Production of dispersion reinforced composite aluminum alloy

Abstract

Abstract PURPOSE:To improve alloy strength by charging granular dispersing materials of prescribed sizes and specific gravities under agitation into the melt of an aluminum alloy which is maintained in a molten state of molderately low viscosity, irradiating ultrasonic waves and casting and solidifying the melt quickly. CONSTITUTION:An aluminum alloy is heated to 680-800 deg.C and is kept in a molten state of molderately low viscosity. Particles of materials to be dispersed in the melt of the aluminum alloy, for example, Al2O3, ZrO2, SiO2, etc. which do not cause large settling or floating in the melt and have adequate sizes and specific gravities are charged into said melt at about 0.1-10vol% based on the volume of the melt. The settling or floating speed of the added materials is kept at <=1mu/sec. The melt is agitated mechanically, and after >=5min of irradiation of ultrasonic waves thereto, the melt is quickly cast in molds of a high cooling rate and is allowed to solidify. Thus the dispersing particles are dispersed easily, inexpensively and uniformly, and the dispersion reinforced composite aluminum alloy having improved hardness and strength is obtd.

Inventors

• 👤 Masamitsu Noguchi
• 👤 野口　政光
• 👤 Yutaka Goshima
• 👤 五島　豊
• 👤 Kazumi Tsuge
• 👤 柘植　一三

Bibliographic Details