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Parent metal dedicated to cold rolled reinforcing steel bar with ribs

A cold-rolled ribbed steel bar and base metal technology, applied in metal rolling and other directions, can solve the problems of large fluctuations in the chemical composition of wire rods, contain inclusions, affect output and quality, and improve the technical level and engineering quality and strength. Complete grades and specifications, reducing the consumption of raw materials

Inactive Publication Date: 2006-04-19
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the raw materials used in existing cold-rolled ribbed steel bars are low-carbon hot-rolled wire rods for construction, and there are the following problems in the use process: 1) The quality of hot-rolled wire rods is not good, the oxide scale on the surface of the wire rods is thick, and the size tolerance Larger, directly affects the rolling pass rate of cold-rolled ribbed steel bars
2) The chemical composition of the wire rod fluctuates greatly and has high S and P content, and it is easy to segregate and contains inclusions, so that the wire rod often breaks due to composition segregation or high content of inclusions during the drawing process, which affects the cold-rolled ribbed steel bars. The production output affects the product quality of cold-rolled ribbed steel bars
3) The performance of the wire rod is not uniform, so that under normal production conditions, the cold-rolled ribbed steel bar will have a section of qualified and a section of unqualified
4) Low-carbon hot-rolled wire rods for construction cannot meet the needs of producing cold-rolled ribbed steel bars of different strength levels
Due to the above deficiencies, the pass rate of cold-rolled ribbed steel bars is low, which directly affects its output and quality. Therefore, it is necessary to improve the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Steel with the following chemical composition: C 0.14wt%, Si 0.10wt%, Mn 0.40wt%, S≤0.035wt%, P≤0.035wt%, the rest is Fe and unavoidable impurities. The special base material for cold-rolled ribbed steel bars is obtained by rolling through the following process: the steel billet is sent to a heating furnace with a temperature of 1000-1150 °C and heated until the billet temperature reaches 950-1050 °C, and the rolling is started, and rough rolling is performed for 6 passes After 6 passes of primary and intermediate rolling and 6 passes of pre-finishing rolling, finish rolling is carried out at a temperature of 800-920°C. 0.20~0.50m / s, turn on the fan to cool the wire rod temperature from 850~900°C to 700~800°C, open the fan and all covers on the roller table to cool the wire rod from 600~700°C to 400~500°C, Then collect the rolls to obtain the base material with the brand name TS460L.

Embodiment 2

[0012] Get the billet of following chemical composition: C 0.22wt%, Si 0.30wt%, Mn 0.65wt%, S≤0.035wt%, P≤0.035wt%, the rest are Fe and unavoidable impurities, and according to embodiment 1 The same rolling process is rolled to obtain the special base material for cold-rolled ribbed steel bars.

Embodiment 3

[0014] Get the billet of following chemical composition: C 0.18wt%, Si 0.20wt%, Mn 0.55wt%, S≤0.035wt%, P≤0.035wt%, the rest are Fe and unavoidable impurities, and according to embodiment 1 The same rolling process is rolled to obtain the special base material for cold-rolled ribbed steel bars.

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PUM

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Abstract

A mother material dedicated for cold-rolling ribbed reinforcing bar contains C (0.14-0.22 Wt %), Si (0.10-0.30), Mn (0.40-0.65), P (0-0.035) and Fe (rest). The rolled reinforcing bar features high size precision, surface quality, strength and stability.

Description

technical field [0001] The invention relates to a special base material for cold-rolled ribbed steel bars, which belongs to the design and manufacture of metal materials [0002] technology field. Background technique [0003] Cold-rolled ribbed steel bar is a new type of high-efficiency construction steel introduced into my country in the 1980s. It has the characteristics of high strength, strong binding force with concrete, and can save steel and cement. For example, in cast-in-place concrete slabs, using cold-rolled ribbed steel bars can save more than 30% of steel; Improve the quality of concrete, so it is widely used. However, most of the raw materials used in existing cold-rolled ribbed steel bars are low-carbon hot-rolled wire rods for construction, and there are the following problems in the use process: 1) The quality of hot-rolled wire rods is not good, the oxide scale on the surface of the wire rods is thick, and the size tolerance Larger, directly affects the ...

Claims

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Application Information

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IPC IPC(8): C22C38/04B21B1/16
Inventor 苏鹤洲张卫强王志雄宾石函李金柱杨顺武邓家木李志敏
Owner WUKUN STEEL