摘要
研究了Sr对原位Mg2Si/Al复合材料显微组织的影响,并利用等温热处理的方法成功地得到了半固态球状组织。其结果显示,Sr加入后能够改变初生Mg2Si的树枝晶形貌,随着Sr含量的增加,其形貌逐渐由多边形状变为块状,经过等温热处理后,初生Mg2Si相和α-Al相同时被球化,并简要地讨论了球化机理。
The effects of Sr content on the microstructure of in-situ Mg2Si/Al composites have been observed by XRD,SEM and extracted technology.And spherical semi-solid microstructure in the composites can be successfully achieved by isothermal heat treatment.The results show that with the increase of Sr content,primary Mg2Si particles are converted from dendritic phase into polygonal and then to quadrangle with grain size of about 40 μm.After isothermal heat treatment,both the primary Mg2Si particles and α-Al phase in the composites are spheroidized.The spheroidization mechanism has been approached briefly.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第3期235-237,共3页
Special Casting & Nonferrous Alloys
