18271349. WELDED JOINT AND AUTOMOBILE MEMBER simplified abstract (NIPPON STEEL CORPORATION)

From WikiPatents
Jump to navigation Jump to search

WELDED JOINT AND AUTOMOBILE MEMBER

Organization Name

NIPPON STEEL CORPORATION

Inventor(s)

Takuya Mitsunobu of Tokyo (JP)

Hiroshi Takebayashi of Tokyo (JP)

Takehiro Takahashi of Tokyo (JP)

WELDED JOINT AND AUTOMOBILE MEMBER - A simplified explanation of the abstract

This abstract first appeared for US patent application 18271349 titled 'WELDED JOINT AND AUTOMOBILE MEMBER

Simplified Explanation

The present disclosure focuses on inhibiting liquid metal embrittlement (LME) cracking and improving corrosion resistance in a welded joint obtained by spot welding two steel sheets.

  • The first steel sheet has a first plating layer facing the second steel sheet, while the second steel sheet has no plating layer or a second plating layer facing the first steel sheet.
  • A boundary plating layer is provided between the two steel sheets near the spot welded part.
  • The tensile strength of both steel sheets is 780 MPa or more, and the area ratio of a MgZn phase in the boundary plating layer is 10% or more.
  • The first and second plating layers must satisfy a predetermined Relation I.
      1. Potential Applications

This technology can be applied in automotive manufacturing, aerospace industry, and any other industry that requires high-strength welded joints with improved corrosion resistance.

      1. Problems Solved

This innovation addresses the issue of liquid metal embrittlement (LME) cracking in welded joints, as well as enhances the corrosion resistance of the joint, leading to improved durability and reliability.

      1. Benefits

The benefits of this technology include increased strength of the welded joint, reduced risk of LME cracking, and enhanced resistance to corrosion, resulting in longer-lasting and more reliable structures.

      1. Potential Commercial Applications

The technology can be commercialized in the automotive industry for manufacturing vehicle components, in the construction sector for structural applications, and in the marine industry for building ships and offshore structures.

      1. Possible Prior Art

One possible prior art could be the use of different plating layers in welded joints to improve corrosion resistance. However, the specific combination of plating layers, boundary plating layer, and tensile strength requirements as outlined in this disclosure may be novel.

        1. Unanswered Questions
        1. How does this technology compare to existing methods for inhibiting LME cracking in welded joints?

This article does not provide a direct comparison with existing methods for inhibiting LME cracking in welded joints. Further research or testing may be needed to evaluate the effectiveness of this technology in comparison to other methods.

        1. What are the specific industries or applications where this technology is expected to have the most significant impact?

While the potential applications are mentioned in the article, a more detailed analysis of the specific industries or applications where this technology is expected to have the most significant impact is not provided. Further market research or case studies may be required to determine the key areas of impact for this innovation.


Original Abstract Submitted

The present disclosure inhibits liquid metal embrittlement (LME) cracking and improves corrosion resistance in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, and a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond toward an outside of the spot welded part. A higher tensile strength of a tensile strength of the first steel sheet and a tensile strength of the second steel sheet is 780 MPa or more, an area ratio of a MgZnphase at the cross-section of the boundary plating layer is 10% or more, and the first plating layer and the second plating layer satisfy a predetermined Relation I.

Retrieved from "http://wikipatents.org/index.php?title=18271349._WELDED_JOINT_AND_AUTOMOBILE_MEMBER_simplified_abstract_(NIPPON_STEEL_CORPORATION)&oldid=44889"