A high strength and wear resistant multi-element copper alloy is disclosed. The multi-element copper alloy comprises: 80-90 atomic percent Cu, 0.1-4 atomic percent Al, 6-10 atomic percent Ni, 0.1-3 atomic percent Si, 0.1-2 atomic percent V and/or Nb, and 0.1-2 atomic percent M. Experimental data reveal that, after being applied with an aging treatment under 450 degrees Celsius for 50 hours, hardness and strength of the multi-element copper alloy are both significantly enhanced because of age hardening, and softening due to overaging is not observed on the multi-element copper alloy. Moreover, measurement data have indicated that, this novel multi-element copper alloy exhibits better wear resistance superior to that of the conventional copper alloys.

An alloy composition is provided. The alloy composition includes from about 0.5 wt. % to about 1.5 wt. % silicon (Si), from about 0.5 wt. % to about 1.5 wt. % magnesium (Mg), from about 0.1 wt. % to about 0.2 wt. % zirconium (Zr), from about 0.2 wt. % to about 0.4 wt. % iron (Fe), from 0 wt. % to about 0.3 wt. % chromium (Cr), from 0 wt. % to about 0.3 wt. % manganese (Mn), from about 0 wt. % to about 1 wt. % copper (Cu), from about 0 wt. % to about 0.2 wt. % titanium (Ti), from about 0 wt. % to about 1 wt. % vanadium (V), and a balance of aluminum (Al). Greater than or equal to about 60% of the alloy composition is derived from Al scrap. Methods of forming the alloy composition and methods of forming an extruded article from the composition are also provided.

Production of a bulk Al-RE alloy body (product) using cast billets/ingots (cooling rates <100 C/s) or rapidly solidified Al-RE particulates (cooling rates 10.sup.2-10.sup.6° C./second) that have beneficial microstructural refinements that are further refined by subsequent consolidation to produce a consolidated bulk alloy product having excellent mechanical properties over a wide temperature range such as up to and above 230° C.

A method for manufacturing an ingot made of titanium-based metallic compound, includes providing raw material fragments; melting the raw material fragments into a liquid metal in at least one basin; keeping in the molten state the liquid metal in the at least one basin; pouring the liquid metal from the at least one basin into a crucible by overflow from the at least one basin into the crucible; forming an ingot by cooling of the liquid metal into the crucible; wherein the method further includes preheating the raw material fragments before the melting of the raw material fragments with a preheating temperature higher than or equal to 75% of the liquidus temperature of the raw material fragments, and lower less than the liquidus temperature of the raw material fragments.

A method for manufacturing an ingot made of titanium-based metallic compound, includes providing raw material fragments; melting the raw material fragments into a liquid metal in at least one basin; keeping in the molten state the liquid metal in the at least one basin; pouring the liquid metal from the at least one basin into a crucible by overflow from the at least one basin into the crucible; forming an ingot by cooling of the liquid metal into the crucible; wherein the method further includes preheating the raw material fragments before the melting of the raw material fragments with a preheating temperature higher than or equal to 75% of the liquidus temperature of the raw material fragments, and lower less than the liquidus temperature of the raw material fragments.

Support substrates are used in certain additive fabrication processes to permit processing of an object. For additive fabrication processes with materials that are sintered into a final part, a multi-layer support substrate of interleaved support and interface layers is fabricated to support an object while reducing an impact of friction on shrinkage of the part during the sintering process.

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Na and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely controlled through the apex temperature (T.sub.c) of the BCC phase miscibility gap, expressed by (Equation 1) below.
T.sub.c(K)=881.4+331.7*x+546.7*y+893.0*x*z (provided that, 0≤x≤1, 0≤y≤0.2, 0≤x+y≤1, and 0≤z≤1)  (Equation 1)

Provided is an aluminum alloy for a cable conductor. Specifically, the present invention relates to an aluminum alloy for a cable conductor, which is excellent in both mechanical properties, such as tensile strength, at room temperature and high temperatures and elongation, and electrical conductivity, is simple to manufacture at low costs, and is eco-friendly.

An apparatus for use in conjunction with a charge well of a furnace containing a molten metal pool into which metal chips are introduced for melting. The apparatus includes a sidewell having a pump well and a charge well. The pump well houses a molten metal pump. The charge well houses a scrap submergence device. The pump well and the charge well are in fluid communication via a passage in a bridge wall that divides the pump well from the charge well. The bridge wall defines a semi-circular end wall of the charge well. The scrap submergence device is capable of clockwise and counterclockwise rotation at variable speed.

An apparatus for use in conjunction with a charge well of a furnace containing a molten metal pool into which metal chips are introduced for melting. The apparatus includes a sidewell having a pump well and a charge well. The pump well houses a molten metal pump. The charge well houses a scrap submergence device. The pump well and the charge well are in fluid communication via a passage in a bridge wall that divides the pump well from the charge well. The bridge wall defines a semi-circular end wall of the charge well. The scrap submergence device is capable of clockwise and counterclockwise rotation at variable speed.