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Preparation method of CrHRB400E-containing hot-rolled ribbed steel bar product

A technology for hot-rolled ribbed steel bars and products, which is applied in heat treatment equipment, heat treatment process control, temperature control, etc., can solve the problem of high production costs of hot-rolled ribbed steel bars, and achieves reduced water spraying time, high temperature after cooling, and reduced The effect of the formation of Widmandarin microstructure

Pending Publication Date: 2021-07-09
福建三宝钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing hot-rolled ribbed steel bars containing CrHRB400E, which solves the problem of high production cost of hot-rolled ribbed steel bars in the prior art

Method used

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  • Preparation method of CrHRB400E-containing hot-rolled ribbed steel bar product
  • Preparation method of CrHRB400E-containing hot-rolled ribbed steel bar product
  • Preparation method of CrHRB400E-containing hot-rolled ribbed steel bar product

Examples

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Effect test

Embodiment 1

[0030] A preparation method containing CrHRB400E hot-rolled ribbed steel products, specifically comprising the following steps:

[0031] Step S1: Heat the continuous casting slab to the hot rolling temperature, carry out rough rolling, intermediate rolling and pre-finish rolling in sequence after being out of the furnace, perform pre-water cooling at a steel passing speed of 10m / s after the pre-finish rolling, and then carry out finish rolling, finish rolling Finally, the hot-rolled ribbed steel bar base material is obtained;

[0032] Step S2: See Figure 1-5 As shown, the hot-rolled ribbed steel bar base material is passed through the water spray cooling device, penetrated from the feed port 202, and the hot-rolled ribbed steel bar base material is passed through the temperature measuring sleeve 303 of the first temperature measuring assembly 3, Measure the temperature of the hot-rolled ribbed steel bar base material after finishing rolling, pass between two sets of water sp...

Embodiment 2

[0036] A preparation method containing CrHRB400E hot-rolled ribbed steel products, specifically comprising the following steps:

[0037] Step S1: Heat the continuous casting slab to the hot rolling temperature, and then carry out rough rolling, intermediate rolling and pre-finish rolling in sequence after the pre-finish rolling, pre-water cooling at a steel passing speed of 12m / s, and then finish rolling Finally, the hot-rolled ribbed steel bar base material is obtained;

[0038] Step S2: See Figure 1-5 As shown, the hot-rolled ribbed steel bar base material is passed through the water spray cooling device, penetrated from the feed port 202, and the hot-rolled ribbed steel bar base material is passed through the temperature measuring sleeve 303 of the first temperature measuring assembly 3, Measure the temperature of the hot-rolled ribbed steel bar base material after finishing rolling, pass between two sets of water spray cooling assemblies 6, carry out water spray cooling,...

Embodiment 3

[0042] A preparation method containing CrHRB400E hot-rolled ribbed steel products, specifically comprising the following steps:

[0043] Step S1: Heating the continuous casting slab to the hot rolling temperature, and performing rough rolling, intermediate rolling and pre-finish rolling in sequence after the pre-finish rolling, pre-water cooling at a steel passing speed of 15m / s, and then finishing rolling, Finally, the hot-rolled ribbed steel bar base material is obtained;

[0044] Step S2: See Figure 1-5 As shown, the hot-rolled ribbed steel bar base material is passed through the water spray cooling device, penetrated from the feed port 202, and the hot-rolled ribbed steel bar base material is passed through the temperature measuring sleeve 303 of the first temperature measuring assembly 3, Measure the temperature of the hot-rolled ribbed steel bar base material after finishing rolling, pass between two sets of water spray cooling assemblies 6, carry out water spray cooli...

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Abstract

The invention discloses a preparation method of a CrHRB400E-containing hot-rolled ribbed steel bar product. The method specifically comprises the following steps that S1, a continuous casting blank is heated to a hot rolling temperature, rough rolling, intermediate rolling and pre-finish rolling are sequentially carried out after discharging, pre-water cooling is carried out at a steel passing speed of 10-15 m / s after pre-finish rolling, and then finish rolling is carried out to obtain a hot-rolled ribbed steel bar base material; and S2, the hot-rolled ribbed steel bar base material penetrates through a water spraying cooling device at the conveying speed of 3-5 m / s, and after water spraying cooling, the CrHRB400E-containing hot-rolled ribbed steel bar product is obtained. Through the treatment of the process, the yield strength of the CrHRB400E-containing hot-rolled ribbed steel bar product is improved, meanwhile, excessive negative effects on the plasticity and toughness of the product are avoided, the product meets the standard index requirements, the use of alloys such as Nb, V and Ti is reduced, and the production cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled ribbed steel bar processing, and in particular relates to a preparation method of a CrHRB400E-containing hot-rolled ribbed steel bar product. Background technique [0002] With the rapid development of the real estate industry, the demand for steel bars in complex structures such as large public buildings and high-rise buildings is increasing, and the requirements for the bearing capacity of steel bars are getting higher and higher, which promotes the production of hot-rolled ribbed steel bars for construction Upgrade, the prices of Nb-Fe, V-Fe, Ti, and VN alloys, the essential raw materials of 20MnNb and 20MnSiV, the leading steel types of HRB400E hot-rolled steel bars, have risen sharply, resulting in a significant increase in production costs, adding Nb, V, Ti, etc. for microalloying The main problems in the production of HRB400E are: the use of Nb microalloying requires the temperature of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/08C22C38/20C22C38/04C22C38/02C21D11/00B21B37/76
CPCC21D8/08C22C38/20C22C38/04C22C38/02C21D11/005B21B37/76C21D2211/001
Inventor 王光文陈贵和张盛梁涂文兴
Owner 福建三宝钢铁有限公司
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