JP2010528187A5 - - Google Patents

Claims (13)

i) Sr in the range of 0.010 to 0.025 mass% ,
ii) TiB ₂ in an amount ranging from 0.001 to 0.005% by weight B, as measured by boron content ;
Beyond B a stoichiometric binding amounts in iii) TiB _2, 0.16% or less of excess Ti, and
iv) Si up to 1.2% by weight,
An aluminum alloy comprising: From alloys containing mainly aluminum and copper; alloys containing mainly aluminum and manganese; alloys containing mainly aluminum and magnesium; alloys containing mainly aluminum, magnesium and silicon; and alloys containing mainly aluminum, magnesium, zinc and copper 2. The aluminum alloy according to claim 1 , wherein the aluminum alloy is selected from the group consisting of: The aluminum alloy according to any one of claims 1 to 2 , comprising aluminum, magnesium and silicon. Furthermore, 0.010 to 0.020 wt% Scope of Sr, and as measured by its boron content, 0.002 to 0.004 mass% of B, including the range of TiB ₂ in an amount comprised, according to claim 3, wherein the aluminum alloy. The aluminum alloy according to any one of claims 1 to 4 , which is an alloy for modeling casting. The aluminum alloy according to any one of claims 1 to 4 , which is an alloy for die casting. The aluminum alloy according to any one of claims 1 to 4 , wherein the alloy is an alloy casting produced by using a semi-solid casting method. Expressed in mass%, measured as 0.6 to 0.8 Si, Fe up to 0.12, 0.15 to 0.40 Cu, 0.8 to 1.2 Mg, 0.04 to 0.10 Cr, 0.010 to 0.025 Sr, boron content 0.005 wt% of B, beyond B stoichiometric bound amount in Ti B _2, 0.16% or less of excess Ti, are each less than 0.05, as a whole less than 0.15 incidental impurities, and 3. The aluminum alloy according to claim 1, wherein the balance is Al. 9. Aluminum alloy according to claim 8 , for casting by a semi-solid process. Expressed in mass%, measured as 0.6 to 0.8 Si, Fe up to 0.12, 0.15 to 0.40 Cu, 0.8 to 1.2 Mg, 0.04 to 0.10 Cr, 0.010 to 0.025 Sr, boron content To 0.005 mass% B , Ti B ₂ beyond the amount stoichiometrically bound to B, 0.16% or less excess Ti, Mn up to 0.45 mass%, however, total Mn + Fe is 0.55 to 0.65 mass 2. The aluminum alloy according to claim 1, wherein said aluminum alloy has a composition of an incidental impurity of less than 0.05 and less than 0.15 as a whole, and a balance of Al.   The aluminum alloy according to claim 1, for processing in a completely molten state. A method for processing an aluminum alloy according to any one of claims 1 to 11 , having a liquidus temperature and a solidus temperature,
(1) preparing an alloy comprising a semi-solid within the range of the liquidus temperature and solidus temperature of the alloy;
(2) heating the alloy to a high alloy initial temperature equal to or higher than the liquidus temperature to sufficiently melt the alloy;
(3) reducing the temperature of the alloy from a high temperature of the initial metal alloy to a semi-solid temperature below the liquidus temperature and above the solidus temperature;
(4) maintaining the alloy at the semi-solid temperature for a period of time sufficient to produce a semi-solid structure in the alloy in which a spherical solid phase is dispersed in the liquid phase, The semi-solid structure comprises less than about 50% by weight of a solid phase;
(5) removing at least some of the liquid phase present in the semi-solid structure of the metal alloy to produce a solid-rich semi-solid structure of the alloy. The removing step comprises removing the liquid phase until the solid-rich semi-solid structure contains about 35 to about 55 wt% solid phase; and
(6) forming the alloy having a semi-solid structure rich in the solid into a predetermined shape;
A method comprising the steps of: 13. The method of claim 12 , wherein the alloy in a molten state can be maintained at a predetermined temperature for a period of time sufficient to produce a semi-solid state in the alloy.