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研究了铸态AZ61-1Sm-xSb合金,并对其进行了热挤压和时效处理(T5)。结果表明,AZ61-1Sm-xSb合金的主要合金相为β-Mg_(17)Al_(12)、Al2Sm、Al3Sm及Sb Sm。与AZ61相比,AZ61-1Sm中的Mg_(17)Al_(12)相呈现不连续网状分布的特征;而在AZ61-1Sm中添加Sb,Mg_(17)Al_(12)不连续分布特征更趋明显,并出现针状SbSm相;当Sb添加量为1.5%(质量分数)时,大块状Sb Sm相出现,而β-Mg_(17)Al_(12)、Al2Sm、Al3Sm均为颗粒状并呈弥散分布。Sm和Sb的添加能提高AZ61合金挤压和时效态力学性能,在AZ61-1Sm合金中添加Sb元素能显著提高合金的高温强度。
The as-cast AZ61-1Sm-xSb alloy was investigated and hot-pressed and aged (T5). The results show that the main alloy phases of AZ61-1Sm-xSb alloy are β-Mg 17 Al 12, Al 2 Sm, Al 3 Sm and Sb Sm. Compared with AZ61, the Mg_ (17) Al_ (12) phase in AZ61-1Sm exhibits discontinuous reticular distribution, while Sb and Mg_ (17) Al_ (12) discontinuities in AZ61-1Sm are more And SbSm phase appears obviously. When Sb content is 1.5% (mass fraction), bulk Sb Sm phase appears, while β-Mg 17 Al 12, Al 2 Sm and Al 3 Sm are all granular And was diffusely distributed. The addition of Sm and Sb can improve the mechanical properties of AZ61 alloy during extrusion and aging, and the addition of Sb in AZ61-1Sm alloy can significantly improve the high temperature strength of AZ61 alloy.