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Method for manufacturing austenite stainless steel thin strip for electronic product shell

A technology of austenitic stainless steel and a manufacturing method, applied in the field of stainless steel alloys, can solve problems such as unreachable and unsatisfactory use requirements, and achieve the effect of improving comprehensive performance and good polishing performance

Inactive Publication Date: 2012-03-21
YONGXIN PRECISION MATERIAL WUXI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found through practice that some indicators cannot reach the claimed value, and even if it can reach its value, it still cannot meet the needs of some high-end products with high requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for manufacturing an austenitic stainless steel thin strip for electronic product casings, the austenitic stainless steel contains the following components in weight percentage: C 0.06%, Cr 16.5%, Ni 11.0%, Mn 1.8%, Si 0.3 %, Mo 0.8%, Nb 0.3%, B 0.005%, Al 0.010%, N 0.20%, P ≤ 0.03%, S ≤ 0.005%, 0 ≤ 0.0050%; the balance is Fe and unavoidable impurities; and the stainless steel The range of Ni-bal is 1.5, and the Ni-bal is calculated by the following formula: Ni-bal%=Ni%+30(C%+N%+B%)+0.5Mn%-1.5(Cr%+1.5Si %+Mo%+0.5Nb%)+8.5%; the manufacturing method comprises the following steps:

[0026] (1) Smelting and pouring: use electric furnace + AOD two-step smelting, when the remaining components of the molten steel meet the requirements, adjust the B component in the molten steel by means of Fe-B wire, when the B content in the steel meets 0.005%, Stop feeding the Fe-B wire, feed the Fe-B wire at a temperature of 1480°C, then adjust the temperature of the molten steel ...

Embodiment 2

[0031] A method for manufacturing an austenitic stainless steel thin strip for electronic product casings, the austenitic stainless steel contains the following components in weight percentage: C 0.08%, Cr 14.5%, Ni 13.0%, Mn 1.4%, Si 1.0 %, Mo 0.5%, Nb 0.6%, B 0.001%, Al 0.060%, N 0.05%, P ≤ 0.03%, S ≤ 0.005%, 0 ≤ 0.0050%; the balance is Fe and unavoidable impurities; and the stainless steel The range of Ni-bal% is 0.93, and the Ni-bal% is calculated by the following formula: Ni-bal%=Ni%+30(C%+N%+B%)+0.5Mn%-1.5(Cr%+ 1.5Si%+Mo%+0.5Nb%)+8.5%; the manufacturing method comprises the following steps:

[0032] (1) Smelting and pouring: use electric furnace + AOD + VOD three-step smelting method, when the remaining components of the molten steel meet the requirements, adjust the B component in the molten steel by means of Fe-B wire, when the B content in the steel meets 0.001% , stop feeding the Fe-B wire, feed the Fe-B wire at a temperature of 1550°C, then adjust the temperature o...

Embodiment 3

[0037] A method for manufacturing an austenitic stainless steel thin strip for electronic product casings, the austenitic stainless steel contains the following components in weight percentage: C 0.07%, Cr 15.5%, Ni 12%, Mn 1.6%, Si 0.7% %, Mo 0.6%, Nb 0.5%, B 0.004%, Al 0.04%, N 0.12%, P ≤ 0.03%, S ≤ 0.005%, 0 ≤ 0.0050%; the balance is Fe and unavoidable impurities; and the stainless steel The range of Ni-bal% is 1.0, and described Ni-ba 1% adopts following formula to calculate: Ni-bal%=Ni%+30(C%+N%+B%)+0.5Mn%-1.5(Cr% +1.5Si%+Mo%+0.5Nb%)+8.5%; the manufacturing method comprises the following steps:

[0038] (1) Smelting and pouring: use the three-step method of electric furnace + AOD + VOD to smelt. When the remaining components of the molten steel meet the requirements, adjust the B component in the molten steel by means of Fe-B wire. When the B content in the steel meets 0.004% , stop feeding the Fe-B wire, feed the Fe-B wire at a temperature of 1520°C, then adjust the tem...

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Abstract

The invention discloses a method for manufacturing an austenite stainless steel thin strip for an electronic product shell. Due to an alloy design of austenite stainless steel, elements generate a synergistic effect; on the basis of a large number of experiments, process parameters of smelting, hot rolling and cold rolling are optimized; proper temperature and a proper reduction rate of a smelting and B adding process, the hot rolling, the cold rolling and annealing are controlled; the optimization of the parameters in the manufacturing method is favorable for guaranteeing that the stainless steel thin strip reaches an estimated performance index, namely the hardness is greater than 280 Hv; the level of impurities is lower, namely (A+B+C+D ) is less than or equal to 2.0; needle holes and concave troughs are prevented after polishing, so the smoothness of a mirror surface is realized, and the magnetic inductivity is less than 0.6 Gs / Oe; therefore, the manufacturing method meets a requirement of an electronic element, particularly the higher and higher requirement in the field of communication devices, such as a mobile phone shell and the like.

Description

technical field [0001] The invention relates to the field of stainless steel alloys, in particular to a method for manufacturing an austenitic stainless steel thin strip used for housings of electronic products. Background technique [0002] Along with the raising of people's living standard, electronic devices such as mobile phone, PDA (personal digital assistant, personal digital assistant), MP3 and palmtop computer enter people's life and work in a large number, bring convenience and fun to people. At present, people not only require powerful functions for the above-mentioned various electronic devices, but also hope that they have a beautiful appearance and a good surface texture. Therefore, the processing precision and roughness of the shell surface of the electronic device are highly required. [0003] At present, 304 austenitic stainless steel is commonly used in the manufacture of housings of electronic devices, especially cold-rolled sheets, because cold-rolled shee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/54C22C33/04C21D8/02
Inventor 濮晓芳
Owner YONGXIN PRECISION MATERIAL WUXI
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