Si-containing magnesium alloy for casting with melt thereof

Details Si-containing magnesium alloy for casting with melt thereof Si-containing magnesium alloy for casting with melt thereof

1996-05-21

1997-09-23

Czaja, Donald E.

Metal treatment

Stock

Magnesium base

420408, 420409, C22C 2302, C22C 2304

Patent

active

056699905

ABSTRACT:
A--Si containing magnesium alloy for casting with a melt thereof with a cast structure having eutectic compounds of Mg.sub.2 Si produced to improve creep strength of a cast product, preferably a Si-containing magnesium alloy of a Mg--Al--Zn system having either 0.01% to 2.0% or 6 to 12% of Zn and 6 to 12% of Al, is disclosed with the improvement in that the alloy contains 0.3 to 1.5% by weight of Si in combination with 0.005 to 0.2% of Sr added to effect refinement of the eutectic compounds to thereby reduce hot cracking and improve mechanical properties of the cast product, while the improved creep strength is preserved.

REFERENCES:
patent: 5147603 (1992-09-01), Nussbaum et al.
patent: 5153564 (1992-10-01), Gruzleski et al.
C.A. Aliravci, et al., "Effect of Strontium on the Shrinkage Microporosity in Magnesium Sand Castings," 96th AFS Casting Congress, Milwaukee, Wisconsin, May 3-7, 1992, pp. 3-20, FIGS. 1-30 and Tables 1-5.
G. Nussbaum, et al., "New Mg-Al Based Alloys with Improved Casting and Corrosion Properties", Magnesium Alloys and Their Applictions, B.L. Mordike, et al. (Eds.), (1992) pp. 351-358.
G.S. Foerster, et al., "Investigation Regarding Magnesium Die Cast," Die Casting Engineer, vol. 1-2 (1977),pp. 4-11.
H. Ishimaru, et al., "Properties of Mg-Al-Zn Ternary Cast Alloys," The 58th Spring Congress of Light Metal Academy, Japan, 1980,pp. 393-400.

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