Technique for CSP sheet billet production line cold rolling feeding

A process method and production line technology, applied in the field of metallurgical steel rolling

Inactive Publication Date: 2007-03-14
HEBEI IRON AND STEEL
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a process method for cold rolling feeding of CSP thin slab production line. By optimizing the relevant process parameters of temperature system and deformation system, the method can obtain Normal ferrite and pearlite structure, and can reduce the grain size level of the finished product, reduce the yield strength, and increase the elongation, so as to meet the subsequent processing requirements

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  • Technique for CSP sheet billet production line cold rolling feeding

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Embodiment Construction

[0012] The present invention aims at the low-carbon steel produced by the CSP conventional process, which is easy to generate cementite at the ferrite grain boundary and the reduction rate of the roughing mill is too small, resulting in fine grains, which is not conducive to the subsequent processing requirements. The coiling temperature and The rolling reduction rate was optimized by process parameters. In terms of coiling temperature, a large number of comparative tests were carried out on the room temperature microstructure of low carbon steel with different coiling temperatures, and combined with the actual working capacity of the laminar cooling line to find out the optimized cold-rolled feeding material coiling temperature process parameters. The main improvements are: breakthrough The production of low-carbon steel by CSP conventional process generally adopts a high-temperature coiling process plan higher than 670°C, and implements coiling at a lower temperature of about...

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Abstract

The invention relates to a method for cold rolling material feeding of CSP sheet product line. Wherein, it comprises temperature control rule and deformation control rule; and the improved temperature rule comprises the outlet steel temperature of heating furnace is 1045-1062Deg. C, the final rolling temperature is 860-880Deg. C, the coiling temperature is 625-635Deg. C, and the compress rate of rough roller is 48.5-50.3%. The invention via lots of comparison tests can fine optimized coiling temperature and compress rate, to low-temperature coil at 630Deg. C and improve the compress rate of R1 rough roller. And it can obtain normal ferrite and pearlite, without additive, to reduce the yield strength of steel band.

Description

technical field [0001] The invention relates to a steel rolling process, in particular to the temperature regime and deformation regime of cold rolling feed materials for a CSP thin slab production line, and belongs to the technical field of metallurgical steel rolling. Background technique [0002] Steel rolling is a main processing method in metal pressure processing. Rolling can cause permanent deformation of cast slabs or steel ingots, and can also change their internal looseness and porousness, coarse and uneven grain structure, and serious segregation. The process parameters mainly controlled in the rolling process are deformation system, temperature system, etc. Reasonably formulating these process parameters can obtain the required grain and structure, and can make the steel obtain the required comprehensive mechanical properties. [0003] CSP thin slab production line is different from low-carbon steel plate produced by conventional CSP process. It is required to re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B37/58B21B37/00C21D11/00C21D9/70
Inventor 吝章国谷凤龙张玉道孙洪利吕德文
Owner HEBEI IRON AND STEEL
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