Butt welding

About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.

Fabrication of oxide dispersion strengthened ferritic clad fuel pins

Abstract: A resistance butt welding procedure was developed and qualified for joining ferritic fuel pin cladding to end caps. The cladding are INCO MA957 and PNC ODS lots 63DSA and 1DK1, ferritic stainless steels strengthened by oxide dispersion, while the end caps are HT9 a martensitic stainless steel. With adequate parameter control the weld is formed without a residual melt phase and its strength approaches that of the cladding. This welding process required a new design for fuel pin end cap and weld joint. Summaries of the development, characterization, and fabrication processes are given for these fuel pins. 13 refs., 6 figs., 1 tab.

Welding power with control means for the welding joint and the welding position

Abstract: A welding device incorporates some means of selection allowing the operator to select, before the start of welding, at least one primary parameter chosen from the type of weld joint, the welding position and their combinations. An independent claim is also included for a method of electric arc welding using this device.

Use of Welding–Brazing Technology on Microstructural Development of Titanium/Aluminum Dissimilar Joints

Abstract: A novel gas tungsten arc welding–brazing technology was utilized to butt weld titanium Ti-6Al-2Zr-Mo-1.5V to aluminum Al-5Mg-0.6Mn dissimilar alloys using AlSi5 filler metal. Microstructures of the weld zone were analyzed using optical microscopy and scanning electron microscopy. Phase constitution in the reaction zone was characterized by means of X-ray diffraction and energy-dispersive X-ray spectroscopy. The results showed that joint with good appearance can be obtained using the welding–brazing technology. A fusion zone with α-Al and α-Al + Mg2Si + silicon eutectic structure was formed at the aluminum side. Top surface of the titanium was partially melted and a thin titanium/aluminum fusion zone was formed between titanium and weld metal. In other regions, titanium and aluminum were brazed together by the formation of an unequal-thickness reaction layer. Five different intermetallic layers with Ti3.3Al, Ti3.3Al + Ti5Si3, TiAl + Ti5Si3, TiAl2 + Ti5Al11 + Ti9Al23 + Ti5Si3, and TiAl3 are observed orderly...

Optimization of welding thickness on casting-steel surface for production of forging die

Abstract: There are many drawbacks of traditional mold manufacturing technology, especially for dies used on large-scale hydraulic press, such as poor forging penetration, high difficulty of open die-forging process of modules, inferior hardness after heat treatment, high cost, massive waste of invalid forging dies, and so on. Therefore, a new method of mold making is put forward in this paper, which is to do surface welding on casting-steel. The FEM simulation experiments were done to establish a simplified finite element model of the surface welding mold based on JXZG casting-steel. Then, the thermal cycle curve method was used to simulate the surface welding and tempering process. Meanwhile, the temperature field and residual stress field under different welding thickness were analyzed. The finite element modal of landing gear used in a large civil aircraft was established, and then elastic-plastic finite element method was utilized to simulate the forming process of billet and to analyze the temperature field and residual stress distribution of different time. The results demonstrated that FEM could simulate the actual process of surface welding on casting-steel effectively. The equivalent stress close to welding line decreased when the welding thickness inclined, and then it leveled out when the welding thickness was 15 mm; on contrary, the equivalent stress far from welding line increased when the welding thickness declined and the impact of weld pass on casting-steel matrix enlarged which increased the possibility of defects when the casting-steel was used. In sum, when the impact of welding thickness and the cost of mold making are taken into consideration, 16 mm was chosen as the optimal surface welding thickness under given working conditions of landing gear.