摘要
采用固液混合铸造研究了Al-10Mn、Al-15Mn和Al-20Mn合金的显微组织和力学性能.研究表明:固液混合铸造能有效地细化Al-Mn合金组织,其初生相尺寸可控制在10 μm以内,且形貌以球形或等轴状为主;合金的抗拉强度大大提高,由传统铸造的40～60 MPa提高到110～160 MPa,伸长率由零提高到1%左右;传统铸造和固液混合铸造的Al-Mn高合金的组织随着Mn含量的增加而更加粗大,抗拉强度则下降,硬度有所提高.采用固液混合铸造这一新型的材料制备技术,可以扩展Al-Mn等高合金材料的研究和应用的成分范围.
The microstructure and mechanical properties of the Al-10Mn,Al-15Mn and Al-20Mn alloys prepared by solid-liquid casting were researched.It is revealed that the microstructure of the Al-Mn alloy can be obviously refined by liquid-solid casting,in which the size of the primary phase with spheroidal or equiaxed shape is lower than 10 μm.Compared with that in conventional casting methods,the tensile strength of the Al-Mn alloy in solid-liquid casting is increased by 110～160 MPa from 40～60 MPa and elongation is increased by 1% from zero.The microstructure of the Al-Mn alloy in both conventional casting and solid-liquid casting become coarser with the increase of the Mn contents so the tensile strength was decreased and hardness is slightly increased.The solid-liquid casting can extend the composition scope of the Al-Mn alloy for research and application.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2005年第10期584-586,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50274037)
