CORROSION-RESISTANT SCREW, USE OF A SCREW OF THIS TYPE IN A CORROSIVE ENVIRONMENT, AND METHOD FOR THE FABRICATION OF A SCREW OF THIS TYPE

摘要

The invention relates to a screw, having a shank which is provided with a thread, produced from a material which is suitable for a strength-increasing thermal treatment and is resistant to corrosion, and to the use of a screw of this type in a corrosive environment in conjunction with a corrosion-resistant component to be screwed, and, furthermore, to a method for producing a screw of this type. Screws of this type are used, in particular, for direct screwing.

主权项

1. A screw comprising:
a shank including a thread and formed of a material that is suitable for a strength-increasing thermal treatment and resistant to corrosion, wherein the screw has a first strength predetermined by thermal treatment carried out prior to creation of the thread by reshaping, wherein the shank is reshaped in order to produce the thread including turns, flanks, and a thread root, and the thread turns include, on account of strain hardening caused by reshaping, an increased strength compared to a strength of a non-reshaped region, and wherein the screw further includes a second strength, the thread being at least one of thread-forming and self-tapping.