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Stainless steel foil and preparation method thereof

A technology of stainless steel foil and stainless steel strip, which is applied in the field of solar cells, can solve problems such as hardness reduction, stainless steel foil wrinkles, solar cell productivity, and photoelectric conversion efficiency reduction, and achieve good board passability and the effect of suppressing wrinkles

Inactive Publication Date: 2020-05-08
鸿翌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, in the continuous process after the above-mentioned light-absorbing layer film-forming process, the generation of wrinkles and the like due to buckling of the stainless steel foil (substrate) cannot be avoided, resulting in a decrease in the productivity and photoelectric conversion efficiency of the solar cell.
The stainless steel foil in the prior art has the problem that the hardness will decrease after the film forming process of the light absorbing layer, that is, the hardness will decrease at high temperature, which will cause buckling of the stainless steel foil in the continuous process after the film forming process of the light absorbing layer. Wrinkles, etc.

Method used

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  • Stainless steel foil and preparation method thereof
  • Stainless steel foil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of stainless steel foil provided by the present invention comprises the following components by weight percentage:

[0027] C: 0.20wt%, Si: 2.5wt%, Mn: 1.2wt%, Cr: 10.0wt%, P: ≤0.003wt%, S: ≤0.001wt%, Ni: 0.15wt%, N: 0.08wt%, C+N: 0.28wt%, Al: 0.1wt%, O: ≤0.006wt%, Nb: 0.65wt%, Ti: 0.65wt%, Nb / Ti=1.0, Mo: 2.1wt%, the rest is Fe and not Avoided impurities, the total amount of which is less than 0.01 wt%.

[0028] Use converters, electric furnaces, etc. to melt the steel containing the above composition, and use VOD (Vacuum oxygen decarburization, vacuum oxygen decarburization) and AOD (Argon oxygen decarburization, argon oxygen decarburization) for secondary refining, and then use ingot-opening Stainless steel strip is made by rolling method or continuous casting method.

[0029] The manufacturing process of manufacturing stainless steel foil from a stainless steel strip in this example is substantially the same as the manufacturing process of ordinary stainless...

Embodiment 2

[0039] A kind of stainless steel foil provided by the present invention comprises the following components by weight percentage:

[0040] C: 0.22wt%, Si: 2.8wt%, Mn: 1.4wt%, Cr: 13.0wt%, P: ≤0.003wt%, S: ≤0.001wt%, Ni: 0.25wt%, N: 0.08wt%, C+N: 0.3wt%, Al: 0.2wt%, O: ≤0.006wt%, Nb: 0.85wt%, Ti: 0.75wt%, Nb / Ti=1.13, Mo: 2.3wt%, the rest is Fe and not Avoided impurities, the total amount of which is less than 0.01 wt%.

[0041]The steel containing the above components is smelted using a converter, an electric furnace, etc., and subjected to secondary refining using VOD and AOD, and then made into a stainless steel strip by ingot casting-slab rolling or continuous casting.

[0042] The manufacturing process of manufacturing stainless steel foil from a stainless steel strip in this example is substantially the same as the manufacturing process of ordinary stainless steel foil. That is, a stainless steel strip is foil-rolled, then surface-washed, final annealed, and if necessary,...

Embodiment 3

[0051] A kind of stainless steel foil provided by the present invention comprises the following components by weight percentage:

[0052] C: 0.21wt%, Si: 3.3wt%, Mn: 1.3wt%, Cr: 12.0wt%, P: ≤0.003wt%, S: ≤0.001wt%, Ni: 0.20wt%, N: 0.09wt%, C+N: 0.30wt%, Al: 0.15wt%, O: ≤0.006wt%, Nb: 0.81wt%, Ti: 0.71wt%, Nb / Ti=1.14, Mo: 2.0wt%, the rest is Fe and not Avoided impurities, the total amount of which is less than 0.01 wt%.

[0053] The steel containing the above components is smelted using a converter, an electric furnace, etc., and subjected to secondary refining using VOD and AOD, and then made into a stainless steel strip by ingot casting-slab rolling or continuous casting.

[0054] The manufacturing process of manufacturing stainless steel foil from a stainless steel strip in this example is substantially the same as the manufacturing process of ordinary stainless steel foil. That is, a stainless steel strip is foil-rolled, then surface-washed, final annealed, and if necessa...

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Abstract

The invention discloses stainless steel foil and a preparation method thereof. The stainless steel foil is prepared from following components in percent by weight including 1.2-1.5 wt% of Mn, 8.0-13.0wt% of Cr, 0.15-0.4 wt% of Ni, 0.65-0.95 wt% of Nb, 0.6-0.8 wt% of Ti, 1.9-2.3 wt% of Mo and the balance Fe and inevitable impurities. By optimizing the components and the content of the stainless steel foil and a machining process, the hardness of the prepared stainless steel foil cannot be reduced even when the stainless steel foil is heated to the high temperature of 450 DEG C-600 DEG C in a light absorption layer film forming procedure, the Vicker's hardness of a sample obtained after light absorption layer film forming can reach HV 345-500, and the plate passing performance is good.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a stainless steel foil and a preparation method thereof. Background technique [0002] Thin-film solar cells are divided into two categories: hard substrates and flexible substrates. The so-called flexible substrate solar cell refers to the battery made on flexible materials (such as stainless steel, polyester film). Compared with hard substrate cells such as flat crystalline silicon and glass substrate amorphous silicon, its biggest feature is Lightweight, foldable and unbreakable. Take stainless steel as an example of a company in the United States. The thickness of stainless steel is only 127um, and it has excellent flexibility. Performance will not change either. For amorphous silicon solar cells prepared with polymer polyimide as a flexible substrate, the total thickness of the device is about 100um (including the encapsulation layer), and the power-to-weight ratio ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/44C22C38/48C22C38/50C21D8/02
CPCC21D8/0205C22C38/04C22C38/44C22C38/48C22C38/50
Inventor 王涛代凤玉
Owner 鸿翌科技有限公司
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