A system and method for continuous casting. The system includes a melt chamber, a withdrawal chamber, and a secondary chamber therebetween. The melt chamber can maintain a melting pressure and the withdrawal chamber can attain atmospheric pressure. The secondary chamber can include regions that can be adjusted to different pressures. During continuous casting operations, the first region adjacent to the melt chamber can be adjusted to a pressure that is at least slightly greater than the melting pressure; the pressure in subsequent regions can be sequentially decreased and then sequentially increased. The pressure in the final region can be at least slightly greater than atmospheric pressure. The differential pressures can form a dynamic airlock between the melt chamber and the withdrawal chamber, which can prevent infiltration of the melt chamber by non-inert gas in the atmosphere, and thus can prevent contamination of reactive materials in the melt chamber.

A die-casting magnesium alloy. The die-casting magnesium alloy comprises, by mass percent, 1% to 5% of La, 0.5% to 3% of Zn, 0.1% to 2% of Ca, 0.1% to 1% of Mn and the balance Mg and other inevitable impurities. The die-casting magnesium alloy manufacturing method comprises smelting, refinement and die-casting. The die-casting magnesium alloy has good mechanical performance, die-casting performance and heat conduction performance.

A machine for forming metal bars, in particular for producing ingots made of precious metal such as gold, silver, precious alloys, as well as other pure metals or different alloys, in the form of solid metal powder, grits or swarf of various sizes, having an ingot mold and a cover for closing the ingot mold when filled, the ingot mold has a dimension in height such that the cover passes from a first position to a second position when the volume occupied by the mass of metal that fills the ingot mold reduces gradually up to one third of the initial solid volume. In the first position the cover rests on the metal that fills the ingot mold and remains raised with respect to an abutting edge of the ingot mold, in such a manner that the bottom of the cover compresses and thus uniformly compacts the powders, the grits or the swarf so that, during the melting step, in the second position, the cover lowers progressively as the metal melts, until it rests on the abutting edge of the ingot mold, thus hermetically closing the ingot mold.

A machine for forming metal bars, in particular for producing ingots made of precious metal such as gold, silver, precious alloys, as well as other pure metals or different alloys, in the form of solid metal powder, grits or swarf of various sizes, having an ingot mold and a cover for closing the ingot mold when filled, the ingot mold has a dimension in height such that the cover passes from a first position to a second position when the volume occupied by the mass of metal that fills the ingot mold reduces gradually up to one third of the initial solid volume. In the first position the cover rests on the metal that fills the ingot mold and remains raised with respect to an abutting edge of the ingot mold, in such a manner that the bottom of the cover compresses and thus uniformly compacts the powders, the grits or the swarf so that, during the melting step, in the second position, the cover lowers progressively as the metal melts, until it rests on the abutting edge of the ingot mold, thus hermetically closing the ingot mold.

A reinforced magnesium matrix composite includes a quasicrystal and alumina mixture particles reinforcement phase and a magnesium alloy matrix, where the weight ratio of the quasicrystal and alumina mixture particles reinforcement phase to the magnesium alloy matrix is (4-8) to 100; the magnesium alloy matrix including by weight 1000 parts of magnesium, 90 parts of aluminum, 10 parts of zinc, 1.5-5 parts of manganese, 0.5-1 part of silicon and 0.1-0.5 part of calcium; the quasicrystal and alumina mixture particles reinforcement phase including by weight 40 parts of magnesium, 50-60 parts of zinc, 5-10 parts of yttrium and 8-20 parts of nanometer alumina particles of which the diameter is 20-30 nm; and the quasicrystal and alumina mixture particles reinforcement phase having a size of 100-200 mesh.

This invention pertains to plastic injection mold tooling, and also large forgings, formed from a low carbon mold steel having markedly increased hardening and hardenability properties in large sections as contrasted to currently available commercial products. The above attributes are obtained together with equal or better machinability and improved mold parting line wear. When manufactured in conjunction with a double melt process, this invention can improve significantly polishing characteristics and other attributes of molded parts in tooling sets.

There is provided a copper-titanium alloy with large fluctuations in Ti concentration. The copper-titanium alloy for electronic components contains 2.0 to 4.0% by mass of Ti and, as a third element, 0 to 0.5% by mass in total of one or more selected from a group consisting of Fe, Co, Mg, Si, Ni, Cr, Zr, Mo, V, Nb, Mn, B, and P, with a balance being copper and unavoidable impurities, wherein when crystal grains having <100> orientation in a section parallel to a rolling direction are subjected to area analysis of Ti concentration in a matrix phase, a difference between a maximum Ti concentration and a minimum Ti concentration is 5 to 16% by mass.

A rolled foil formed of the FeCu alloy according to an embodiment of the present invention is manufactured to consist of 3 to 30 wt % iron and 70 to 97 wt % copper having a thickness of 100 m to 10 m, by casting a molten metal of a FeCu parent alloy and a metal copper into a slab, heat-treating the slab, and roll-milling the heat-treated slab by using a multi-pass rolling mill with the total reduction ratio of 90% or higher. In this regard, the FeCu alloy rolled foil according to the present invention provides an effect of shielding electromagnetic waves of 80 dB or more within high frequencies ranging between 1 GHz to 1.5 GHz.

A rolled foil formed of the FeCu alloy according to an embodiment of the present invention is manufactured to consist of 3 to 30 wt % iron and 70 to 97 wt % copper having a thickness of 100 m to 10 m, by casting a molten metal of a FeCu parent alloy and a metal copper into a slab, heat-treating the slab, and roll-milling the heat-treated slab by using a multi-pass rolling mill with the total reduction ratio of 90% or higher. In this regard, the FeCu alloy rolled foil according to the present invention provides an effect of shielding electromagnetic waves of 80 dB or more within high frequencies ranging between 1 GHz to 1.5 GHz.

The present invention relates to a method of manufacturing of a casted part or ingot of a metallic alloy attaining a minimal segregation in the casting process, for alloys which are prone to segregate. The method can also be employed to refine the grain and microstructure of the obtained alloys. The method is especially interesting for Fe, Ti, Co or Ni based alloys. The method is very inexpensive and can be applied for the obtaining of very large cross-sections. An additional feature of the method is that it can be employed to capitalize impurities.