Preparation method of high-ductility cold-rolled ribbed steel bar

A cold-rolled ribbed steel bar, high ductility technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve problems such as unsatisfactory engineering, low elongation of steel bars, long production cycle, etc., to improve misalignment performance , good anti-corrosion ability, and the effect of saving the amount of steel bars

Pending Publication Date: 2020-12-18
马鞍山延隆新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The requirements for the elongation of steel bars in various projects are gradually increasing, but at present, most domestic manufacturers produce high-ductility cold-rolled ribbed steel bars. Unable to meet engineering needs

Method used

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  • Preparation method of high-ductility cold-rolled ribbed steel bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method for high-ductility cold-rolled ribbed steel bar, comprising the following steps:

[0022] (1) Feeding: With Q235 low-carbon steel hot-rolled wire rod as raw material, the raw material coil is hoisted by the crane to the empty core rod of the pay-off machine, and the coil on the core rod is moved from the horizontal to Turn over to the vertical pay-off station, and repeat the above actions if multiple feedings are required. The wire defense machine adopted in this step adopts a twist-free pay-off system, and its quantity can be multiple.

[0023] (2) Butt welding: Manually connect and fix the end of the last coil of steel and the beginning of the next coil of steel by welding, avoiding the trouble of frequent exchange of steel coils.

[0024] (3) Phosphorus removal: A layer of oxide scale will be formed on the surface of the steel bar on the raw material coil due to contact with air and water. After testing, the oxide scale content in the raw materi...

Embodiment 2

[0034] The preparation method of the high-ductility cold-rolled ribbed steel bar of this example is similar to that of Example 1, except that the heat treatment temperature is 600°C.

Embodiment 3

[0036] The preparation method of the high-ductility cold-rolled ribbed steel bar of this example is similar to that of Example 1, except that the heat treatment temperature is 630°C.

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Abstract

The invention provides a preparation method of a high-ductility cold-rolled ribbed steel bar. The preparation method of the high-ductility cold-rolled ribbed steel bar comprises an unwinding step, a cold rolling step, a heat treatment step and a winding step, and is characterized in that the cold rolling step comprises three passes of active rolling, and the tempering temperature of the heat treatment step is 540 to 630 DEG C; and a warm rolling forming step performed by utilizing heat energy of the heat treatment step is included between the heat treatment step and the winding step. Accordingto the preparation method, a production process combining active rolling and online tempering is adopted, so that the product is good in ductility and high in strength; a layer of rust-proof oxidation film can be formed on the surface, so that the rust-proof capacity is good, high fullness and uniformity are achieved, and the steel bar staggered solidification performance is improved; the tensilestrength of the produced steel bar is obviously higher than the tensile strength of a common ribbed steel bar, so that the steel bar consumption can be saved in construction engineering application;the high-ductility cold-rolled ribbed steel bar is particularly suitable for reinforcement of plate components, is also suitable for stress main ribs of medium and small prestressed components, and can replace smooth cold-drawn low-carbon steel wires; and when the cold-rolled ribbed steel bar is bent, cracks are not generated on the surface of a bent part.

Description

technical field [0001] The invention mainly relates to the relevant technical field of steel bar preparation, in particular to a method for preparing high-ductility cold-rolled ribbed steel bars. Background technique [0002] Cold-rolled ribbed steel bar is a kind of steel bar with two or three crescent shapes formed by hot-rolled wire rod through multiple cold-rolling reductions, one rib pressing and internal stress relief, and its elongation is low. [0003] The requirements for the elongation of steel bars in various projects are gradually increasing, but at present, most domestic manufacturers produce high-ductility cold-rolled ribbed steel bars. Unable to meet engineering needs. Contents of the invention [0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for preparing high ductility cold-rolled ribbed steel bars, the tensile strength of the high-ductility cold-rolled ribbed steel bars made by ...

Claims

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Application Information

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IPC IPC(8): B21B1/18B21B39/00C21D9/52C21D8/06
CPCB21B1/18B21B39/002C21D9/525C21D8/065
Inventor 黄贞益范鼎东王道远张宁飞黄华钦王萍王必成
Owner 马鞍山延隆新材料科技有限公司
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