| 摘要 |
Magnesium alloys containing: Y: 2.0-6.0% by weight Nd: 0-4.0% by weight Gd: 0-5.5% by weight Dy: 0-5.5% by weight Er: 0-5.5% by weight Zr: 0.05-1.0% by weight Zn+Mn: <0.11% by weight, optionally other rare earths and heavy rare earths, the balance being magnesium and incidental impurities and the total content of Gd, Dy and Er is in the range of 0.3-12% by weight, wherein either the alloy contains low amounts of Yb and Sm and exhibits a corrosion rate as measured according to ASTM B 117 of less than 30 Mpy, and/or the area percentage of any precipitated particles arising when the alloy is processed having an average particle size greater than 1 [mu]m and less than 15 [mu]m is less than 3%. |
| 主权项 |
1. A magnesium alloy suitable for use as a wrought alloy containing:
Y: 2.0-6.0% by weight Nd: 0.05-2.5% by weight Gd: 0 to <0.6% by weight Dy: 0 to <0.6% by weight Er: 0 to <0.6% by weight Zr: 0.05-1.0% by weight Zn+Mn: <0.11% by weight Yb: 0-0.02% by weight Sm: 0-0.04% by weight Al: <0.3% by weight Li: <0.2% by weight, each of Ce, La, Zn, Fe, Si, Cu, Ag and Cd individually: 0-0.06% by weight, Ni: 0-0.003% by weight, optionally rare earths and heavy rare earths other than Y, Nd, Gd, Dy, Er, Yb and Sm in a total amount of up to 0.5% by weight, the balance being magnesium and incidental impurities up to a total of 0.3% by weight, wherein the total content of Gd, Dy and Er is in the range of 0.3 to <0.6% by weight. |
