摘要
研究了不同锰铁比[w(Mn)/w(Fe)=0、0.5、0.8、1.1和1.4]对高铁铝硅合金ZL102[w(Fe)=1.2%]中铁相形态和力学性能的影响。研究发现,合金组织中铁相呈粗大针状,添加Mn能将其变成汉字状,且随着锰铁比的增大,合金中的汉字状铁相逐渐增多,而针状铁相的数量则减少许多,尺寸变小。但是Mn不能完全抑制针状铁相的出现,而且锰铁比的提高,增加了合金组织中铁相的含量,导致合金力学性能降低。在本试验条件下,随着锰铁比的增加,试样的抗拉强度、伸长率均呈现先升后降的趋势。当w(Mn)/w(Fe)=1.1时,合金的抗拉强度和伸长率均达到最大值,分别为157.7MPa和1.22%。
Effects of different proportion between manganese and iron (w(Mn)/w(Fe)=0, 0.5, 0.8, 1.1 and 1.4) on the morphology of Fe phase and mechanical properties of ZL102 alloy with 1.2% Fe content were investigated. The results show that iron phase with coarse needle-like shape in the microstructure is observed, and it is converted into Chinese script with Mn addition. Furthermore, the Chinese script iron phase in the microstructure is increased and the needle-like iron phase is decreased and refined with raising Mn via Fe ratio. However, the mechanical properties of the alloy are deteriorated with the increase of Mn via Fe ratio as a result of increasing in Fe phase in the alloy. Meanwhile, both tensile strength and elongation of alloy exhibit the tendency of first rise then decrease with w(Mn)/w(Fe) ratio increasing. The optimized values of tensile strength and elongation, 157.7 MPa and 1.22%, respectively, can be obtained with w(Mn)/w(Fe) of 1.1.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2008年第8期594-596,共3页
Special Casting & Nonferrous Alloys
基金
武汉理工大学科研基金资助项目(2003XJJ011)
关键词
铝硅合金
锰铁比
铁相
SR
Al-Si Alloy, Mn via Fe Ratio, Iron Phase, Sr
