摘要:
L'invention porte sur un procédé de fabrication d'un fil fourré à partir d'une bande métallique et d'éléments de remplissage, dans lequel on réalise successivement un formage en « U »; un dépôt de flux formé desdits éléments de remplissage, un formage en « O » et un soudage de la bande métallique mise pour obtenir un fil soudé contenant le flux de remplissage et ayant un diamètre initial d'au moins 10 mm. Ensuite, on tréfile et/ou on lamine le fil de diamètre initial d'au moins 10 mm jusqu'à obtenir un fil fourré de diamètre final inférieur à 5 mm. Afin de faciliter la répartition interne du flux lors de son tréfilage ou laminage, ou les deux, on incorpore au flux de remplissage, une proportion inférieure à 5% en masse (% en masse de flux) d'une ou plusieurs matières favorisant le glissage du flux de remplissage dans le fil, en particulier du graphite ou du bisulfure de molybdène. Les fils fourrés ainsi fabriqués sont utilisables en soudage à l'arc de type MIG/MAG ou à l'arc submergé.
摘要:
This invention relates to a method for producing a weldable titanium alloy and/or composite wire by cold compaction, extrusion and rolling of a blended mixture of titanium sponge and alloying additions and/or reinforcing particles, where the method comprises the following successive process steps: a) forming a green object by; - blending particulates of titanium sponge with a particle diameter in the range from 0.5 to 10 mm with one or more powdered alloying additions with particle size in the range from 50– 250 μm, -cold compacting the blended mixture and subjecting the blended mixture including lubricant to a pressure in the range from 750 to 1250 MPa, b) forming a work body of alloyed titanium by; - heating the green object in a protected atmosphere up to a temperature in the range from 1000 to 1250 °C and holding the temperature for a period of at least 4 hours, and then - hot working the green object at a temperature of less than 200 °C apart from the beta transition temperature of the titanium alloy and shaping the green object to obtain an elongated profile, and c) forming the welding wire by: - rolling the elongated profile body placing the work body in a rolling mill with one or more rolls placed in series to form the weldable wire with the desired diameter.
摘要:
A composition for welding or brazing aluminum comprises silicon (Si) and magnesium (Mg) along with aluminum in an alloy suitable for use in welding and brazing. The Si content may vary between approximately 4.7 and 10.9 wt %, and the Mg content may vary between approximately 0.15 wt % and 0.50 wt %. The alloy is well suited for operations in which little or no dilution from the base metal affects the Si and/or Mg content of the filler metal. The Si content promotes fluidity and avoids stress concentrations and cracking. The Mg content provides enhanced strength. Resulting joints may have a strength at least equal to that of the base metal with little or no dilution (e.g., draw of Mg). The joints may be both heat treated and artificially aged or naturally aged.