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Method for producing hrb600e threaded steel bars from high-speed bars and hrb600e threaded bars produced from high-speed bars

A technology of threaded steel bars and bars, which is applied in the field of HRB600E threaded steel bars and high-speed bar production of HRB600E threaded steel bars, can solve the problems of difficulty in producing strong steel bars, and achieve the effects of high production efficiency, lower production costs, and lower alloy additions.

Active Publication Date: 2022-03-04
广西柳钢华创科技研发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the embodiments of the present invention is that it is difficult for a high-speed bar production line to generate a yield ratio R o m / R o eL Problems with HRB600E threaded steel bars greater than or equal to 1.25

Method used

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  • Method for producing hrb600e threaded steel bars from high-speed bars and hrb600e threaded bars produced from high-speed bars
  • Method for producing hrb600e threaded steel bars from high-speed bars and hrb600e threaded bars produced from high-speed bars
  • Method for producing hrb600e threaded steel bars from high-speed bars and hrb600e threaded bars produced from high-speed bars

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Embodiment

[0062] 1. The production process of Φ10~25mm straight threaded steel bar with double-line high speed is: blast furnace hot metal smelting, hot metal desulfurization pretreatment, converter molten steel smelting, argon blowing, LF refining, billet continuous casting, heating furnace heating, rough rolling (6 stand), intermediate rolling (6 stands), pre-finishing rolling (6 stands) and split into double lines, controlled cooling and recovery section × 2, finish rolling (4 stands) × 2, cut diameter 2 stands × 2, post-rolling Cooling control and recovery section × 2, pinch roller × 2, disc scale shear × 2, brake device × 2, hub device × 2, cooling bed cooling, cut to length, inspection and packaging for storage.

[0063] 2. The billet heating time is 60-90 minutes, and the rolling start temperature is 1010-1050°C.

[0064] 3. Adopt the following composition ratio and specific process. Wherein, Table 4 is the composition (by weight percentage) of the steel of each embodiment. Tab...

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Abstract

The invention provides a method for producing HRB600E threaded steel bars from high-speed bars and the HRB600E threaded bars produced by high-speed bars. The method for producing HRB600E threaded bars from high-speed bars comprises the following steps in sequence: blast furnace hot metal smelting and hot metal desulfurization Pretreatment, converter molten steel smelting, argon blowing, LF refining, billet continuous casting, heating furnace heating, rough rolling, intermediate rolling, pre-finishing, pre-finishing controlled cooling and recovery, finishing rolling, post-rolling controlled cooling and recovery; The composition of the HRB600E threaded steel bar produced from the high-speed bar is: C: 0.23-0.28Wt%, Si: 0.65-0.80Wt%, Mn: 1.25-1.45Wt%, P: ≤0.04Wt%, S: ≤0.035Wt% , V: 0.065-0.10Wt%, Nb: 0.008-0.02Wt%, N: 0.015-0.028Wt%, B: 0.0015-0.0035Wt%, Cr: 0.1-0.2Wt%. The production cost is reduced, the production efficiency is high, and the surface quality is good.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing HRB600E threaded steel bars from high-speed bars and the HRB600E threaded bars produced from high-speed bars. Background technique [0002] The appearance and size of steel bars produced by high-speed bars are well controlled and the final rolling speed can reach 45m / s and above. It has the advantages of high output, high quality and low cost. It is the current development trend of small and medium-sized rebar production. Due to the fast deformation of high-speed bars and the use of controlled rolling and controlled cooling technology, the production of HRB400E steel bars with finer grains has been realized. However, when producing HRB600E steel bars with higher strength, the contribution of fine-grain strengthening to the yield strength is large, but the contribution to the tensile strength is weak, and it is difficult to meet the group standard T / CISA 026-2020 "...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/26C22C38/32C21D8/06C21D8/08C22C33/04
CPCC22C38/02C22C38/04C22C38/001C22C38/24C22C38/26C22C38/32C22C33/04C21D8/08C21D8/065
Inventor 钱学海蒙曰睿吴海林潘刚陈学良李西德何维周从锐李显肖娟
Owner 广西柳钢华创科技研发有限公司