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Physical simulating method and device during continuous-casting billet coagulation tissue growth process

A technology of solidification structure and growth process, applied in the field of metal crystalline phase heat treatment processing, can solve the problems of difficult research work, high cost, lack of directness, etc.

Inactive Publication Date: 2007-11-21
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method lacks directness and is not directly related to coagulation tissue
In addition, even though industrial experiments can solve many problems that are difficult to solve with simulation techniques, their high cost prohibits people from carrying out extensive and effective research work.

Method used

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  • Physical simulating method and device during continuous-casting billet coagulation tissue growth process
  • Physical simulating method and device during continuous-casting billet coagulation tissue growth process
  • Physical simulating method and device during continuous-casting billet coagulation tissue growth process

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Experimental program
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Effect test

Embodiment 1

[0028] Referring to Fig. 1, Fig. 1 is the schematic diagram of the method for simulating the solidification structure growth process in the continuous casting process of the present invention. In this method, three function control programs are mainly designed and set as the research means of this method. They are:

[0029] (1) Functional heating control program for the center temperature of the slab thermal simulation unit;

[0030] (2) A function control program that can adjust the cooling intensity of the cooling system;

[0031] (3) A function control program that can control the moving speed or stretching rate of the draw bar or tie rod; that is, the function control program that can control the solidification growth rate of the slab shell.

[0032] The growth process of the solidification structure in the simulated continuous casting process is mainly studied through the cooperation of the above three function control programs.

[0033] Referring to Fig. 2, Fig. 2 is a...

experiment example 1

[0042] Using 1Cr18Ni9Ti austenitic stainless steel as the base material, a test rod with a diameter of 7 mm was made, placed in a high-purity corundum crucible, heated to 1350 ° C, and kept for 20 min. The stretching curve is set according to the growth and stretching of the slab shell during the slab continuous casting process, and the displacement time equation of the stretching curve is:

[0043] d s = K · t ,

[0044] The velocity-time equation is:

[0045]

[0046] The coagulation coefficient K is 25mm / min 1 / 2 . When the casting speed is set to 1.2m / min, the effective length at the outlet of the crystallizer is 800mm. The heating temperature in the homogeneous temperature zone of continuous directional solidification is set at 1530° C. at the core temperature of the slab in the continuous casting process. During the simulation process, the program control int...

experiment example 2

[0049] In order to verify whether the device can meet the cooling rate of the slab liquid core, a certain cooling rate is set in different temperature ranges when the temperature is high, and the follow-up of the cooling situation is investigated.

[0050] time(s)

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Abstract

A method for physically simulating growth process of condensed organization on continuous casting billet includes three function-control programs of heating function-control program and cooling strength function-control program as well as drawbar tensile rate function-control program. The special device used for realizing said method consists of heating unit, driving unit, motion control unit, cooling unit and temperature measurement-control unit. The said units are controlled and operated by industrial control computer and computer with function curve software.

Description

technical field [0001] The invention relates to a physical simulation method and a device for the solidification structure growth process of continuous casting slabs, and belongs to the field of physical simulation and control of the metal solidification structure growth process and the technical field of metal crystal phase heat treatment processing. Background technique [0002] As a new technology developed in the past 40 years, continuous steel casting has developed rapidly due to its outstanding advantages such as energy saving and high metal yield, and has played a key role in promoting the development and optimization of steel production. The adoption of continuous steel casting technology not only completely changed the old steel casting process, but also led to the structural optimization of the entire steel plant. Therefore, many metallurgical works call it a "technical revolution" in the steel industry. Continuous casting technology is still developing rapidly, an...

Claims

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Application Information

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IPC IPC(8): G06G7/48
Inventor 李仁兴高玉来梁建平杜卫东龚永勇蒋明伟翟启杰
Owner SHANGHAI UNIV
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