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Method for producing ultra-pure ferritic stainless steel through continuous rolling and annealing

A technology of ultra-pure iron and stainless steel, which is applied in the field of metal processing, can solve the problems that the product requirements cannot be met, and the mechanical properties and plastic strain ratio of ultra-pure ferrite cannot meet the requirements of customers, so as to improve the mechanical properties and increase the R value Effect

Pending Publication Date: 2021-08-03
鞍钢联众(广州)不锈钢有限公司
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Problems solved by technology

[0002] The traditional process adopts 20-high rolling mill reciprocating rolling, so that the overall down-rolling rate of stainless steel reaches 70-80%, and the mechanical properties and plastic strain ratio of the product can meet the requirements of the product, while the maximum down-rolling rate of a single rolling of the three-tandem rolling mill is only 60%. %, unable to meet product requirements, so that the mechanical properties and plastic strain ratio of ultra-pure ferrite produced by continuous rolling mills cannot meet customer requirements

Method used

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  • Method for producing ultra-pure ferritic stainless steel through continuous rolling and annealing

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Embodiment Construction

[0019] The solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. The following description is only for explaining the present invention, and does not limit its content.

[0020] A method for continuous rolling and annealing to produce ultra-pure ferritic stainless steel, the specific method comprising:

[0021] The hot-rolled black skin is firstly rolled two times, annealed and pickled to obtain a 2E surface product, and then three times rolled, annealed and pickled to obtain an ultra-pure ferritic stainless steel strip product with a 2B / 2D surface ;

[0022] After each rolling, rapidly heat from room temperature to 900-1100°C, and immediately water-cool to room temperature (ie solution treatment); the time for rapid heating from room temperature to 900-1100°C t≤10min.

[0023] The total reduction of the two rolling passes is ≥ 20%.

[0024] The total rolling reduction of the three rolling passes is more th...

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Abstract

The invention discloses a method for producing ultra-pure ferritic stainless steel through continuous rolling and annealing. The method specifically comprises the steps that a hot rolling black skin feeding material is firstly subjected to two-pass rolling and annealing and acid pickling to obtain a 2E-surface product, and then subjected to three-pass rolling and annealing and acid pickling to obtain an ultra-pure ferritic stainless steel strip product with a 2B / 2D surface; after rolling each time, the temperature is rapidly raised to 900-1100 DEG C from room temperature, and immediate water cooling is carried out to achieve room temperature (namely solution treatment); and the time t for rapidly heating to 900-1100 DEG C from room temperature is less than or equal to 10 minutes. The mechanical property of a steel strip is improved and the plastic strain ratio R value is increased in a two-rolling and two-annealing manner, so that a continuous mill product can meet the use requirements of customers, and the plastic strain ratio R value of the product is greater than or equal to 1.5.

Description

technical field [0001] The invention belongs to the technical field of metal processing; in particular, it relates to a method for producing 2B / 2D surface ultra-pure ferritic stainless steel strips by continuous rolling and annealing. Background technique [0002] The traditional process adopts 20-high rolling mill reciprocating rolling, so that the overall down-rolling rate of stainless steel reaches 70-80%, and the mechanical properties and plastic strain ratio of the product can meet the requirements of the product, while the maximum down-rolling rate of a single rolling of the three-tandem rolling mill is only 60%. %, unable to meet product requirements, so that the mechanical properties and plastic strain ratio of ultra-pure ferrite produced by continuous rolling mills cannot meet customer requirements. Contents of the invention [0003] The invention provides a method for continuous rolling and annealing to produce ultra-pure ferritic stainless steel. The invention i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C21D1/18C22C38/22
CPCC21D8/0236C21D8/0268C21D1/18C21D2211/005C22C38/22
Inventor 周耿赵海波徐向东谢宏儿张玉宝
Owner 鞍钢联众(广州)不锈钢有限公司
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