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Method for mfg. stainless steel strip

A technology of stainless steel and thin strip, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of open rolling, insufficient to reliably bridge pores, etc.

Inactive Publication Date: 2008-01-02
尤吉纳股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that these rolling conditions are still insufficient to reliably close all porosity, especially during the conversion of the strip or the use of its products, they cannot always prevent the reopening of these closed porosity, resulting in Product rolling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Table 1 gives the composition of the steel grades tested and the test results are given in Table 2. The contents of different elements are expressed in weight percent. Table 1 also gives the thickness of the strips on leaving the casting rolls on which the tests were carried out and the corresponding casting speeds measured between the casting rolls and the hot rolling mill.

[0023] Table 1: Composition of the steel used for the test casting process, the thickness of the cast strip and the casting speed

[0024] Casting Process A

Casting process A'

Casting process B

Casting process C.

C

0.05

0.05

0.04

0.01

mn

1.5

1.5

0.4

0.2

P

＜0.04

＜0.04

＜0.04

＜0.03

S

＜0.01

＜0.01

＜0.01

＜0.01

Si

0.3

0.3

0.3

0.5

Ni

8.6

8.6

＜0.3

＜0.1 ...

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PUM

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Abstract

The present invention relates to manufacture a thin strip of stainless steel comprises direct solidification of liquid steel in a casting installation comprising two cooled moving walls; solidification is finished when the strip leaves the walls; and hot laminating this strip using a rolling mill with cylinders having a diameter of 400-900 mm, the strip temperature after leaving the rolling mill is 800-1100 DEG C, the rate of reduction of the strip thickness during hot lamination is 15-50 %.

Description

technical field [0001] The invention concerns the manufacture of thin stainless steel strip directly from liquid metal by solidification in a crystallizer consisting of two cooling walls moving at the same speed as the solidified strip, for example two rotating with horizontal axes The outer wall of the roller constitutes. Background technique [0002] In this casting method, which is being developed on an industrial scale and is known as "twin roll casting", one of the main problems related to the quality of the strip is the possible presence of pores in the core of the strip. When porosity is found on the product resulting from subsequent smelting treatments of the strip (such as pickling, annealing, cold rolling and other smelting operations), the mechanical properties of the porosity will be limited because of the degradation of mechanical properties. The field of application of the product. [0003] The causes of these pores in the core of twin-roll cast strip are lik...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B22D11/06B21B1/40B21B3/02B21B27/02B22D11/00
CPCB21B3/02B21B1/466B21B1/46B21B1/463B21B1/40
Inventor 弗朗西斯·沙萨涅弗雷德里克·马祖里埃帕斯卡尔·格拉塔科斯
Owner 尤吉纳股份有限公司