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Transverse cold rolling method for improving surface wrinkling of ferritic stainless steel

A stainless steel and ferritic technology, which is applied in the field of cold rolling to improve the surface wrinkles of ferritic stainless steel stamping, and the surface wrinkling phenomenon of ultra-low carbon ferritic stainless steel, can solve the problem of affecting the appearance and performance of products, increase production Cost, surface wrinkle and other issues, to achieve the effect of excellent anti-wrinkle performance, promotion of development, and high surface finish

Active Publication Date: 2014-09-03
UNIV OF SCI & TECH BEIJING
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  • Claims
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Problems solved by technology

In recent years, with the research of scientific researchers and the practice of metallurgists, the content of C and N in ferritic stainless steel has been further reduced, and the addition of some stabilizing elements (Ti, Nb, etc.) has improved the toughness of ferritic stainless steel. , Creep resistance and intergranular corrosion resistance have been greatly improved, but there are still a series of problems in the production process of low-carbon nitrogen ferritic stainless steel, one of which is the surface wrinkles that appear in the process of stamping and deep drawing. Affect the appearance and performance of the product, and the additional process required for grinding wrinkles increases the production cost

Method used

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  • Transverse cold rolling method for improving surface wrinkling of ferritic stainless steel
  • Transverse cold rolling method for improving surface wrinkling of ferritic stainless steel
  • Transverse cold rolling method for improving surface wrinkling of ferritic stainless steel

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Embodiment Construction

[0015] The cold rolling method for improving surface wrinkling of ferritic stainless steel provided by the present invention will be further explained through examples and comparative examples below.

[0016] Complete the steps in the above manufacturing method on the production line 1) smelting and casting into billets; 2) hot-rolling, annealing and pickling the billets;

[0017] The main chemical composition of the ferritic stainless steel hot-rolled annealed plate with a thickness of 2.85mm is 0.01%C, 16.5%Cr and a certain amount of Nb and Ti;

[0018] Cut 4 samples of size 160mm×150mm (the length direction is the original hot rolling direction)×2.85mm on the hot-rolled plate;

[0019] The above four samples were lubricated and rolled on a four-roll reversible cold rolling mill, and recrystallized and annealed in a box-type resistance furnace SRJX-8-13. The cold rolling and annealing processes are shown in Table 1;

[0020]

[0021] Samples No. 1 and No. 3 in Table 1...

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Abstract

The invention relates to a cold rolling method for improving surface wrinkling of ferritic stainless steel. The ferritic stainless steel is medium chrome ferritic stainless steel added with stabilizing elements Nb and Ti and containing about 16% of Cr and less than or equal to 0.02% of C and N. A manufacturing method for a stainless steel plate comprises the steps of 1) smelting and casting for forming a blank; 2) hot rolling annealing for the casting blank, and acid washing; 3) cold rolling and re-crystallization annealing. The method is characterized in that multiple times of rolling is performed in the cold rolling process by adopting the direction (namely the transverse direction of a hot-rolled annealed plate) perpendicular to the hot rolling direction on the rolled surface of the hot-rolled annealed plate as a cold rolling direction. The surface wrinkling morphology of a tensile test piece of the ferritic stainless steel cold-rolled annealed plate manufactured by adopting the method disclosed by the invention is obviously alleviated, and the surface of a deep drawn part of the cold-rolled annealed plate does not have wrinkles.

Description

technical field [0001] The invention relates to a cold rolling method, in particular to a cold rolling method for improving surface wrinkling of ferritic stainless steel stamped and formed, and is mainly suitable for surface wrinkling of ultra-low carbon ferritic stainless steel. Background technique [0002] At present, austenitic stainless steel has been widely used in the industrial field because of its excellent corrosion resistance and good formability, but the high Ni content in austenitic stainless steel makes its production restricted by the shortage of nickel resources in my country and the price of nickel. Serious impact of large fluctuations, therefore, more and more attention has been paid to Ni-saving ferritic stainless steel. In recent years, with the research of scientific researchers and the practice of metallurgists, the content of C and N in ferritic stainless steel has been further reduced, and the addition of some stabilizing elements (Ti, Nb, etc.) has i...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D1/26C21D6/00
Inventor 李静媛苏頔璇方智熊强
Owner UNIV OF SCI & TECH BEIJING
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