the pickling lime production line for processing, which not only increases the production cycle and process cost, but also the surface of the wire rod during the turnover process. partial scars

Method used

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  • 22A wire rod modification method
  • 22A wire rod modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Take Ø6.5mm22A as an example to illustrate the finished steel wire of Ø2.59mm

[0056] A kind of technology that 22A wire rod is remanufactured into finished steel wire has the following steps:

[0057] 1. First install the Ø6.5mm 22A wire rod on the special rack and cut off all the packing tapes;

[0058] 2. Send the 22A wire rod processed in step 1 to the special rack for high-speed continuous drawing. The 22A wire rod passes through 6 sets of roller continuous drawing machines, and the area reduction rates are 28.4%, 28.52%, 27.84%, and 21.49% respectively. , 21.55%, pull the Ø6.5mm wire rod to Ø2.75±2mm and install it on the take-up reel.

[0059] 3. Send the 22A semi-finished product after high-speed online drawing in step 2 to the continuous annealing furnace for spheroidizing annealing, and use RX gas and nitrogen as the protective gas for spheroidizing. RX gas consumption is 26m3 / h, nitrogen consumption is 60 m3 / h. The composition of RX gas is CO: 19-21%; H2:...

Embodiment 2

[0064] Take Ø6.5mm22A as an example to illustrate the finished steel wire of Ø2.65mm

[0065] A kind of technology that 22A wire rod is remanufactured into finished steel wire has the following steps:

[0066] 1. First install the Ø6.5mm 22A wire rod on the special rack and cut off all the packing tapes;

[0067] 2. Send the 22A wire rod processed in step 1 to the special rack for high-speed continuous drawing. The 22A wire rod passes through 6 sets of roller continuous drawing machines, and the area reduction rates are 28.4%, 28.52%, 27.84%, and 21.49% respectively. , 21.55%, pull the Ø6.5mm wire rod to Ø2.75±2mm and install it on the take-up reel.

[0068] 3. Send the 22A semi-finished product after high-speed online drawing in step 2 to the continuous annealing furnace for spheroidizing annealing, and use RX gas and nitrogen as the protective gas for spheroidizing. RX gas consumption is 26m3 / h, nitrogen consumption is 60 m3 / h. The composition of RX gas is CO: 19-21%; H2:...

Embodiment 3

[0073] Take Ø6.5mm22A as an example to illustrate the finished steel wire of Ø2.72mm

[0074] A kind of technology that 22A wire rod is remanufactured into finished steel wire has the following steps:

[0075] 1. First install the Ø6.5mm 22A wire rod on the special rack and cut off all the packing tapes;

[0076] 2. Send the 22A wire rod processed in step 1 to the special rack for high-speed continuous drawing. The 22A wire rod passes through 6 sets of roller continuous drawing machines, and the area reduction rates are 28.4%, 28.52%, 27.84%, and 21.49% respectively. , 21.55%, pull the Ø6.5mm wire rod to Ø2.75±2mm and install it on the take-up reel.

[0077] 3. Send the 22A semi-finished product after high-speed online drawing in step 2 to the continuous annealing furnace for spheroidizing annealing, and use RX gas and nitrogen as the protective gas for spheroidizing. RX gas consumption is 26m3 / h, nitrogen consumption is 60 m3 / h. The composition of RX gas is CO: 19-21%; H2:...

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Abstract

The invention discloses a 22A wire rod modification method which specifically comprises the following steps: drawing a wire rod through a high-speed continuous drawing machine, carrying out spheroidizing annealing on the wire rod in a continuous annealing furnace by introducing RX gas, carrying out acid pickling on the wire rod, rinsing, carrying out secondary flushing, carrying out oxalic acid treatment, phosphating, rinsing and saponifying, and drawing a semi-finished product into a finished product through a fine drawing machine. The high-speed continuous drawing machine adopts six groups of roller continuous drawing machines, the area reduction rates are respectively 28.4%, 28.52%, 27.84%, 21.49% and 21.55%, the rotating speed of the rollers can reach 900r / min, the production efficiency is two times that of the traditional high-speed continuous drawing machine, 6.5 mm wire rods are drawn to 2.75 + / -0.02, the out-of-roundness is less than or equal to 0.03 mm, the quality requirement is met, the production yield is improved, and the comprehensive production cost is reduced.

Description

technical field [0001] The invention relates to a method for remanufacturing a wire rod, in particular to a method for remanufacturing a 22A wire rod, and belongs to the technical field of metal remanufacturing. Background technique [0002] Metal reforming refers to the technical processing method that makes the metal pass through the mold forcibly under the action of external force, the metal cross-sectional area is compressed, and the required cross-sectional area shape and size are obtained. The tool that changes the shape and size is called a wire drawing die. [0003] The general process flow of 22A wire rod is: wire rod - pickling lime - drawing semi-finished product - heat treatment - pickling and phosphating - refined finished product - shipment. [0004] Surface treatment is required after the wire rod is drawn, and the surface treatment is divided into: 1. Pickling- pickling, flushing and placing outside to produce oxidation, the purpose is to remove stubborn atta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/12B21C9/00B08B3/02B08B3/08C21D1/32C21D1/773C21D8/06C23C8/22C23C22/73C23G1/08
Inventor 韩全喜
Owner 中天钢铁集团南通有限公司