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A crb600h without low temperature annealing treatment and its rolling process

A low-temperature annealing and process technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problem of high production cost, and achieve the effect of increasing the reduction rate of the rolling area, saving production costs, and increasing the number of openings

Active Publication Date: 2020-01-31
ANHUI BRC & MA STEEL WELDMESH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is obvious that heat treatment must be carried out when producing high-ductility cold-rolled ribbed steel bars, and low-temperature tempering is used to improve the elongation of steel bars, and the production cost is high

Method used

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  • A crb600h without low temperature annealing treatment and its rolling process
  • A crb600h without low temperature annealing treatment and its rolling process
  • A crb600h without low temperature annealing treatment and its rolling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition and weight percentage of CRB600H omitting the low-temperature annealing treatment described in this embodiment: C content is 0.22%, Si content is 0.44%, Mn content is 0.68%, P content is 0.033%, S content is 0.011%, N content The content of Cr is 0.005%, the content of Cr is 0.33%, the content of V is 0.030%, and the rest is Fe and unavoidable impurities.

[0029] The CRB600H rolling process that omits the low-temperature annealing treatment described in this embodiment includes the following steps:

[0030] (1) Base metal preparation: converter smelting → billet continuous casting → high-speed line controlled rolling and controlled cold rolling to obtain a round wire rod; the composition and weight percentages of the round wire rod:: C content is 0.22%, Si content is 0.44%, Mn content is 0.68%, P content is 0.033%, S content is 0.011%, N content is 0.005%, Cr content is 0.33%, V content is 0.030%, and the rest is Fe and unavoidable impurities;

[0031]...

Embodiment 2

[0039] Table 1 shows the components and weight percentages of the CRB600H that omits the low-temperature annealing treatment in this embodiment.

[0040] The rolling process of the CRB600H that omits the low-temperature annealing treatment described in this embodiment is the same as that in Embodiment 1.

[0041] The properties of the CRB600H rolled and formed in this embodiment are shown in Table 1.

Embodiment 3

[0043] Table 1 shows the components and weight percentages of the CRB600H that omits the low-temperature annealing treatment in this embodiment.

[0044] The rolling process of the CRB600H that omits the low-temperature annealing treatment described in this embodiment is the same as that in Embodiment 1.

[0045] The properties of the CRB600H rolled and formed in this embodiment are shown in Table 1.

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Abstract

The invention discloses CRB600H prepared without low-temperature annealing treatment, and a rolling process thereof, and relates to the technical field of metallurgy. The CRB600H comprises the following components in percentage by weight: 0.18%-0.25% of C, 0.35%-0.45% of Si, 0.5%-1.2% of Mn, 0.01%-0.04% of P, 0.01%-0.02% of S, 0.003%-0.007% of N, 0.1%-0.5% of Cr, 0.020%-0.040% of V, and the balance Fe and inevitable impurities. The rolling process for the CRB600H mainly comprises the following steps: base metal preparation, loading for round wire rods onto a production line, mechanical descaling, lubrication, pre-rolling ribbing and drawing, stress relief, and winding. The CRB600H prepared without the low-temperature annealing treatment does not need to be subjected to the low-temperatureannealing treatment, and the extensibility of the CRB600H is excellent while the yield strength and the tensile strength of the CRB600H reach the standards. The rolling process for the CRB600H prepared without the low-temperature annealing treatment is simple, saves the production cost, avoids the resource waste, achieves energy conservation and environment protection, and increases the economic benefits.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a CRB600H which omits low-temperature annealing treatment and its rolling process. Background technique [0002] In the metallurgical industry, hot-rolled round wire rods can be cold-rolled and tempered to obtain cold-rolled ribbed steel bars with high ductility; GB / T13788-2017 requires the mechanical properties of CRB600H with high ductility for rolling and forming Satisfy the following conditions: A≥14%, Rm / Rp0.2≥1.05, Agt≥5%. At present, hot-rolled round wire rods of steel types such as 20MnSi, Q215, and Q215 are usually selected, and the round wire rods are cold-rolled and formed, and then tempered at low temperature by electromagnetic induction heating to improve elongation properties, thereby obtaining CRB600H, whose elongation Only 14% to 16%; moreover, the production line of CRB600H with low-temperature tempering treatment is complex and expensive, with low production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24B21B1/16B21B45/02
CPCB21B1/16B21B45/0203C22C38/001C22C38/02C22C38/04C22C38/24
Inventor 万恩三吴坚缪应零秦建国宋强于同仁
Owner ANHUI BRC & MA STEEL WELDMESH
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