SPARK PLUG

A spark plug including a center electrode with a tip welded to a front end portion with a fused portion therebetween. The front end portion contains Ni, Cr, and at least one element selected from a group B consisting of Mn, Si, Al, Ti, rare earth elements, Hf, and Zr. Ni is present in the largest pr...

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Bibliographic Details
Main Authors SUMOYAMA, Daisuke, ITO, Kazuki
Format Patent
LanguageEnglish
Published 19.09.2019
Subjects
BASIC ELECTRIC ELEMENTS
CORONA DEVICES
ELECTRICITY
GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
OVERVOLTAGE ARRESTERS USING SPARK GAPS
SPARK GAPS
SPARKING PLUGS
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Summary:A spark plug including a center electrode with a tip welded to a front end portion with a fused portion therebetween. The front end portion contains Ni, Cr, and at least one element selected from a group B consisting of Mn, Si, Al, Ti, rare earth elements, Hf, and Zr. Ni is present in the largest proportion, and Cr is present in the second largest proportion and in an amount of 12% by mass or more. The at least one element selected from the group B is present in a total amount of 0.1% by mass or more. The front end portion satisfies f/e≤0.15 and m/e≤0.015, where f is the Fe content, e is the sum of the Cr, Si, and Al contents, and m is the Mo content.
Bibliography:Application Number: US201916285463