Rolling pressure setting method of precision rolling phase-change strip steel

Abstract

The invention discloses a rolling pressure setting method of precision rolling phase-change strip steel; and a formula for calculating the impact of temperature on deformation strength is set up by considering the volume fraction of rolled piece austenitic deformation and ferrite deformation, so that the rolling pressure setting precision of phase-change strip steel in a two-phase area and a ferrite area is significantly improved, and the purposes of improving the strip steel thickness control precision and production stability are achieved. According to the technical scheme, because a phase-change volume fraction calculation model in a cosine form and a deformation strength impact calculation formula in a weighted form are adopted in the double-phase area, the deformation characteristic of a rolled piece in the double-phase area can be better simulated, so that the matching with an actual rolling result is very high.

Description

technical field [0001] The invention relates to a strip rolling method, in particular to a method for setting rolling pressure in the strip rolling process. Background technique [0002] In the hot-rolled strip production process, the setting model of the finishing mill is the main part of the core technology. For a long time, improving the accuracy of the setting model of the finishing mill has been the main direction of research. The accuracy of the strip head and tail thickness mainly depends on the accuracy of the rolling pressure setting in the finishing mill setting. Therefore, in order to meet the increasing dimensional accuracy requirements of users, it is necessary to improve the flexibility and accuracy of the finishing mill setting, and the rolling pressure setting is the core of the computer setting model of the hot continuous rolling finishing mill, and its prediction accuracy It directly affects the setting of the roll gap and affects the stability of the bel...

AI Technical Summary

Problems solved by technology

[0006] (1) The continuity problem of the three-stage expression at the transfer point is not solved. When the temperature of the finishing stand fluctuates just near the transfer point, there will be a relatively large deviation in the setting of the rolling force, which will affect the rolling stability;

[0007] (2) The reference temperature of the third section is obtained from the critical rheological stress change curve obtained by the test, which increases the test cost and is inconvenient to use in the actual production process

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