CAJ | 학술논문

采用高强超声熔体处理法制备Mg-Zn-Er合金,研究了导入超声时熔体温度对合金铸态显微组织和性能的影响.结果表明,在超声处理时间和超声输出功率分别为100 s和600 W时,随着导入超声时熔体温度的提高,合金的铸态显微组织由粗大的枝晶转变为细小均匀圆整的晶粒,并得到最佳的导入超声熔体温度为718 ℃.在此温度下导入超声时,制得的Mg-5Zn-2Er合金晶粒最细小圆整、粒径分布最均匀,其室温抗拉强度和伸长率都达到最大值,分别为199.6 MPa和11.6%,而合金的高温抗拉强度则为最小值.
채용고강초성용체처리법제비Mg-Zn-Er합금,연구료도입초성시용체온도대합금주태현미조직화성능적영향.결과표명,재초성처리시간화초성수출공솔분별위100 s화600 W시,수착도입초성시용체온도적제고,합금적주태현미조직유조대적지정전변위세소균균원정적정립,병득도최가적도입초성용체온도위718 ℃.재차온도하도입초성시,제득적Mg-5Zn-2Er합금정립최세소원정、립경분포최균균,기실온항랍강도화신장솔도체도최대치,분별위199.6 MPa화11.6%,이합금적고온항랍강도칙위최소치.
Effects of introducing ultrasonic temperature on microstructure and properties of Mg-Zn-Er alloy prepared by high intensity ultrasonic melt treatment were analyzed. The results indicate that as-cast microstructure of the alloy is converted from coarse dendrite into uniformly distributed fine spheroidized grain with increasing in introducing ultrasonic temperature in condition of ultrasonic time for 100 s and ultrasonic power of 600W, in which an optimized temperature is 718℃. The grain with desirable size and uniform distribution and roundness in Mg-5Zn-2Er alloy treated by ultrasonic at 718℃ can be observed, and tensile strength and elongation reach 199.6MPa and 11.6% at room temperature, respectively, exhibiting the maximum value, while tensile strength exhibits the minimum values at high temperature.