公开(公告)号：US20130214669A1

公开(公告)日：2013-08-22

申请号：US13762723

申请日：2013-02-08

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug includes a tubular metal shell extending in an axial direction, wherein the metal shell includes: an externally threaded portion formed on a tip end side of an outer periphery of the metal shell; a seat portion formed on a rear end side of the externally threaded portion in the axial direction and protruding radially outward; and a nickel layer provided on an outer surface of the metal shell, wherein the nickel layer contains phosphorus, and a phosphorus concentration in a portion in which a nickel concentration is 50 at % in a thickness direction of the nickel layer itself is 6 at % or more and 20 at % or less.

Abstract translation: 火花塞包括沿轴向延伸的管状金属壳，其中所述金属壳包括：形成在所述金属壳的外周的末端侧的外螺纹部; 座部，其形成在所述外螺纹部的轴向的后端侧，并且径向向外突出; 以及设置在所述金属壳的外表面上的镍层，其中，所述镍层含有磷，镍层本身的厚度方向的镍浓度为50原子％的部分的磷浓度为6原子％ 以上且20at％以下。

公开(公告)号：US08946976B2

公开(公告)日：2015-02-03

申请号：US14050471

申请日：2013-10-10

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/32 ,  H01T13/39 ,  H01T13/20

CPC classification number: H01T13/20 ,  H01T13/32 ,  H01T13/39

Abstract: A spark plug includes a metal shell, a ground electrode joined to a front end portion of the metal shell and a nickel layer formed on the ground electrode, wherein the ground electrode has a base material exposed region in which a base material of the ground electrode is exposed; and wherein the nickel layer includes an outer-lateral-side nickel layer located on an outer lateral surface of the ground electrode at a position adjacent to the base material exposed region and satisfies a condition of LA≧25 μm, where LA is a length from a first part of the outer-lateral-side nickel layer having a thickness equal to 80% of a maximum thickness of the outer-lateral-side nickel layer to a second part of the outer-lateral-side nickel layer having a thickness equal to 20% of the maximum thickness of the outer-lateral-side nickel layer in a longitudinal direction of the ground electrode.

Abstract translation: 火花塞包括金属壳，与金属壳的前端部接合的接地电极和形成在接地电极上的镍层，其中接地电极具有基材暴露区域，接地电极的基材 被暴露 并且其中所述镍层包括位于所述接地电极的外侧表面上的外侧侧镍层，所述外侧镍层位于与所述基材暴露区域相邻的位置处，并且满足LA≥25μm的条件，其中LA为 外侧镍层的厚度等于外侧镍层的最大厚度的80％的厚度等于外侧镍层的第二部分的厚度的第一部分 外侧镍层在接地电极的长度方向上的最大厚度的20％。

公开(公告)号：US20140117833A1

公开(公告)日：2014-05-01

申请号：US14050471

申请日：2013-10-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/20

CPC classification number: H01T13/20 ,  H01T13/32 ,  H01T13/39

Abstract: A spark plug includes a metal shell, a ground electrode joined to a front end portion of the metal shell and a nickel layer formed on the ground electrode, wherein the ground electrode has a base material exposed region in which a base material of the ground electrode is exposed; and wherein the nickel layer includes an outer-lateral-side nickel layer located on an outer lateral surface of the ground electrode at a position adjacent to the base material exposed region and satisfies a condition of LA≧25 μm, where LA is a length from a first part of the outer-lateral-side nickel layer having a thickness equal to 80% of a maximum thickness of the outer-lateral-side nickel layer to a second part of the outer-lateral-side nickel layer having a thickness equal to 20% of the maximum thickness of the outer-lateral-side nickel layer in a longitudinal direction of the ground electrode.

Abstract translation: 火花塞包括金属壳，与金属壳的前端部接合的接地电极和形成在接地电极上的镍层，其中接地电极具有基材暴露区域，接地电极的基材 被暴露 并且其中所述镍层包括位于所述接地电极的外侧表面上的外侧侧镍层，所述外侧镍层位于与所述基材暴露区域相邻的位置处，并且满足LA≥25μm的条件，其中LA为 外侧镍层的厚度等于外侧镍层的最大厚度的80％的厚度等于外侧镍层的第二部分的厚度的第一部分 外侧镍层在接地电极的长度方向上的最大厚度的20％。

公开(公告)号：US08593046B2

公开(公告)日：2013-11-26

申请号：US13762723

申请日：2013-02-08

Applicant: NGK Spark Plug Co., LTD.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug includes a tubular metal shell extending in an axial direction, wherein the metal shell includes: an externally threaded portion formed on a tip end side of an outer periphery of the metal shell; a seat portion formed on a rear end side of the externally threaded portion in the axial direction and protruding radially outward; and a nickel layer provided on an outer surface of the metal shell, wherein the nickel layer contains phosphorus, and a phosphorus concentration in a portion in which a nickel concentration is 50 at % in a thickness direction of the nickel layer itself is 6 at % or more and 20 at % or less.

Abstract translation: 火花塞包括沿轴向延伸的管状金属壳，其中所述金属壳包括：形成在所述金属壳的外周的末端侧的外螺纹部; 座部，其形成在所述外螺纹部的轴向的后端侧，并且径向向外突出; 以及设置在所述金属壳的外表面上的镍层，其中，所述镍层含有磷，镍层本身的厚度方向的镍浓度为50原子％的部分的磷浓度为6原子％ 以上且20at％以下。