Abstract In-service welding repair is important to ensure natural gas pipelines’ safe and reliable operation. The temperature distribution in the heat treatment process directly affects pipeline’s bearing capacity local stress distribution. This study studied of a high steel pipeline generated by for long-term transportation oil was experimentally. medium frequency induction heating method appl...

OBJECTIVE To test the feasibility of laser tissue welding (LTW) in creating an endoscopic transluminal repair of esophageal perforation. STUDY DESIGN Animal model. SUBJECTS AND METHODS A diode laser was used to create an endoluminal rabbit esophageal perforation repair. Burst pressures were compared with open incision, external suture, and external laser-augmented suture closure. Comparison...

This study investigated the effects of the hot isostatic pressing process on the crack healing, microstructure, and mechanical properties of the laser repair-welded CM247LC precipitation-hardened superalloy. To ensure the strength of the repair-welded area, this study used the direct re-melting approach, and simulated the repair welding with the filler addition, which has a chemical composition...

Q690E high strength low alloy (HSLA) steel plays an important role in offshore structures. In addition, underwater local cavity welding (ULCW) technique was widely used to repair important offshore constructions. However, the high cooling rate of ULCW joints results in bad welding quality compared with underwater dry welding (UDW) joints. Q690E high strength low alloy steels were welded by mult...

Abstract Based on the analysis of operation methods rail welding and postweld heat treatment in track change overhaul existing railway lines at home abroad, this paper puts forward problems off-line on-line China, solutions to problems. When mode is used for welding, it can reduce quality risk process low-temperature locking joint; case broken urgent repair track, method eliminate secondary shu...