Batch annealing process-based cold rolled weathering resistant steel and manufacturing method thereof

A bell-type annealing and manufacturing method technology, which is applied in the field of metal materials, can solve problems such as buckling and easy bonding, and achieve the effects of improved formability, excellent atmospheric corrosion resistance, and excellent welding performance

Inactive Publication Date: 2020-01-17
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Compared with the prior art, the present invention provides a cold-rolled weathering steel based on bell annealing process and its manufacturing method, through reasonable chemical composition

Method used

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  • Batch annealing process-based cold rolled weathering resistant steel and manufacturing method thereof
  • Batch annealing process-based cold rolled weathering resistant steel and manufacturing method thereof
  • Batch annealing process-based cold rolled weathering resistant steel and manufacturing method thereof

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Example Embodiment

[0034] The technical solution of the present invention is described below through specific embodiments.

[0035] In order to realize the cold-rolled weather-resistant steel sheet mentioned in this patent, the example is as follows:

[0036] Table 1 is a chemical composition table of each group of examples, and the rest are inevitable impurities and Fe.

[0037] Table 1 Chemical composition table of each group of examples

[0038]

[0039]

[0040] After the molten steel in each group of the examples in the table is continuously cast, it undergoes seven-stand hot continuous rolling, pickling, five-stand full six-roll cold continuous rolling, electrolytic degreasing, cover annealing, wet leveling and other processes. The main process parameters are shown in the table 2. The final performance is shown in Table 3.

[0041] Table 2 Production process parameters

[0042]

[0043] The performance of each instance is shown in Table 3.

[0044] Table 3 Mechanical properties of each embodiment

[0...

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Abstract

The invention discloses batch annealing process-based cold rolled weathering resistant steel and a manufacturing method thereof. The cold rolled weathering resistant steel comprises the following chemical components in percentage by weight: 0.06-0.10 % of C, 0.25-0.45 % of Si, 0.35-0.50 % of Mn, 0.080-0.120 % of P, not greater than 0.015 % of S, 0.008-0.030 % of Als, 0.12-0.20 % of Ni, 0.25-0.30 %of Cu, 0.30-0.50 % of Cr, not greater than 0.0080 % of N and the balance Fe and inevitable impurities. According to the cold rolled weathering resistant steel, by reasonable chemical component design, and by hot rolling process control, an acid rolling process and a batch annealing process, the cold rolled weathering resistant steel of which the surface quality grade is above the FB grade, the strip shape is good, the material yield strength is higher than 310-350 MPa, the tensile strength is higher than 450-500 MPa and the yield ratio is not greater than 0.75 is obtained, and the cold rolledweathering resistant steel has high stamping formability, an excellent welding property and high atmospheric corrosion resistance.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a method for producing cold-rolled weathering steel based on a bell annealing process. Background technique [0002] Atmospheric corrosion-resistant steel plates, also known as weather-resistant steels, are widely used in industries such as railway carriages, highway guardrails, bridge structural steel, and ship containers. The weather-resistant steel plate not only needs to have certain corrosion resistance, but also needs higher strength and better welding performance. Due to the structural requirements, hot-rolled weather-resistant steel plates are widely used. However, with the development of society, the steel for carriages, containers and some structures needs to be lightweight and stamped into complex-shaped parts. Therefore, the demand for cold-rolled weather-resistant steel plates is also increasing. [0003] The domestic patent publication number is CN106636897A, a low-a...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C21D8/02C21D1/74C21D1/26
CPCC21D1/26C21D1/74C21D8/0226C21D8/0236C21D8/0242C21D8/0247C22C38/02C22C38/04C22C38/06C22C38/42
Inventor 俞波汪建威王占业杨平汤亨强李进贾幼庆吴浩胡笛唐东东王安全王成成张涛
Owner MAANSHAN IRON & STEEL CO LTD
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