Antibacterial heat treatment process for antibacterial ferrite stainless steel cold-rolled sheet

A technology of stainless steel and antibacterial iron, which is applied in the field of ferritic stainless steel materials, can solve problems such as product processing performance, and achieve the effect of eliminating the leveling process, avoiding wrinkling, and obvious antibacterial effect

Pending Publication Date: 2021-07-23
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the above patents uses an inert gas bell furnace to perform antibacterial heat treatment o

Method used

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  • Antibacterial heat treatment process for antibacterial ferrite stainless steel cold-rolled sheet

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[0026] Example 1:

[0027] a. Bell-type furnace antibacterial heat treatment: the hot-rolled black coil is annealed in a bell-type furnace, the annealing temperature is 830-850°C, and the holding time is 18 hours.

[0028] b. Thermal annealing and pickling: the elongation rate of the scale breaker is 1.5%, the throwing speed of the shot blasting machine is 72m / s, and the shot flow rate is 12kg / m 2 ; The concentration of sulfuric acid in the sulfuric acid pre-pickling section is 270g / l, and the mixed acid pickling stage uses HF and HNO 3 Perform mixed acid pickling, the concentration of HF is 4g / l, HNO 3 The concentration is 33g / l.

[0029] c. Cold rolling: rolling the hot-annealed pickled coil in step b, using 11 rolling passes, with a total reduction ratio of 83%.

[0030] d. Cold annealing and pickling: Carry out continuous annealing to the hard rolled coil in step c, and control the material temperature at 830-845°C; pickle the coil after continuous annealing by using ne...

Example Embodiment

[0034] Example 2:

[0035] a. Bell-type furnace antibacterial heat treatment: the hot-rolled black coil is annealed in a bell-type furnace, the annealing temperature is 830-850°C, and the holding time is 18 hours.

[0036] b. Thermal annealing and pickling: the elongation rate of the scale breaker is 1.5%, the throwing speed of the shot blasting machine is 72m / s, and the shot flow rate is 12kg / m 2 ; The concentration of sulfuric acid in the sulfuric acid pre-pickling section is 272g / l, and the mixed acid pickling stage uses HF and HNO 3 Perform mixed acid pickling, the concentration of HF is 4g / l, HNO 3 The concentration is 32g / l.

[0037] c. Cold rolling: rolling the hot-annealed pickled coil in step b, using 11 rolling passes, with a total reduction ratio of 83%.

[0038]d. Cold annealing and pickling: Carry out continuous annealing to the hard rolled coil in step c, and control the material temperature at 830-845°C; pickle the coil after continuous annealing by using neu...

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Abstract

The invention discloses an antibacterial heat treatment process for an antibacterial ferrite stainless steel cold-rolled sheet. The antibacterial heat treatment process for the antibacterial ferrite stainless steel cold-rolled sheet comprises the following components in part by weight: 16.0-17.0% of Cr, 1.3-2.0% of Cu, 0.02-0.045% of C, 0.20-0.50% of Si, 0.25-0.50% of Mn, less than or equal to 0.035% of P, less than or equal to 0.003% of S, less than or equal to 0.50% of Ni and the balance of Fe and inevitable impurities. The antibacterial heat treatment process comprises the following steps of bell-type furnace antibacterial heat treatment, thermal annealing and pickling, cold rolling, cold annealing and pickling, rewinding treatment, antibacterial heat treatment, shearing and packaging. The processing performance, the surface quality and the antibacterial performance of the rolled sheet subjected to antibacterial heat treatment meet the standard requirements, and particularly, the antibacterial effect on staphylococcus aureus is obviously improved. Through optimization of the process, the problem that the antibacterial performance of a cold-rolled sheet does not reach the standard is solved, the leveling link can be omitted, direct use for stamping to avoid wrinkling is achieved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of ferritic stainless steel materials, and relates to an antibacterial heat treatment process for an antibacterial ferritic stainless steel cold-rolled plate. Background technique [0002] Antibacterial ferritic stainless steel is based on the conventional 430 ferritic stainless steel, by adding copper element, so that it can play an antibacterial effect due to the dissolution of copper ions during use, because it will not lose the antibacterial effect due to surface wear, it can Widely used in home life. As the raw material of antibacterial stainless steel cold-rolled sheet, it is necessary to ensure the processing performance and surface quality of the product, and the most important thing is to have good antibacterial performance. Hot-rolled black coils have a high antibacterial rate after antibacterial heat treatment in a bell furnace, but the products are mostly cold-rolled sheets, and the antibacteria...

Claims

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Application Information

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IPC IPC(8): C22C38/20C22C38/02C22C38/04C22C38/42C21D8/02C21D1/773C21D1/26
CPCC22C38/20C22C38/02C22C38/04C22C38/42C21D8/0247C21D8/0236C21D8/0242C21D1/773C21D1/26
Inventor 程云霞秦俊山王军伟潘吉祥
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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