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Ni-plated steel sheet and method for manufacturing ni-plated steel sheet

A manufacturing method and technology for steel plates, which can be applied to manufacturing tools, chemical instruments and methods, furnaces, etc., can solve problems such as difficulty in providing, and achieve the effect of excellent Ni dissolution resistance

Pending Publication Date: 2021-07-30
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, even with the above techniques, it is difficult to provide a Ni-plated steel sheet that has the formability required for steel sheets for batteries and has excellent resistance to Ni leaching.

Method used

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  • Ni-plated steel sheet and method for manufacturing ni-plated steel sheet

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Embodiment Construction

[0035] The inventors of the present invention have studied the effects of various manufacturing conditions in order to improve the Ni elution resistance without impairing the formability of the Ni-plated steel sheet. As a result, it has been found that Ni elution resistance can be dramatically improved without impairing the formability of a Ni-plated steel sheet by making the energization pattern in the Ni electroplating step satisfy the requirements described below.

[0036] FIG. 1-1 is a schematic diagram showing an example of a current conduction pattern in a Ni plating process discovered by the present inventors, where the vertical axis represents current density and the horizontal axis represents time. This energization pattern satisfies the following requirements. In addition, making the current density not constant means that the current density is not set at a constant value during the energization period, as shown in FIG. 1-1 and the like.

[0037] (1) Three or more ...

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Abstract

A Ni-plated steel sheet pertaining to an embodiment of the present invention comprises a base material steel sheet, an Fe-Ni diffusion alloy region disposed on the base material steel sheet, and a Ni plating region disposed on the Fe-Ni diffusion alloy region, the average equivalent circle diameter of crystal grains comprising Ni (fcc) in the Ni plating region, measured in a cross section perpendicular to the rolling surface of the base material steel sheet, being 0.2-4.0 [mu]m.

Description

technical field [0001] The present invention relates to a Ni-plated steel sheet and a method for manufacturing a Ni-plated steel sheet. [0002] This application claims priority based on Japanese Patent Application No. 2018-245984 filed in Japan on December 27, 2018, and the content thereof is incorporated herein. Background technique [0003] Since the Ni-plated steel sheet has high chemical stability, it is preferable as a material of a battery can. However, in consideration of application to xEVs (collectively referred to as EVs, hybrid vehicles, and plug-in hybrid vehicles), Ni-plated steel sheets require high chemical stability over a longer period of time. [0004] In recent years, there have been increasing demands for downsizing, increasing the capacity, and long-term durability of batteries. Therefore, the workability and long-term durability required for steel sheets for batteries are also becoming higher and higher. However, there is an inverse relationship bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/50C25D5/14C25D5/26C21D9/46C22C19/03C22C38/00C22C38/04
CPCC22C19/03C21D9/46C25D5/50C25D5/617B32B15/013C21D1/26C25D5/18C25D3/12Y02E60/10C25D21/12C25D7/0614C25D5/14C22C38/002C22C38/02C22C38/04B32B15/015
Inventor 后藤靖人石塚清和高桥武宽
Owner NIPPON STEEL CORP
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