摘要
采用Mg-8Zn-3.2Al-0.3Mn-0.7Si-0.06AlP系镁合金,压铸了油锯导板压盖,分析研究了其组织和性能。结果表明,压铸态下合金的组织较重力铸造下明显细化,力学性能及显微硬度均得到了明显的提高;变质剂AlP的加入使得合金组织显著细化,力学性能也得到提高;合金在重力铸造及压铸下的断裂机制均为混合断裂;重力铸造下合金中Si以Mg2Si形式存在,而压铸下Si以Mg2Si相和固溶态两种形式存在。
Microstructure and mechanical properties of die casting Mg-8Zn-3.2Al-0.3Mn-0.7Si-0.06AlP alloy chain saw guide-plate cover in die castings were expounded. The results show that compared with those in gravity casting, the microstructure of the cover in die casting is evidently refined, and tensile strength and elongation is greatly improved. The microstructure of the cover with the improvement of mechanical properties can be greatly refined with AlP modifier addition. The rupture mechanism of the vover both in gravity casting and in die casting is characterized by mixed crack. In addition, the element Si exists as Mg2Si phase in gravity casting while it exists as Mg2Si phase and α-Mg solid solution in die casting.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2008年第8期615-617,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50571092)
河南省科技成果转化资助项目(072201230002)
河南省教育厅自然科学研究计划项目(2008B430025)
郑州大学创新人才基金资助项目(000000307032)
关键词
镁合金
压铸
油锯
显微组织
性能
Magnesium Alloy, Die Casting, Chain Saw, Microstructure, Mechanical Properties
