摘要:
Copper is separated from nickel present therewith in a sulfate solution by neutralizing to precipitate all the copper and some nickel as basic compounds, and thereafter reducing the copper in the basic compounds to elemental form through formation of cuprous sulfite and thermal dissociation of the latter.
摘要:
An improvement in the process of flotation of sulfide minerals from basic gangue involving employing in association with a collector an alkylamidohydroxylated quaternary amine salt.
摘要:
A process for extracting metal values from sea nodules is provided in which nickel, cobalt and copper values are selectively extracted by leaching raw sea nodules in an aqueous ammoniacal medium in the presence of a reducing agent for tetravalent manganese and carbonate to precipitate the reduced manganese as manganous carbonate.
摘要:
A process is disclosed for producing a high density spray cast metal body from a highly energetic atomized metal stream by directing said atomized stream into the interior of a mold and causing said stream to scan and fill said mold interior by effecting relative movement between said atomized metal stream and said mold, thereby producing a fine grained spray cast metal body of high density.
摘要:
Base metal chlorides are recovered from fused alkali metal or alkaline earth metal halide salts by precipitation with at least one reagent selected from the group consisting of hydrogen, hydrogen sulfide or aluminum. Advantageously, the bulk of the base metals are precipitated by combinations of hydrogen sulfide and hydrogen to produce a precipitate having a controlled sulfur content that is molten at temperatures between about 750.degree. C. and 900.degree. C., and final salt cleaning is achieved by precipitating residual base metals with aluminum. The melting point of the precipitate is also controlled by the ratio of nickel to other base metals in the salt.
摘要:
A nickel-chromium-titanium filler alloy for inert gas shielded-arc welding of 50% Cr, 50% Ni type alloys. The wrought alloy is characterized by a single phase austenitic microstructure and contains, by weight, from about 42 to about 46% chromium, from about 0.1 to about 1.8% titanium, from about 0.01 to about 0.1% carbon, and up to about 0.1% magnesium with the balance, apart from incidental elements, essentially nickel. The alloy provides sound welds having a two phase microstructure that afford elevated temperature strength and corrosion resistance equal to that afforded by base metals of the 50% Cr, 50% Ni type.
摘要:
A highly-castable, ductile, corrosion-resistant and weldable stainless steel intended for exposure in marine environments. A highly satisfactory composition of the alloy is 24% Ni, 24% Cr, 4% Mo, 2% Si, 0.2% B and balance iron.
摘要:
A powder metallurgy product comprising iron and chromium, and/or aluminum and characterized by elongated grains that are stable at elevated temperatures.A method of producing such a product, including mechanically alloying a suitable powder charge, consolidating the mechanically alloyed powder, working the consolidated product so as to achieve therein a reduction of at least about 10%; and, then, heating the worked product to produce coarse elongated grains therein.The product produced according to the present invention exhibits good oxidation resistance and good room temperature and elevated temperature strength and ductility.
摘要:
A carbidic low expansion alloy which is especially useful as a cast structure requiring close dimensional tolerances is comprised of about 21 to about 55% nickel, up to about 18% cobalt, from about 0.3 to about 2.5% carbon, up to about 3% chromium, from about 0.2 to about 1.2% vanadium, up to about 3% molybdenum, up to about 2% zirconium, niobium and tungsten, and the balance essentially iron, with the provisos:% Ni + 0.75 (% Co) = 30.5 to 55, Cr + Mo + V + Zr + Nb + W = 1 to 4 Ni : Fe .gtorsim. 0.4:1.
摘要翻译:特别可用作需要紧密尺寸公差的铸造结构的卡式低膨胀合金包括约21至约55%的镍,至多约18%的钴,约0.3至约2.5%的碳,至多约3%的铬 ,约0.2至约1.2%的钒,至多约3%的钼,至多约2%的锆,铌和钨,余量基本上为铁,条件是:Ni + 0.75(%Co)= 30.5至55 ,Cr + Mo + V + Zr + Nb + W = 1〜4 Ni:Fe APPROXGREATER 0.4:1。