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A Method for Determining the Dimensions of the Solidified Shape at a Specific Position of a Slab

A technology of specific position and size, applied in the field of metallurgy, can solve the problems of difficulty in realization, inability to obtain cross-sectional solidification shape and specific size data, and high cost, and achieve the effect of accurate measurement values.

Active Publication Date: 2019-11-08
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no method that can really determine the specific size of the solidified shape at a certain position. On the one hand, the most basic verification of the model calculation results is carried out, and on the other hand, it guides the formulation of the slab under heavy compression
If the traditional nailing method is used, it is necessary to shoot nails at multiple places along the width direction of the slab at the same time, the cost is too high, and it is very difficult to realize, and only the shell thickness of the nailing place can be obtained, and the solidified shape of the cross section cannot be obtained. and specific size data

Method used

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  • A Method for Determining the Dimensions of the Solidified Shape at a Specific Position of a Slab
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  • A Method for Determining the Dimensions of the Solidified Shape at a Specific Position of a Slab

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Embodiment Construction

[0038] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] Due to the large width-to-thickness ratio of the slab, coupled with factors such as nozzle arrangement, secondary cooling process, and steel type, the end point of solidification in the later stage of solidification is not synchronized. Viewed along the drawing direction, various solidification structures are formed. Generally, it will be " Type W", such as figure 1 As shown, that is, the center is solidified first, and finally the area about 1 / 4 away from the wide surface is solidified. along figure 1 (a) and (b) in (a) and (b) section, from the cross-sectional view of the slab, the shape of the slab on the width and thickness of the cross-section is as follows figure 2 and image 3 shown, where figure 2 for figure 1 The solidification shape corresponding to the profile at position a in middle, where image 3 for figure 1 The ...

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Abstract

The invention relates to the technical field of metallurgy, in particular to a method for determining the solidified shape and size of a slab at a specific position. The method of the invention includes the steps of gradually reducing the casting billet to count pressure changes; determining the critical reduction state; processing the cross section of the casting billet; The method of the invention measures the shape and size of the unsolidified area, and has the advantages of accurate measurement value, low measurement cost, easy implementation, etc. Process analysis provides the basis.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for measuring the solidification shape of the cross section of a slab at a specific position along the billet drawing direction. Background technique [0002] Due to the characteristics of shape and nozzle arrangement, the slab generally tends to form a "W-shaped" solidification end point in the later stage of solidification, especially for slabs with relatively large widths and steel types with a wide range of two-phase regions. Seen from the cross-section, the solidified shape is similar to the "dog-bone type" at the position where the center has not been completely solidified, that is, the two-phase zone in the central area of ​​the slab is thin, and the two-phase zone is thick in the 1 / 4 area on both sides of the width direction; it has solidified in the central area , the "glass type" appears, that is, the central region has been solidified, and there are two uns...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16
CPCB22D11/16
Inventor 钱亮刘伟涛姜敏陈志凌
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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