Austenitic stainless steel for electronic products and preparation method of austenitic stainless steel

A technology for austenitic stainless steel and electronic products, which is applied in the field of austenitic stainless steel for electronic products and its preparation, and can solve the problems of poor magnetic permeability index of austenitic stainless steel, high chromium-nickel equivalent of stainless steel, poor corrosion resistance, etc. , to achieve the effect of improving the purity of molten steel, uniform composition of molten steel, and eliminating secondary defects

Inactive Publication Date: 2020-02-21
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an austenitic stainless steel for electronic products to solve the problems of high chromium-nickel equivalent and poor corrosion resistance of existing austenitic stainless steel
[0006] Another object of the present invention is to provide a method for preparing austenitic stainless steel for electronic products, so as to solve the problem of poor magnetic permeability index of existing austenitic stainless steel

Method used

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  • Austenitic stainless steel for electronic products and preparation method of austenitic stainless steel
  • Austenitic stainless steel for electronic products and preparation method of austenitic stainless steel
  • Austenitic stainless steel for electronic products and preparation method of austenitic stainless steel

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Embodiment 1

[0034] Embodiment 1. An austenitic stainless steel for electronic products, comprising the following elements by weight: C: 0.023%, Mn: 1.400%, Si: 0.500%, P: 0.019%, S: 0.001%, Cr: 17.250% , Ni: 13.600%, Mo: 2.600%, Cu: 0.035%, N: 0.085%, O: 0.0026%, the balance is Fe and other uncontrollable elements brought from raw materials. Its metallographic structure is as follows figure 1 As shown in the figure, it can be seen from the structure that the solid solution state structure is a single-phase austenite structure.

[0035] The preparation method is as follows:

[0036] A. Smelting and casting: two-step smelting by electric furnace + AOD furnace, when the molten steel composition reaches the design target value, use 350 meters of Si-Ca-Ba wire for calcium treatment before weak blowing in the LF furnace, and adjust the temperature of the tundish to 1500 ℃ , for continuous casting, and electromagnetic stirring is used in the continuous casting process;

[0037] B. Hot rolling...

Embodiment 2

[0043]Embodiment 2. An austenitic stainless steel for electronic products, comprising the following elements by weight: C: 0.025%, Mn: 1.450%, Si: 0.500%, P: 0.020%, S: 0.001%, Cr: 17.000% , Ni: 12.500%, Mo: 2.550%, Cu: 0.030%, N: 0.095%, O: 0.0031%, the balance is Fe and other uncontrollable elements brought from raw materials.

[0044] The preparation method is as follows:

[0045] A. Smelting and casting: two-step smelting by electric furnace + AOD furnace, when the molten steel composition reaches the design target value, use 200 meters of Si-Ca-Ba wire for calcium treatment before weak blowing in the LF furnace, and adjust the temperature of the tundish to 1480 ℃ , for continuous casting, and electromagnetic stirring is used in the continuous casting process;

[0046] B. Hot rolling: 9 passes of rough rolling and 7 passes of finishing rolling are carried out, the temperature of unloading is controlled at 1265 °C, the rolling temperature of finishing rolling is 1050 °C, a...

Embodiment 3

[0051] Embodiment 3. An austenitic stainless steel for electronic products, comprising the following elements by weight: C: 0.024%, Mn: 1.197%, Si: 0.491%, P: 0.019%, S: 0.001%, Cr: 17.430% , Ni: 13.600%, Mo: 2.584%, Cu: 0.300%, N: 0.057%, O: 0.0033%, and the balance is Fe and other uncontrollable elements brought from raw materials.

[0052] The preparation method is as follows:

[0053] A. Smelting and casting: Two-step smelting by electric furnace + AOD furnace, when the molten steel composition reaches the design target value, use 150 meters of Si-Ca-Ba wire for calcium treatment before weak blowing in the LF furnace, and adjust the temperature of the tundish to 1490 ℃ , for continuous casting, and electromagnetic stirring is used in the continuous casting process;

[0054] B. Hot rolling: 9 passes of rough rolling and 7 passes of finishing rolling are carried out, the temperature of the furnace is controlled at 1275 °C, the rolling temperature of finishing rolling is 107...

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Abstract

The invention discloses austenitic stainless steel for electronic products and a preparation method of the austenitic stainless steel, and belongs to the field of stainless steel smelting. The problems that existing austenitic stainless steel is high in chromated nickel equivalent and poor in corrosion resistance are solved. The stainless steel comprises smaller than 0.03% of C, 0.5%-1.5% of Mn, smaller than 0.75% of Si, smaller than 0.04% of P, smaller than 0.01% of S, 15.0%-19.0% of Cr, 9.0%-15.0% of Ni, 2.0%-3.0% of Mo, smaller than 0.5% of Cu, smaller than 0.1% of N, smaller than 0.01% ofO and the balance Fe and other uncontrollable elements. The preparation method comprises the steps of smelting and casting, wherein a Si-Ca-Ba line is utilized for calcium treatment; hot rolling; hotline solution treatment and acid pickling; cold rolling; and degreasing. The stainless steel prepared through the method is low in chromated nickel equivalent, good in corrosion resistance, low in magnetic conductivity and high in hardness.

Description

technical field [0001] The invention belongs to the field of stainless steel smelting, and in particular relates to an austenitic stainless steel for electronic products and a preparation method thereof. Background technique [0002] Electronic products such as mobile phones and Pads have been closely related to people's lives, and the users of the above products have not only pursued performance and configuration, but also hoped for beautiful appearance and good surface texture. Therefore, stainless steel materials for electronic products have presented new challenges. High surface machining accuracy and excellent polishing performance are required. In addition, electronic products such as mobile phones are closely related to the transmission and reception of communication signals, and have special requirements for the magnetic permeability of stainless steel materials. In addition, because austenitic stainless steel contains nickel, and electronic devices such as mobile p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0263C21D2211/001C22C33/04C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 赵得江喻大刚潘吉祥
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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