摘要
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-x Sb alloys were prepared. The alloy samples were hot extruded and some of the hot-extruded alloys were aged（T5）. The effects of Sm and Sb on the microstructure and properties the AZ61 alloys were investigated by XRD, OM, SEM, TEM and so on. Results show that the main phases of AZ61-1Sm-x Sb alloys are β-Mg_（17）Al_（12）, Al_2Sm, Al_3Sm and Sb Sm. Compared with AZ61 alloy, the Mg_（17）Al_（12） in AZ61-1Sm alloy is distributed discontinuously as nets. However, the discontinuous distribution of Mg_（17）Al_（12） is more obvious in AZ61-1Sm-x Sb alloys and acicular Sb Sm phase appears. When the content of Sb is 1.5 wt%, bulky Sm Sb occurs while β-Mg_（17）Al_（12）, Al2 Sm and Al3 Sm are dispersed as particles. Addition of Sm and Sb can increase the mechanical properties of hot-extruded and T5 AZ61 alloys. Moreover, adding Sb into AZ61-1Sm alloy can enhance its strength at 150 °C obviously.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第6期1488-1494,共7页
Rare Metal Materials and Engineering
基金
重庆市科技计划(CSTC2013jcyjC60001)
