A method for formulating foundation roll gap technology of slab continuous casting machine

A slab continuous casting machine and basic technology, applied in the field of steelmaking and continuous casting, can solve problems such as single roll gap and unclear formulation principles, and achieve the effects of improving center segregation, fast and efficient product quality, and simple methods

Active Publication Date: 2018-01-23
SHOUGANG CORPORATION
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for formulating the basic roll gap process of slab continuous casting machine, which solves the problem that the basic roll gap of different steel types or processes in the current production process is single, and the formulating principle is not clear

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  • A method for formulating foundation roll gap technology of slab continuous casting machine
  • A method for formulating foundation roll gap technology of slab continuous casting machine
  • A method for formulating foundation roll gap technology of slab continuous casting machine

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Embodiment Construction

[0044] The basic roll gap technology of the slab continuous casting process with a section of 150mm×1700mm and 200mm×1700mm was calculated respectively, and the corresponding casting speeds were 1.8m / min and 1.4m / min respectively. Table 1 shows the relevant casting machine equipment parameters and technology parameter.

[0045] Table 1 continuous casting process parameters

[0046]

[0047] The specific steps and parameters are as follows:

[0048] 1. The calculated steel type is Q345C, and its instantaneous thermal expansion coefficient in the range from room temperature to liquidus can be calculated and measured by commercial software JmatPro. figure 1 It is the relationship between the instantaneous thermal expansion coefficient and temperature of Q345C.

[0049] 2. Solidification heat transfer model calculation: establish a finite element analysis model suitable for a specific slab caster, use a 1 / 4 section as the calculation domain, and develop a subroutine suitable ...

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Abstract

The invention discloses a formulating method of a slab continuous casting machine foundation roller gap technology, and belongs to the technical field of steelmaking and continuous casting. The method comprises the steps of measuring and calculating steel grade thermophysical parameters, and through the test means and application of business software JmatPro, calculating an instantaneous thermal expansion coefficient from a liquid phase line to the room temperature range under the cooling condition of the stele grade in the continuous casting technology; calculating a solidification and heat transfer model, and secondarily developing shrinkage calculating of a casting blank in a subprogram plotv.f; carrying out finite element analytical calculation, obtaining the casting blank thickness values of the casting blank at different positions inside a continuous casting machine, and converting the casting blank thickness values into solidification shrinkage amounts or sector-shaped segment tapers in all sector-shaped segments of the slab continuous casting machine; and the method has the beneficial effects that the center segregation of the casting blank is avoided, or, the center porosity defect is overcome, and the method is simple, economic and efficient.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and continuous casting, and in particular relates to a method for formulating a basic roll gap process of a slab continuous casting machine. Background technique [0002] The basic roll gap technology of the casting machine in the continuous casting process is an important link that affects the smooth production and the internal quality of the slab. When the roll gap value of the casting machine is greater than the actual solidification shrinkage value of the slab, it will cause bulging on the wide surface of the slab, especially at the end of solidification. The flow in the center of billet intensifies the formation of center segregation and porosity. When the roll gap is smaller than the actual slab thickness, the drawing resistance will increase. Therefore, accurately determining the thermal shrinkage behavior of a given steel grade from the mold to the end of the continuous casting machi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16
CPCB22D11/16
Inventor 刘珂孙齐松王立峰刘洋丁宁徐士新吕迺冰佟倩陈涛王畅
Owner SHOUGANG CORPORATION
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