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Preparation method for Mn-Ti low-carbon steel through TMCP production

A low-carbon steel and production line technology, applied in the field of low-carbon steel production technology, can solve the problems of low finishing temperature and coiling temperature, inhomogeneous material structure, large grain size, etc., and achieve high steel quality, microstructure and Excellent mechanical properties

Inactive Publication Date: 2015-01-28
ZHONGBEI UNIV
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  • Application Information

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Problems solved by technology

[0003] The existing TMCP process of Mn-Ti low carbon steel has low finish rolling temperature and coiling temperature, the structure of the material after rolling is not uniform enough, there are more polygonal ferrite in the structure, and its grain size is large

Method used

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  • Preparation method for Mn-Ti low-carbon steel through TMCP production
  • Preparation method for Mn-Ti low-carbon steel through TMCP production
  • Preparation method for Mn-Ti low-carbon steel through TMCP production

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Embodiment Construction

[0014] A kind of TMCP production preparation method of Mn-Ti low carbon steel, flow process is as figure 1 As shown, including smelting, blanking, hot rolling and coiling, when blanking and hot rolling, the composition is Fe-0.091C-0.2Si-2.2(Mn+Ti+Cr)-0.027Nb-0.0022B-0.0168P- The continuous casting slab of 0.0013S is hot sent to the 2250 hot continuous rolling production line, the final rolling temperature is set at 860oC, and the final rolling thickness is 8mm; when crimping, the hot rolled plate is cooled at a speed of 10-30oC / s to Curling was carried out at 290°C, and air cooling was performed after crimping.

[0015] At the same time, the same process is used to change the process parameters to prepare TMCP for Mn-Ti low carbon steel. The rolling process of each process is completed on the 2250 hot rolling production line, and the total of each rolling process The amount of reduction is the same. After the material is crimped and formed, samples are taken along the rollin...

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Abstract

The invention provides a preparation method for Mn-Ti low-carbon steel through TMCP production. The preparation method comprises the steps of hot-sending a continuous casting slab having specific components to a 2250 hot-rolling production line, setting a finishing temperature at 860 DEG C and a finishing thickness at 8 mm; carrying out curling when the hot-rolled sheet material is cooled to a temperature of 290 DEG C at a speed of 10-30 DEG / C, and air-cooling after curling. According to the TMCP method and parameters provided by the invention, the Mn-Ti low-carbon steel with relatively high steel quality and excellent microstructure and mechanical properties can be obtained, thereby providing reference for making a large-scale production process of the Mn-Ti low-carbon steel.

Description

technical field [0001] The invention relates to a production process of low-carbon steel, in particular to a TMCP production and preparation method of Mn-Ti low-carbon steel. Background technique [0002] In recent years, the manufacturing fields of automobiles, construction machinery, trains, ships, and oil pipelines have strongly demanded steel grades with high strength, good formability and toughness. The emergence and development of controlled rolling and controlled cooling (TMCP) technology can produce hot-rolled coils more efficiently and energy-saving. Then, how to use TMCP technology to design reasonable controlled rolling and controlled cooling process parameters to achieve target microstructure control and obtain high-strength steel with better comprehensive mechanical properties is very important for its industrial production. [0003] The existing TMCP process of Mn-Ti low carbon steel has low finish rolling temperature and coiling temperature, the structure of ...

Claims

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Application Information

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IPC IPC(8): C21D8/02
Inventor 李大赵刘涛窦进李晓楠郭菲
Owner ZHONGBEI UNIV