MAGNESIUM ALLOYS WITH HIGH-MECANICAL RESISTANCE AND PROCESS FOR OBTAINING THEM BY RAPID SOLIDIFICATION

摘要

PCT No. PCT/FR89/00071 Sec. 371 Date Oct. 25, 1989 Sec. 102(e) Date Oct. 25, 1989 PCT Filed Feb. 23, 1989 PCT Pub. No. WO89/08154 PCT Pub. Date Sep. 8, 1989.Magnesium alloy having a breaking load of at least 290 MPa, more particularly at least 330 MPa, having the following composition by weight: Al 2-11%, Zn 0-12%, Mn 0-0.6%, Ca 0-7%, but with the presence of at least Zn and/or Ca, having a mean particle size less than 3 mu m, a homogeneous matrix reinforced with intermetallic compounds having a size less than 1 mu m precipitated at the grain boundaries, this structure remaining unchanged after storage at 200 DEG C. for 24 hours; and a process for producing it by rapid solidification and consolidation by extrusion at a temperature between 200 DEG and 350 DEG C.