US 11,666,980 B2
Work hardened welds and methods for same
Yong Joo Kim, Tulsa, OK (US); Stephen Douglas Obermark, Tulsa, OK (US); Brent Michael Summers, Tulsa, OK (US); Austin Tyler Hanes, Mounds, OK (US); and William Francis Obermark, Sand Springs, OK (US)
Assigned to Webco Industries, Inc., Sand Springs, OK (US)
Filed by Webco Industries, Inc., Sand Springs, OK (US)
Filed on May 24, 2021, as Appl. No. 17/327,812.
Application 17/327,812 is a continuation of application No. 16/485,618, granted, now 11,014,181, previously published as PCT/US2018/017971, filed on Feb. 13, 2018.
Claims priority of provisional application 62/485,645, filed on Apr. 14, 2017.
Claims priority of provisional application 62/458,507, filed on Feb. 13, 2017.
Prior Publication US 2021/0293359 A1, Sep. 23, 2021
Int. Cl. B23K 9/028 (2006.01); B23K 9/23 (2006.01); C21D 7/10 (2006.01); C21D 9/08 (2006.01); C21D 9/50 (2006.01); C22F 1/10 (2006.01); F16L 13/02 (2006.01); B23K 103/18 (2006.01); B23K 103/04 (2006.01); B23K 101/06 (2006.01); B23K 101/10 (2006.01)
CPC B23K 9/0282 (2013.01) [B23K 9/23 (2013.01); C21D 7/10 (2013.01); C21D 9/08 (2013.01); C21D 9/50 (2013.01); C22F 1/10 (2013.01); F16L 13/02 (2013.01); B23K 2101/06 (2018.08); B23K 2101/10 (2018.08); B23K 2103/04 (2018.08); B23K 2103/26 (2018.08); C21D 2221/00 (2013.01)] 40 Claims
OG exemplary drawing
 
1. A service tube assembly comprising:
one or more service tubes, the one or more service tubes each include at least a first tube and a second tube, each of the first and second tubes having:
a base material having a specified mechanical characteristic; and
a weld interface proximate an end of each respective tube;
at least one of the one or more service tubes includes one or more work hardened weld assemblies joining the first and second tubes at the respective ends; and
wherein the work hardened weld assembly includes:
a weld fusion zone between the weld interfaces of the first and second tubes;
the weld interfaces of the first and second tubes; and
wherein the tube assembly includes welded and work hardened configurations:
in the welded configuration the weld interfaces are stacked between the weld fusion zone and the base material of the respective first or second tubes; and
in the work hardened configuration the weld fusion zone and the weld interfaces are deformed into the base material, the weld interfaces are deformed between the stacked weld fusion zone and the base material of the first and second tubes, and the weld fusion zone is work hardened and the weld interfaces of the first and second tubes are work hardened between the work hardened weld fusion zone and the base material of the first and second tubes according to the deformation.