This invention relates to a method of forming sections of seamless titanium or titanium alloy pipe. The method involves providing a substrate for forming pipe and a sleeve of a section of pipe on the substrate. The pipe section has an end from which the substrate projects. The pipe is formed by spraying particles of titanium or titanium alloy generally parallel to a longitudinal axis of the substrate to impact a face of the end and to cause particles to bond to and to accumulate on the pipe end to form pipe. The method further involves moving formed pipe longitudinally relative to the substrate to remove formed pipe from the pipe-forming substrate and continuing to spray titanium or titanium alloy particles onto the end face to cause further pipe to form continuously and integrally with the formed pipe. This enables a seamless titanium or titanium alloy pipe to be formed of any desired length.
B29C 41/24 - Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped articleApparatus therefor for making articles of indefinite length
B21C 37/06 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of tubes or metal hosesCombined procedures for making tubes, e.g. for making multi-wall tubes
B21C 37/16 - Making tubes with varying diameter in longitudinal direction
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
This invention relates to a method of forming seamless titanium and/or titanium alloy pipe. The invention also relates to a pipe formed by the method and a substrate on which the pipe is formed. The method involves providing a substrate on which to form pipe, spraying titanium or titanium alloy particles on to the substrate to cause the particles to bond together and to begin forming a pipe. The method further involves moving formed pipe relative to the substrate while continuing to spray particles so that further pipe is formed continuously and integrally with the formed pipe.
B21C 37/06 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of tubes or metal hosesCombined procedures for making tubes, e.g. for making multi-wall tubes
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B22F 5/12 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of tubes or wires
B21C 37/16 - Making tubes with varying diameter in longitudinal direction
C23C 24/00 - Coating starting from inorganic powder
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