摘要
采用机械振动辅助浇注法制备了数控机床散热柜用新型Mg-Al-Zn-Ce-Sc镁合金,并进行了化学成分、显微组织、XRD、DSC、导热性能和抗热疲劳性能的测试与分析。结果表明,采用机械振动辅助浇注能够使Mg-Al-Zn-Ce-Sc镁合金的组织细小、导热性能和抗热疲劳性能较好。合金主要由α-Mg基体相和少量的Mg17Al12相、Al13Ce3相组成。与商用AZ31镁合金相比,机械振动辅助浇注制备的新型镁合金50℃时的热导率增加27.63%、200℃时的热导率增加64.29%。
The new-type Mg-Al-Zn-Ce-Sc magnesium alloy for machine heat radiating cabinet was prepared by the method of mechanical vibration-assisted pouring. And the chemical composition, microstructure, XRD, DSC, heat conductivity property and thermal fatigue resistance were tested and analyzed. The results show that mechanical vibration-assisted pouring can make the Mg-Al-Zn-Ce-Sc magnesium alloy obtain fine microstructure, good heat conductivity property and thermal fatigue resistance. The alloy is mainly composed of α-Mg phase and a small amount of Mg17Al12 phase and Al13Ce3 phase. Compared with commercial AZ31 magnesium alloy, the heat conductivity at the of new-type alloy temperature of 50℃ and 200℃ increase by 27.63% and 64.29%, respectively.
出处
《热加工工艺》
CSCD
北大核心
2015年第13期76-78,共3页
Hot Working Technology
基金
重庆市自然科学基金项目资助(cstc2012jj A0004)
