Anti-welding oxide scale steel plate and production method thereof

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...

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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

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