Abstract:
A solid-solution strengthened superalloy weld composition, includes:
about 10 to about 15 wt% Co; about 18 to about 22 wt% Cr; about 0.5 to about 1.3 wt% Al; about 3.5 to about 4.5 wt% Ta; about 1 to about 2 wt% Mo; about 13.5 to about 17.0 wt% W; up to about 0.08 wt% C; up to about 0.06 wt% Zr; up to about 0.015 wt% B; about 0.4 to about 1.2 wt% Mn; about 0.1 to about 0.3 wt% Si; and balance Ni.
Abstract:
A cermet comprises a ceramic component (e.g., WC) and a binder comprised of a major component (e.g., one or more of iron, nickel, cobalt, their mixtures, and their alloys) and at least one additive component (e.g., one or more of ruthenium, rhodium, palladium, osnium, iridium, and platinum) which imparts corrosion resistance to the cermet. Parts composed of this cermet include plungers for hyper compressors used in the corrosive environments generated during the manufacture of low density polyethylene (LDPE) or ethylene copolymers.
Abstract:
A dry vacuum pump comprises a stator component and at least one rotor component. To improve the tolerance of the pump to corrosive gases passing through the pump, the stator component and/or said at least one rotor component are formed from silicon-molybdenum (SiMo) ductile iron.
Abstract:
A pump having a rotor that is rotatable about a rotation axis and comprises a rotor hub and a rotor collar that extends from the rotor hub in the radial direction and encircles it in an undulating manner, and a pump housing which comprises a first axial housing component, a central annular housing component and a second axial housing component, wherein a pump duct is formed in the axial direction by the first and second housing components and in the radial direction by the central annular housing component and the rotor, and also a pump in which the annular pump duct has a constant cross section and connects a first radially external inlet/outlet space to a second radially external inlet/outlet space, and the pump may include a blocking device which is arranged between the first radially external inlet/outlet space and the second radially external inlet/outlet space and which comprises a blocking element which blocks the pump duct in the axial direction on both sides of the rotor collar.
Abstract:
A shape memory alloy that excels in workability and permits repeated use at high temperature. There is provided a high-temperature shape memory alloy characterized by being composed of transformation temperature increasing additive elements containing 34.7 to 48.5 mol% nickel and at least one of zirconium and hafnium wherein the sum of zirconium and hafnium is in the range of 6.8 to 22.5 mol%; workability enhancing additive elements containing at least one of niobium and tantalum wherein the sum of niobium and tantalum is in the range of 1 to 30 mol%; 2 mol% or less boron; and the balance titanium and unavoidable impurities.
Abstract:
Die Erfindung betrifft einen Hochdruckverdichter einer Gasturbine mit mindestens einer Blisk, also einer Scheibe (2) mit einer Vielzahl von Schaufeln (3), die an der Scheibe (2) angeordnet sind, wobei die Blisk mindestens einen Titanwerkstoff aus der Gruppe aufweist, die Ti-6246 und Ti-6242 umfasst, wobei sich die Werkstoffe der Scheibe (2) und der Schaufel (3) der Blisk in ihrer chemischen Zusammensetzung und/oder der Mikrostruktur des Gefüges unterscheiden. Die Schaufeln (3) sind insbesondere durch ein mit hochfrequentem Strom unterstütztes Pressschweißverfahren an der Scheibe (2) angeschweißt, wobei der Strom direkt durch die Fügeflächen geleitet wird und dort zur lokal begrenzten Aufschmelzung führt.