High-deep-drawability ultra-pure ferritic stainless steel and manufacturing method thereof

A manufacturing method, stainless steel technology, applied in the field of metal processing, can solve problems such as easy cracking, low deep drawing performance, complex processing technology, etc., to achieve the effect of reducing the processing defect rate and improving deep drawing performance

Pending Publication Date: 2022-02-18
鞍钢联众(广州)不锈钢有限公司
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Problems solved by technology

Due to the improvement of technology, the stamping performance of the stainless steel strip used to manufacture automobile exhaust pipes is now required to be higher and higher, and its processing technology is becoming more and more complicated.
[0003] The stainless steel strip for automobile exhaust pipe using the traditional production process generally has a reduction of 40% to 70% during cold stamping, and the deep drawing performance of the ultra-pure ferritic stainless steel strip on the 2B / 2D surface is relatively low. Low, easy to crack after deep drawing

Method used

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  • High-deep-drawability ultra-pure ferritic stainless steel and manufacturing method thereof
  • High-deep-drawability ultra-pure ferritic stainless steel and manufacturing method thereof
  • High-deep-drawability ultra-pure ferritic stainless steel and manufacturing method thereof

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Embodiment Construction

[0028] A kind of high deep drawability ultra-pure ferritic stainless steel of the present invention, the chemical composition of stainless steel strip is counted as: C≤0.025%, Si≤1.00%, Mn≤1.00%, P≤0.040%, S ≤0.030%, Cr: 17.0%~19.0%, Mo: 0.75%~1.50%, N≤0.025%, 8(C+N)≤Ti+Nb≤0.80%, the balance is Fe and unavoidable impurity elements.

[0029] A kind of manufacturing method of high deep drawability ultra-pure ferritic stainless steel of the present invention, comprises the following steps:

[0030] 1) After smelting, continuous casting and hot rolling, black steel coils are obtained;

[0031] 2) The steel coils with black skins are subjected to solid solution, sand blasting and pickling to obtain No.1 surface steel coils;

[0032] 3) The No.1 surface steel coil is rolled back and forth for multiple passes, and the cold deformation reduction is controlled to be above 73%, to obtain a hard steel coil;

[0033] 4) The hard plate steel coil is subjected to solid solution, electroly...

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Abstract

The invention relates to high-deep-drawability ultra-pure ferritic stainless steel and a manufacturing method thereof. A stainless steel strip comprises the following chemical components in percentage by mass: less than or equal to 0.025% of C, less than or equal to 1.00% of Si, less than or equal to 1.00% of Mn, less than or equal to 0.040% of P, less than or equal to 0.030% of S, 17.0-19.0% of Cr, 0.75-1.50% of Mo, less than or equal to 0.025% of N, greater than or equal to 8 (C + N) and less than or equal to 0.80% of Ti + Nb, and the balance of Fe and inevitable impurity elements. According to the invention, large-deformation-quantity cold deformation is achieved through reciprocating type multi-pass rolling machining, and the manufactured ultra-pure ferrite stainless steel strip has good deep drawing forming performance and can meet the machining requirement for deep drawing of the automobile exhaust pipe.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a high-drawability ultra-pure ferritic stainless steel and a manufacturing method thereof. Background technique [0002] With the rapid development of the automobile industry, the sales of automobiles are increasing year by year, and the consumption of stainless steel for automobile exhaust pipes is also gradually increasing. Due to the improvement of technology, the stamping performance of stainless steel strips used to manufacture automobile exhaust pipes is now required to be higher and higher, and its processing technology is becoming more and more complicated. [0003] The stainless steel strip for automobile exhaust pipe using the traditional production process generally has a reduction of 40% to 70% during cold stamping, and the deep drawing performance of the ultra-pure ferritic stainless steel strip on the 2B / 2D surface is relatively low. Low, easy to crack aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22C38/26C22C38/22C22C38/04C22C38/02C21D8/02C21D1/18
CPCC22C38/22C22C38/26C22C38/28C22C38/04C22C38/02C22C38/001C21D8/0236C21D1/18C21D2211/005
Inventor 谈宇亮徐向东刘文华崔庆君方健方剑锋王晓斌孙器为
Owner 鞍钢联众(广州)不锈钢有限公司
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