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Anti-welding oxide scale steel plate and production method thereof

A technology of iron oxide scale and production method, which is applied in the direction of metal rolling, can solve the problems of stable control of Si content, etc., and achieve the effect of improving the formability of sheet metal and ensuring the chemical composition

Pending Publication Date: 2021-12-10
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent adopts converter + LF refining process for smelting, which involves the problem of Si returning to the molten steel due to the reduction slag produced by LF refining. It is impossible to ensure that the Si content is stably controlled within the range of ≤0.035%. However, in-depth research shows that the resistance to welding oxide scale shedding is not only related to In addition to the C content, the control of the Si content is also very important. This patent specifically limits the Si content

Method used

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  • Anti-welding oxide scale steel plate and production method thereof
  • Anti-welding oxide scale steel plate and production method thereof
  • Anti-welding oxide scale steel plate and production method thereof

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Embodiment 1~6

[0045] Embodiment 1~6 is produced according to above-mentioned implementation mode,

[0046] The chemical composition and weight percentage of the produced steel grades are shown in Table 1. For the slab hot rolling process, see Table 2 for the heating temperature and holding time of the slab in the heating furnace, see Table 2 for the thickness of the intermediate billet, finish rolling temperature, and coiling temperature, and see Table 2 for the cooling mode of the steel plate after it comes off the production line. See Table 3 for the entry tension, exit tension, and rolling force of the skin pass process.

[0047] The process parameters of heating, rough rolling, finish rolling and cooling are shown in Table 2 and Table 3, the process parameters of skin pass process are shown in Table 4, and the mechanical properties of the pickled plate after pickling are shown in Table 5.

[0048] Table 1

[0049]

[0050] Table 2

[0051]

[0052] table 3

[0053]

[0054]...

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Abstract

The invention discloses an anti-welding oxide scale steel plate and a production method thereof. The anti-welding oxide scale steel plate comprises the following chemical components in percentage by weight: 0.02%-0.06% of C, less than or equal to 0.035% of Si, 0.10%-0.30% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.01%-0.050% of Als and the balance of Fe and inevitable impurity elements, the yield strength of the steel plate is 190-250 MPa, the tensile strength is 290-350 MPa, and the ductility is 40%-52%. According to the anti-welding oxide scale steel plate and the production method thereof, the processes of molten iron pretreatment, converter smelting, argon stirring behind the converter, continuous casting, hot continuous rolling, leveling, acid pickling and oil coating are adopted for production, and the smelting process and the light leveling process can guarantee chemical components and improve the forming performance of the plate; and finally, the good matching of the deep drawing forming performance of the compressor and the scaling and falling of the oxide scale in the welding heat affected zone is met.

Description

technical field [0001] The invention belongs to the technical field of steel rolling and plate application in the metallurgical industry, and in particular relates to an anti-welding oxide scale steel plate and a production method thereof. Background technique [0002] As the core component of the refrigerator, the compressor is called the heart of the refrigerator, which determines the quality of the refrigerator. As the pickling plate for compressor casing, low-carbon aluminum-killed steel SPHC or SPHD is mainly used. In addition to requiring good deep-drawing performance, it is also required to weld the heat-affected zone of the upper and lower shells (attached figure 1 As shown, the position 1 is the position where the scale is peeled off in the lap welding heat-affected zone) There is no scale peeling phenomenon, which can avoid the risk of short circuit of the motor caused by the scale fall off, and improve the safety performance of the refrigerator. [0003] Authoriz...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06B21B1/22C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C33/04B21B1/22B21B2001/225
Inventor 曹晓恩孔加维刘晓东杨建宽刘素丽薛仁杰张志扬田文波许用会
Owner HANDAN IRON & STEEL GROUP
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