Talk:Shielded metal arc welding

From Wikipedia, the free encyclopedia

Shielded metal arc welding is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. If you can update or improve it, please do.

Shielded metal arc welding appeared on Wikipedia's Main Page as Today's featured article on February 16, 2006.

Shielded metal arc welding has had a peer review by Wikipedia editors which is now archived. It may contain ideas you can use to improve this article.

This article is part of WikiProject Metalworking, an attempt to cleanup, categorize and expand Wikipedia articles related to metalworking. If you would like to participate, you can edit the article attached to this page or visit the project page, where a list of open tasks is maintained.

This article has been selected for Version 0.5 and the next release version of Wikipedia. This Engtech article has been rated FA-Class on the assessment scale.

The following users are active in maintaining and improving this article. If you have questions regarding verification and sources, they may be able to help: Spangineer (talk • contribs • email)

It says "these face shields sense when the super-bright electric arc has begun and turn the liquid crystal glass dark a few nanoseconds later." But switching speeds of liquid crystals are usually more in the millisecond time scale. Of course for the welding application it doesn't have to be a problem, since the light from the arc will presumably not turn on in a nanosecond, but more gradually.

Fixed. --Spangineer^es (háblame) 03:23, 14 January 2006 (UTC)

Wasn't this already on the main page a while back? A Clown in the Dark 03:06, 16 February 2006 (UTC)

Nope, but Welding and Gas metal arc welding were last year. This one just got featured last month. --Spangineer (háblame) 03:08, 16 February 2006 (UTC)

When I was learning about welding in the 1980's we learned about synergic power supplies, where pulsed current carries particles from the electrode onto the work in a very controlled fashion. Unless I remember wrongly, welding power supplies can be much more sophisticated than the article describes. Dunstan 13:49, 16 February 2006 (UTC)

They can be, but I think that's a topic for welding power supply. I haven't done much study of all of the various types of power supplies and thus haven't written an in depth article on that topic. This article attempts to cover the basics of power supplies commonly used for SMAW, but I'll see if I can find anything in my sources about what you describe. --Spangineer (háblame) 16:18, 16 February 2006 (UTC)

[edit] Electrode sources

The last paragraph of the Electrode section was changed from:

Common electrodes include the E6010, a fast-freeze, all-position electrode with a minimum tensile strength of 60 ksi (410 MPa) which is operated using DCEP. Its cousin E6011 is similar except that it is used with alternating current. E7024 is a fast-fill electrode, used primarily to make flat or horizontal welds using AC, DCEN, or DCEP. Examples of a fill-freeze electrodes are the E6012, E6013, and E7014, all of which provide a compromise between fast welding speeds and all-position welding.<ref>Lincoln Electric, 6.2-7–6.2-10</ref>

to

Common electrodes include the E6010, a fast-freeze, all-position electrode with a minimum tensile strength of 60 ksi (410 MPa) which is operated using DCEP. E6010 is primarily used for making the root pass when welding pipe. Its cousin E6011 is similar except that it is used with alternating current. E6011 is known for its strong penetration and tolerance of dirty and/or rusty metal. E7018 is a low-hydrogen electrode used for high quality X-ray welds. It can be used in all positions with either AC or DC current. E7018 is also used when weld bead apeparance is a priority. E7024 is a fast-fill electrode, used primarily to make flat or horizontal welds using AC, DCEN, or DCEP. Examples of a fill-freeze electrodes are the E6012, E6013, and E7014, all of which provide a compromise between fast welding speeds and all-position welding.<ref>Lincoln Electric, 6.2-7–6.2-10</ref> E8018 and E9018 are higher strength electrodes commonly used on medium to high alloy steels, such as boilers.

All the added statements need to be confirmed in published works before being included here (as per WP:V). I'll look into the material I have, but any help would be appreciated! --Spangineer^es (háblame) 18:20, 23 October 2006 (UTC)

I'll take a look in my books but the information is correct. To not even mention 7018 is odd especially when lesser known/used electrodes are mentioned. 6011 and 7018 are among the most commonly used electrodues. Pipe welds are typically done with a 6010 root pass and 7018 cap. Boiler tube welds are now commonly tig'ed for the root past and finished with the appropriate stick electrode (7018, 8018, or 9018). An picture of an electrode chart from Lincoln, or Miller/Hobart would not be a bad idea. (ROBZZZ 15:20, 24 October 2006 (UTC))

I fixed a slight grammar problem, changing "Examples of a fill-freeze electrodes" to "Examples of fill-freeze electrodes." Hildenja 05:53, 24 November 2006 (UTC)