Spark plug electrode and method for manufacturing this spark plug electrode and spark plug including a spark plug electrode

A spark plug, comprising:

• a spark plug electrode, including:
• an electrode base body made up of a first material;
• and
• an ignition element made up of a second material, forming an ignition surface for a spark plug, and being integrally joined to the electrode base body via a welding seam;
• wherein the ignition element has a longitudinal axis which extends perpendicularly to a joining surface between the ignition element and the electrode base body, or to the welding seam,
• wherein the ignition element is in the form of a pin,
• wherein the spark plug electrode has a surface formed by a surface of the ignition element and a surface of electrode base body, wherein the area of the surface of the ignition electrode around the joining surface between the electrode base body and the ignition element is a joining point,
• wherein a weld pool and the welding seam arise, during the welding, at the joining surface and the joining point,
• wherein the weld pool for the welding seam on the spark plug electrode extends at least up to the longitudinal axis of the ignition element, so that, after a rotation of the ignition electrode about the longitudinal axis during the welding, the joining surface between the electrode base body and the ignition element is completely fused, so that the welding seam extends across an entire diameter of the ignition element, and
• wherein a mixing rate for the first material or for the second material is less than 15 weight percent in a half of the welding seam that is adjacent to the ignition element.

A method for manufacturing a spark plug electrode, the method comprising:

• providing an electrode base body made up of a first material and an ignition element made up of a second material;
• and
• welding to each other the electrode base body and the ignition element, thereby forming a welding seam, wherein the welding includes tilting a reflection element to direct a welding beam over a surface of the spark plug electrode thereby producing a welding seam joining the electrode base body and the ignition element;
• wherein the ignition element has a longitudinal axis which extends perpendicularly to a joining surface between the ignition element and the electrode base body, or to the welding seam,
• wherein the ignition element is in the form of a pin,
• wherein the spark plug electrode has a surface formed by a surface of the ignition element and a surface of electrode base body, wherein the area of the surface of the ignition electrode around the joining surface between the electrode base body and the ignition element is a joining point,
• wherein a weld pool and the welding seam arise, during the welding, at the joining surface and the joining point, and
• wherein the weld pool for the welding seam on the spark plug electrode extends at least up to the longitudinal axis of the ignition element, so that, after a rotation of the ignition electrode about the longitudinal axis during the welding, the joining surface between the electrode base body and the ignition element is completely fused, so that the welding seam extends across an entire diameter of the ignition element.