摘要
利用坩埚电阻炉熔炼制备了不同锆含量的Mg-1Ca-xZr合金(x=0、0.3、0.6,质量分数/%),并在350℃温度挤压成板材.结合显微组织分析、拉伸性能测试研究了锆含量对铸态、挤压态Mg-1Ca-xZr合金组织和性能的影响。结果表明:随着锆含量的增加,合金铸态组织逐渐细化,强度.塑性提高。挤压后的Mg-1Ca-0.6Zr合金由于发生动态再结晶,晶粒显著细化。与铸态合金相比,挤压态合金的强度显著提高。随着加载速率的提高,垂直挤压方向拉伸时,合金的强度提高、塑性下降,而平行挤压方向拉伸时,合金的强度塑性均提高。
Mg-1 Ca-xZr alloy(x=0,0.3,0.6 wt/%) was prepared via smelting in a resistance furnace. A thermomechanical treatment approach was adopted to the as-received alloy and it was extruded to plates at 350 ℃. The as-cast and extruded alloy with different Zr contents was studied by optical microscope and tensile testing machine for researching the effect of Zr contents on the alloy structure and properties. The result indicates that with the increase of Zr content, the as-cast alloy has more refined grains, higher strength and plasticity;the as-extruded Mg-1 Ca-0.6 Zr alloy can has remarkably refined grains due to dynamic recrystallization occurrence. The strength of the as-extruded alloy is much higher than that of the as-cast alloy. As loading rate increases, strength increases and plasticity decreases when stretching direction is vertical to extrusion direction;both strength and plasticity increase when the stretching direction is parallel.
作者
黄俊全
沙桂英
刘腾
董庚益
马仁君
HUANG Jun-quan;SHA Gui-ying;LIU Teng;DONG Geng-yi;MA Ren-jun(School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110136,China)
出处
《轻合金加工技术》
CAS
2021年第12期34-37,共4页
Light Alloy Fabrication Technology
