MAGNESIUM ALLOY SHEET MATERIAL IMPROVED IN COLD FORMABILITY AND STRENGTH, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide: a magnesium alloy sheet material having cold formability equal to that of an aluminum alloy and exhibiting excellent strength; a method for producing the magnesium alloy sheet material; and a member of the magnesium alloy sheet material.;SOLUTION: This easily formable magnesium alloy sheet material having an Erichsen value of 7.0 or more and an yield stress in a TD direction of 90 MPa or more is produced by rolling an alloy at a sample surface temperature of 150°C to 450°C or below and then annealing the alloy. In the alloy, an additive amount of Zn is restricted in 2.61-6.20 mass%, 0.01-0.9 mass% of Ca is added or Ca and Sr are added so that the total amount of Ca and Sr is 0.01-1.5 mass% while a Ca concentration is restricted in 0.01-0.9 mass%, and, if required, 0.01-0.7 mass% of Zr and/or Mn is added. The member of the easily formable magnesium alloy sheet material is also produced. Thus, an inexpensive magnesium alloy can be positively applied to the press molding of home electric appliances, such as a digital camera, a notebook personal computer and a PDA.;COPYRIGHT: (C)2012,JPO&INPIT