Yes they are. You don't read about them because I guess you don't spend any time on the welding equivalent of HN.

Here's a few for welding (and these have already been posted to HN).

http://www.witc.edu/pgmpages/welding/women.htm

http://www.womeninwelding.com/

http://www.nbcnews.com/business/careers/hey-women-want-hot-c...

Generally these are easy to find. You just put "women in " and the industry into any search engine.