Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Mec International Co., Ltd.

Hiroaki Iwahori

Yasushi Iwata

Jun Yaokawa

Yoshio Sugiyama

Norihiro Amano

Yuichi Furukawa

Noriyuki Ueno

Takehito Kobayashi

Shuxin Dong

Kenichi Suzuki

Hiroyuki Ikuta

Fumio Kawahara

Hiroshi Hohjo

Yoshihiko Sugimoto

Toshio Horie

Hajime Ikuno

Takamasa Suzuki

Harumi Ueno

Isamu Ueda

Koji Yonekura

Takashi Nakamichi

Atsuto Okamoto

Tomoyasu Kitano

Yoshiyasu Takahashi

A free casting method according to the present invention includes, a lead-out step for leading out molten metal from a lead-out area (P) provided in a source of supply, e.g. a surface level of the molten metal, to retain the molten metal temporarily by surface films (F) generated on an outer surface, and a forming step for obtaining a formed body by solidifying retained molten metal (MS) led out along a set passage (L) depending on a desired casting shape, wherein the retained molten metal is solidified after being formed into the desired casting shape by applying an external force thereto at positions between an unrestrained root portion of the retained molten metal in vicinity of the surface level of the molten metal and a solidification interface defined as a boundary between the retained molten metal and the formed body in the forming step.

Free casting method, free casting apparatus, and casting

A free casting method according to the present invention includes, a lead-out step for leading out molten metal from a lead-out area provided in a source of supply, e.g. a surface level of the molten metal, to retain the molten metal temporarily by surface films generated on an outer surface, and a forming step for obtaining a formed body by solidifying retained molten metal led out along a set passage depending on a desired casting shape, wherein the retained molten metal is solidified after being formed into the desired casting shape by applying an external force thereto at positions between an unrestrained root portion of the retained molten metal in vicinity of the surface level of the molten metal and a solidification interface defined as a boundary between the retained molten metal and the formed body in the forming step.

A molten alloy solidification analyzing method of the invention is characterized in that the amount of change in fraction solid is calculated based on the solidification rate of molten alloy and the solidification rate parameter that is a parameter for evaluating the influence of the solidification rate on solidification of the molten alloy, according to the fraction solid. By conducting such a simulation that takes into consideration the supercooling, a highly accurate solidification analysis is relatively easily performed for various molten alloys.

Molten alloy solidification analyzing method and solidification analyzing program for performing the same

A mold includes: a base; and a contact surface which is provided on the base and which comes into contact with a molten material. The contact surface is provided with a first surface portion that includes a first fiber layer in which first carbon fibers are raised, and a second surface portion having different surface characteristics from the first surface portion.

Mold, solidified body, and methods of manufacture thereof

A die-casting die is provided. The die-casting die may include a cavity forming surface. A part of the cavity forming surface may be coated with a surface treatment layer. The surface treatment layer may include a mixture of fibrous carbon and particle carbon and have a thermal conductivity that increases in connection to an increase in an acted pressure.

Die-casting die and method for die-casting

Aluminum alloys and castings are provided that have excellent practical fatigue resistances. The alloy includes, based upon 100 mass %, 4-12 mass % of Si, less than 0.2 mass % of Cu, 0.1-0.5 mass % of Mg, 0.2-3.0 mass % of Ni, 0.1-0.7 mass % of Fe, 0.15-0.3 mass % of Ti, and the balance of aluminum (Al) and impurities. The alloy has a metallographic structure, which includes a matrix phase primarily of &#x3b1;-Al and a skeleton phase crystallizing around the matrix phase in a network shape. The matrix phase is strengthened by precipitates containing Mg. Because of the strengthened matrix phase, and the skeleton phase that surrounds it, the castings have high strength, high fatigue strength, and high thermo-mechanical fatigue resistance.

Aluminum alloys for casting and aluminum alloy castings

A heat-resistant magnesium alloy exhibiting excellent heat resistance and castability, which comprises 1.0 to 6.0 % by weight of zinc, 0.4 to 1.0 % by weight of zirconium, 1.5 to 5.0 % by weight of rare earth element, up to 0.3 % by weight of calcium, magnesium being as the balance, and unavoidable impurities.

Heat-resistant magnesium alloy

A method of preparing a composite aluminum material to be formed integrally by bonding aluminum or aluminum alloy to an aluminum or aluminum alloy member which is formed in advance in a specified shape by the method of internal chill, etc. The method comprises the steps of forming a chemical conversion coating of pentafluoroaluminate (K.sub.2 AlF.sub.5) by bringing a solution containing potassium ions and fluorine ions in contact with the surface of the aluminum member.

Method of preparing composite aluminum material

Growing community of inventors

Aichi-gun, Japan

Hiroaki Iwahori