Abstract:
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.
Abstract:
This invention relates to a method and arrangement for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by supplying the metallic feed material in the form of a wire and employing two gas transferred arcs, one plasma transferred arc for heating the deposition area on the base material and one plasma transferred arc for heating and melting the feed wire.
Abstract:
This invention relates to a method and reactor of manufacturing an object by solid freeform fabrication, especially an object made of titanium or titanium alloys. The reactor of production of an object of a weldable material by solid freeform fabrication comprises a reactor chamber which is closed to the ambient atmosphere, wherein the reactor is given a design such that all adjacent wall elements forming the reactor chamber are joined with an obtuse angle (larger than 90°), the actuator located below the reactor chamber is given a design such that the actuator protrudes into the reactor chamber through an opening at the bottom of the reactor chamber holding the support substrate inside the reactor chamber, the actuator located outside the reactor chamber is given a design such that the actuator protrudes into the reactor chamber through an opening at the side of the reactor chamber holding the high energy plasma transferred arc welding torch with wire feeder of the weldable material inside the reactor chamber.
Abstract:
A process for producing a weldable titanium or titanium alloy wire characterised in that full consolidation of the wire is achieved via solid-state processing entailing compaction, extrusion, and rolling, whereby melting of the constituent titanium sponge particles does not occur.
Abstract:
This invention relates to a method and arrangement for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by supplying the metallic feed material in the form of a wire and employing two gas transferred arcs, one plasma transferred arc for heating the deposition area on the base material and one plasma transferred arc for heating and melting the feed wire.
Abstract:
This invention relates to a method and reactor of manufacturing an object by solid freeform fabrication, especially an object made of titanium or titanium alloys. The reactor of production of an object of a weldable material by solid freeform fabrication comprises a reactor chamber which is closed to the ambient atmosphere, wherein the reactor is given a design such that all adjacent wall elements forming the reactor chamber are joined with an obtuse angle (larger than 90°), the actuator located below the reactor chamber is given a design such that the actuator protrudes into the reactor chamber through an opening at the bottom of the reactor chamber holding the support substrate inside the reactor chamber, the opening is sealed by at least one elastic gas impermeable membrane which is gas tight attached to the reactor wall at the opening and to the actuator, the actuator located outside the reactor chamber is given a design such that the actuator protrudes into the reactor chamber through an opening at the side of the reactor chamber holding the high energy plasma transferred arc welding torch with wire feeder of the weldable material inside the reactor chamber, the opening is sealed by the at least one elastic gas impermeable membrane which is gas tight attached to the reactor wall at the opening and to the actuator, and the reactor is equipped with at least one closable gas inlet located at the lowest level of the reactor chamber and at least one closable gas outlet located at the highest level of the reactor chamber.