Provided is a method of producing an Al alloy cast material capable of properly adjusting an additive amount of Ti. The present invention is directed to a method of producing an Al alloy cast material in which an Al alloy molten metal supplied to a casting machine through a molten metal passage is solidified by the casting machine to produce an Al alloy cast material. The production method of the present invention includes a primary Ti-addition step of preliminarily adding Ti to an Al alloy molten metal before flowing through a molten metal passage and a secondary Ti-addition step of adding Ti to an Al alloy molten metal flowing through a molten metal passage by a feeder.

The invention relates to a frame for a ball game racket comprising a handle region and a head region with a bridge, wherein a part of the head region and/or the handle region comprise(s) a carbon fiber composite material and wherein the bridge comprises magnesium and is formed as one part.

A hypereutectic aluminum silicon high pressure die cast alloys is disclosed herein having 16% to 23% by weight silicon, 0.01% to 1.5% by weight iron, 0.01% to 0.6% by weight manganese, 0.01% to 1.3% by weight magnesium, 0.05% to 0.20% by weight strontium and the balance aluminum. The iron constituency may me modified to 0.01% to 0.7% by weight iron, or 0.01% to 0.2% by weight iron. The manganese constituency may be modified to 0.01% to 0.5% by weight manganese. The strontium constituency may be modified to 0.05% to 0.1% by weight strontium. The exhibits an elongation of at least 2%, an average ultimate tensile strength of greater than 250 MPa, and yield strength of greater than 200 MPa. The microstructure has a volume fraction of primary silicon at greater than 10% and a volume fraction of modified aluminum-silicon eutectic at 45% to 90%.

The present invention is an aluminum alloy for low-pressure casting, and the aluminum alloy is made of an AlSiCuMg alloy and contains: 8.0 to 12.6 mass % of Si; 1.0 to 2.5 mass % of Cu; 0.3 to 0.8 mass % of Mg; and 0.2 mass % or less of Ti, wherein the aluminum alloy further contains X mass % of P, Y mass % of Na, and Z mass % of Sr, with the balance including Al and inevitable impurities, and wherein a content of P, a content of Na, and a content of Sr satisfy all of the following relationships: 0.45Y+0.24Z+0.003X0.45Y+0.24Z+0.01; 0Y0.01; and 0Z0.03. The present invention ensures surface smoothness of the casted article by specifying the P content. This minimizes a surface segregation layer even in production of a casted article using a molten metal containing a eutectic structure modifier such as Na.

A method and alloys for low pressure permanent mold casting without a coating are disclosed. The method includes preparing a permanent mold casting die that is devoid of die coating or lubrication along the die surface, preparing a permanent mold casting alloy, pushing the alloy into the die under low pressure, cooling the permanent mold casting, and removing the casting from the die. One alloy has 4.5-11.5% by weight silicon; 0.45% by weight maximum iron; 0.20-0.40% by weight manganese; 0.045-0.110% by weight strontium; 0.05-5.0% by weight copper; 0.01-0.70% by weight magnesium; and the balance aluminum. Another alloy has 4.2-5.0% by weight copper; 0.005-0.45% by weight iron; 0.20-0.50% by weight manganese; 0.15-0.35% by weight magnesium; 0.045-0.110% by weight strontium; 0.50% by weight maximum nickel; 0.10% by weight maximum silicon; 0.15-0.30% by weight titanium; 0.05% by weight maximum tin; 0.10% by weight maximum zinc; and the balance aluminum.

A steering-wheel core eliminating or reducing the need to perform finishing processing after casting and decreasing a manufacturing cost even when the steering-wheel core is cast using a molten metal process. The steering wheel core includes a boss core portion coupled to a steering shaft, a rim core portion and a spoke core portion. The boss core portion forms a nut seat surface that makes contact with a nut when the nut is fastened to a distal end of the steering shaft. A recess is formed in the nut seat surface depressed toward a back surface side of the boss core portion. The recess is preferably provided in an annular form so as to surround the circumference of the nut seat surface.

The present invention provides an AlMgSi-based hot forming aluminum alloy plate which has not only high age-hardening property but also a high m value in a high strain rate range and excellent surface properties after forming and which is suitable for hot forming. The hot forming aluminum alloy plate comprises an aluminum alloy comprising 0.3 to 1.8 mass % Mg, 0.6 to 2.0 mass % Si and 0.04 to 0.20 mass % Fe. In the aluminum alloy, Mn content is restricted to 0.030 mass % or less, and Cr content is restricted to 0.030 mass % or less, and a balance comprises Al and unavoidable impurities. The hot forming aluminum alloy plate has an electrical conductivity of 60% or less according to IACS %. A production method of the hot forming aluminum alloy plate is also provided.

A steering-wheel core and a method for casting the same capable of eliminating the need to perform finishing processing after casting and decreasing manufacturing cost even when the steering-wheel core is cast using a molten metal. The method for casting a steering-wheel core (100) includes: providing a protruding portion (92) in a surface (91) of an inner surface of a casting die (90), with the surface defining a nut seat surface; and causing a molten metal to hit on the protruding portion (92) when the molten metal flows into the casting die (90) such that a change occurs in the flowing direction of the molten metal flowing toward the surface (91) that defines the nut seat surface.

A cylinder liner for an internal combustion engine may include an aluminum alloy material including a magnesium content of at least 0.3% by weight, a liner body having a circumferential face, and an adapter layer of silicon oxide disposed on the circumferential face. The adapter layer may include at least one of a potassium oxide content and a sodium oxide content of greater than or equal to 0% by weight.

Embodiments of the present disclosure provide a die casting aluminum alloy, including constituents with the following mass percentages: silicon: 4.0% to 10.0%; magnesium: 0.2% to 1.0%; copper: 0.1%; manganese: 0.1%; zinc: 0.1%; ferrum: 1.3%; titanium: 0.2%; inevitable impurities: 0.15%; and the rest: aluminum. The die casting aluminum alloy has a high heat-conducting property, good formability, high corrosion resistance, and a good mechanical property. This can resolve a prior-art problem that forming and heat dissipation requirements of a communications product with a complex structure, high heat flux density, and large power cannot be met at the same time because it is difficult for a die casting aluminum alloy to have both a high heat-conducting property and good formability. The embodiments of the present disclosure further provide a production method of the die casting aluminum alloy and a communications product.