37results about How to "Refined casting structure" patented technology

The invention relates to a novel copper and copper alloy plate belt electromagnetic auxiliary casting method and a device thereof; a fixed magnetic field generation device is arranged at the horizontal continuous casting crystallizer position of the copper and copper alloy plate slab; an external magnetic field has the intensity of 50-2000 Gauss; furthermore, a current is transversely applied between two side walls of the transverse side of a graphite crystallizer with the current intensity of 1-2000A; the current forms a loop transversely; the current loop is vertical to the axial direction of the plate belt; the magnetic mixing direction can be changed by changing the direction of the magnetic field or the current direction so as to form forcible mixing along the identical direction or reverse direction to the plate slab direction; the mixing can be axial continuous or intermittent mixing so as to lead the melt at the front edge of the crystallization bears a Lorentz force and forcibly mixed, thus prompting the solidified area to form a plurality of free crystal nucleuses and being beneficial to generating equiaxed grain; therefore, segregation and negative segregation is restrained, the casting tissue is fined, the plate slab surface quality and the processing yield of the plate belt are improved, the continuous production of bronze plate slab with high content of Sn is easy to realize, and the homogenous processing technology is simplified.

The invention discloses an Al-Fe-Cu-Mg-Cr series aluminum alloy for cables for coal mines and an aluminum alloy cable. The aluminum alloy contains the ingredients in percentage by weight: 0.2-1.1% of Fe, 0.01-0.4% of Cu, 0.001-0.4% of Mg, 0.005-0.2% of Cr, 0-0.1% of Si, 0-0.2% of B and the balance of Al and impurities. The aluminum alloy cable is produced through enabling the aluminum alloy to be subjected to the processes of melting, casting and rolling, so as to obtain aluminum alloy rods, then, carrying out drawing, stranding and softening, so as to form aluminum alloy wire cores, and then, carrying out extruded insulation, cabling and extruded sheathing or armoring on the conductor wire cores. The Al-Fe-Cu-Mg-Cr series aluminum alloy for the cables for the coal mines, disclosed by the invention, has the characteristics of high strength, high conductivity, good bending property and the like; the aluminum alloy cable produced from the aluminum alloy can meet the requirements on the properties of the cable in the field of the coal mines.

The invention discloses an Al-Fe-Cu-Mg-Zr series aluminum alloy and an aluminum alloy cable for coal mine cables, wherein the components contained in the aluminum alloy material and the weight percentages of each component are as follows: Fe: 0.2-1.1% ; Cu: 0.01‑0.4%; Mg: 0.01‑0.4%; Zr: 0.001‑0.2%; Si: 0‑0.1%; B: 0‑0.2%; the balance is Al and impurities; , casting and rolling processes to obtain aluminum alloy rods, which are then drawn, stranded, and softened to form aluminum alloy conductor cores, and then the conductor cores are made by extruding insulation, cabling, extruding sheathing or armoring Aluminum alloy cables. Provided is an Al-Fe-Cu-Mg-Zr series aluminum alloy for coal mine cables, which has the characteristics of high strength, high electrical conductivity, and good bending performance; performance requirements.