Kaiser Aluminum

About: Kaiser Aluminum is a based out in . It is known for research contribution in the topics: Alloy & Corrosion. The organization has 546 authors who have published 504 publications receiving 6554 citations. The organization is also known as: Kaiser Aluminum and Chemicals.

Contained quench system for controlled cooling of continuous web

Abstract: A method and apparatus for continuously cooling a moving web while simultaneously removing the cooling fluid from the web in which a stream of quenching fluid (18) is applied transversely across the web (12) to cool it and a fluid containment gas is positioned on either side of the quenching fluid to direct a containment fluid (50,51) toward the quenching fluid to establish a continuous containment fluid curtain stream to prevent passage of the quenching fluid beyond the point of which the containment fluid is introduced.

Novel oxide-dispersion-strengthened copper alloys from rapidly solidified precursors: Part 1. Microstructural development

Abstract: ZrO2, Y2O3, and rare earth oxides with related structures are attractive candidates for dispersion strengthening of copper alloys but pose significant processing challenges owing to the low solubility of the oxide-forming elements in Cu. It is shown that the problems may be circumvented by a synthesis approach coupling rapid solidification and internal oxidation, followed by standard powder metallurgy consolidation. Cu-Zr and Cu-Y alloys were melt spun into ribbons ∼-50-to 150-Μm thick and internally oxidized at 1023 to 1223 K to yield ∼1 vol pct of ZrO2 or Y2O3 particles ranging in size from 5 nm up to ∼3150 nm. The coarser oxides result from direct oxidation of the intermetallic segregate, whereas the finer ones are generated by a dissolution-reprecipitation process. The relative proportions of fine and coarse oxides and the homogeneity of the distribution are related to segregation scale in the melt-spun ribbon and the relative permeabilities of oxygen and the oxidizable element in the alloy, which depend on the internal oxidation temperature. The oxide dispersoids were mostly cubic zirconia or cubic yttria and exhibited predominantly cube-on-cube orientation relationships with the matrix. Analysis of particle shapes revealed that the dominant interfaces are of the type {001}OX ∥ {001}Cu and {1¯11}OX ∥ {1¯11}Cu and could be explained by image charge interaction concepts. Extrusion produced an elongated grain structure but no significant changes in the oxide distribution.

Purification of iron containing acidic solutions

Abstract: Iron containing aqueous, acidic solutions, such as acidic stripping solutions used to remove iron from organic extractants, are purified by subjecting the acidic solution to a hydrothermal treatment at elevated temperatures and pressures which cause the precipitation of the dissolved iron in easily separable form The hydrothermal treatment is accomplished at temperatures in excess of about 100° C The process can be applied to acidic solutions containing the dissolved iron in the form of ferric sulfate, ferric nitrate or chloride and is particularly adaptable to acidic stripping solutions resulting from the purification of organic extractants employed to extract iron impurities from solutions obtained in the acid leaching of clays, ores and concentrates

Self-centering bottom block assembly for D.C. casting

Abstract: This invention relates to an improved self-centering bottom block assembly for DC casting The assembly comprises a bottom block which is slidably mounted on a supporting surface and which is provided with at least two guide extensions Positioned below the DC mold are at least two recessed guide surfaces, the lower portion of which converges in the direction of the discharge end of the mold The horizontal and rotational movement of the bottom block is restricted so as to ensure the insertion of the guide extensions into the recess defined by the guide surfaces and thereby guide the bottom block into the mold bore without contacting the mold body

High speed transfer of strip in a continuous strip processing application

Abstract: Apparatus and a process for the high-speed coiling of an aluminum strip. The high speed coiling can be accomplished throughout a continuous casting process without slowing the coiling as the present invention enables the transfer of the moving strip from one coil to an empty mandrel without slowing the line speed. Since line speeds can be approximately 3600 feet per minute, this represents an advance in process technology. Generally, the transfer of the moving strip is accomplished using a very high speed knife (28), and a belt wrapper (24). The moving strip is accumulated on one mandrel (2) to form a coil, the coil is moved away from the knife and a second mandrel (4) is brought into position. The knife is positioned at the moving aluminum strip and accelerated to cut the strip and deflect it to a tucking roll with a moving belt. The moving strip is forced around the second mandrel and starts to wind to form a coil. The completed coil is removed and the process is repeated.