New with weldability corrosion-resistant aluminum-magnesium alloy with a high content of magnesium, primarily for automotive applications
(57) Abstract:The invention relates to possessing weldability corrosion-resistant aluminum-magnesium alloy with a high content of magnesium, containing as an essential component of a three-part aluminum-scandium-zirconium phase. This alloy contains at least 5-6 wt.% magnesium (Mg), 0.05 to 0.15 wt.% zirconium (Zr), 0.7 to 1 wt.% manganese (Mn), 0.01 to 0.2 wt.% titanium (Ti), 0.05 to 0.5 wt.% one or more elements of the group consisting of scandium (Sc), cerium (CE), terbium (Tb) and other lanthanides, the composition contains at least scandium (Sc), 0.005 wt.% cerium, and aluminum (Al) and inevitable inclusion of silicon (Si) in an amount of a maximum of 0.2 wt.%. The proposed item of the above alloy for motor vehicles manufactured by rolling, extrusion, welding or forging. The technical result of the invention to provide with weldability corrosion-resistant aluminum-magnesium alloy, which, along with high strength has a high threshold recrystallization. 2 S. and 3 C.p. f-crystals. The present invention relates to possessing weldability corrosion-resistant aluminum-magnesium alloy with high sofas. The alloy of this type is known, for example, from patent US 5624632 and thanks to its low density, high strength and corrosion resistance is of interest primarily for use in aircraft construction. Thanks additives of rare earth elements or elements such as rare earth, aluminum-magnesium alloy formed dispersoid contributing according to the above-mentioned U.S. patent to improve the strength and corrosion resistance. However, any data regarding characteristics of weldability of the alloy of this type in the specified U.S. patent no.Based on the foregoing, the present invention was based on the task to develop with weldability, corrosion-resistant aluminum-magnesium alloy with a high content of magnesium, which in its properties in terms of strength and corrosion resistance at least would not concede to the well-known alloy and in addition to good weldability would have a high threshold recrystallization. This problem is solved by the proposed aluminum-magnesium alloy according to p. 1 claims.Due to the fact that this new alloy has good weldability and high strength the PTO contains as alloying elements titanium, and cerium. The most optimum corrosion properties manifests alloy in which the ratio of manganese to scandium is less than two. Contained in its composition in contrast to the known alloy of titanium contributes additionally to act as a modifier increased strength, because titanium can replace the zirconium in the three-A1-Sc-Zr phase, although the solubility of titanium when compared with zirconium. Supplements cerium also contribute to not only increase strength, but also to increase the yield strength tensile and thermal stability.As was set forth, scandium at least within certain limits can be replaced by terbium. Note, however, that if such a change on the terbium to achieve the same properties as above, you want to introduce additives terbium more in comparison with replaceable scandium number.Especially durable and corrosion-resistant alloy contains at least about 0.15 wt.% scandium. Supplements lanthanides varies preferably in the range from 0.05 to 0.35 wt.%, however, such values in the case of using a mixture of lanthanides is specified in terms of the total amount of the mixture. In the alloy contains nei is 1. With the weldability of aluminum-magnesium alloy with a high content of magnesium, which includes three aluminum-scandium-zirconium phase, which includes at least 5-6 wt.% magnesium (Mg), 0.05 to 0.15 wt.% zirconium (Zr), 0.7 to 1 wt.% manganese (MT), 0.01 to 0.2 wt.% titanium (Ti), 0.05 to 0.5 wt.% one or more elements of the group consisting of scandium (Sc), cerium (CE), terbium (b) and other lanthanides, the composition contains at least scandium (Sc), 0.005 wt.% cerium, and aluminum (A1) and the inevitable inclusion of silicon (Si) in an amount of a maximum of 0.2 wt.%.2. Aluminum-magnesium alloy under item 1, characterized in that the ratio between the amounts of manganese and scandium is less than two.3. Aluminum-magnesium alloy under item 1, characterized in that the composition contains at least about 0.15 wt.% scandium (Sc).4. Aluminum-magnesium alloy under item 1 or 2, characterized in that the composition contains from 0.05 to 0.45 wt.% one or more elements from the group of lanthanides, primarily cerium (CE), neodymium (Nd), europium (EU), gadolinium (Gd), dysprosium (Dy), holmium (Ho), or erbium (Er).5. Item for vehicles and manufactured by rolling, extrusion, welding, or to
FIELD: soldering fuel assemblies of nuclear reactors, mainly manufacture of spacing grids made of tubular blanks.
SUBSTANCE: alloy contains next relation of ingredients, mass %: iron, 4.0 - 6.0; beryllium, more than 3.0 - 4.0; niobium, 0.9 - 1.1; copper, 4.0 - 8.0; tin, 1.0 - 3.0; chrome, 0.2 - 1.0; bismuth + arsenic, 0.0001 - 0.0018; sulfur, 0.0001 - 0.0015; zirconium and inevitable impurities, the balance. Alloy may contain in addition germanium in quantity 0.25 -2.5 mass %.
EFFECT: increased corrosion resistance and creep resistance, lowered melting temperature, reduced quantity of iron intermetallides in soldered joint.
2 cl, 1 tbl
FIELD: metallurgy; welding materials; welding alloys of Al-Mg, Al-Mg-Li and Al-Zn-Mg-Cu systems.
SUBSTANCE: proposed welding wire contains magnesium, zirconium, scandium, beryllium, boron, manganese, aluminum, neodymium and at least two elements from group containing terbium, tin and vanadium. Proposed wire possesses high resistance to exploitation corrosion and hot cracks in welded joints of Al-Mg, Al-Mg-Li and Al-Zn-Mg-Cu system.
EFFECT: enhanced corrosion resistance of welding wire.
2 tbl, 6 ex
FIELD: metallurgy, in particular solder for connection of heat hardenable aluminum alloys.
SUBSTANCE: claimed solder contains (mass %): silicon 4-12; germanium 4.6-25; strontium 0.003-0.01; cerium 0.05-0.15; and balance: aluminum. Additionally solder may contain 0.3-1.0 mass % of magnesium. Solder is obtained by ingot production, diffusion annealing at temperature being by 5-10°C higher than solidus temperature for 5-24 h and further cogging.
EFFECT: solder of decreased melting point; brazed constructions of increased strength.
4 cl, 1 ex
FIELD: sheet for soldering by means of brazing solder with corrosion resistance, method for making such articles.
SUBSTANCE: laminate sheet includes core made of 3xxx type alloy, gasket of aluminum alloy placed in one side of core and cladding of 4xxx type alloy for soldering by means of brazing solder placed on other side of gasket. After soldering sheet to part by means of brazing solder, continuous dense zone of Mn including dispersoids is formed in interface between core and gasket in the result of Si diffusion from cladding to core. Process for making such sheet comprises operations of producing composite including core of 3XXX alloy, cladding for soldering by means of brazing solder of 4XXX alloy and gasket of aluminum alloy placed between them; hot rolling of composite at temperature lower than 525°C for metallurgical joining of all components of composite together; cold rolling of composite till final size without subjecting it to heat treatment.
EFFECT: possibility for producing sheet suitable for any purpose having high corrosion resistance and moldability before soldering by means of brazing solder.
36 cl, 7 dwg, 7 tbl, 2 ex
SUBSTANCE: invention can be used for arc and plasma-jet hard-facing of wear-resistant layers on cars parts, operating in conditions of action of abrasive wear, impact loads, erosion at increased temperatures. Bars consist of cast compound materials on the basis of high-strength casting aluminium alloys, hardened by discrete high-modular, high-duty ceramic particles of silicon carbide (α-SiC) of hardness HV 1000. Amount of hardening particles in matrix alloy at its mid-size 28 or 40 mcm is 3-8 wt % or 3-10 wt %, respectively. Amount of silicon in matrix alloy is 7-12 wt %. Composite melt is poured by dimensions of bars for overlaying welding according to GOST 21449-75.
EFFECT: high strength and wearing capacity.
3 cl, 1 tbl, 2 dwg