摘要
本文应用原位钛合金化、细晶化的电解低钛铝基合金为母材生产汽车轮毂材料——A356合金,对其微观组织及性能进行了研究。研究发现:电解低钛A356合金较传统的熔配加钛A356合金组织细化,一次枝晶细小,二次枝晶臂间距短;经过T5短时处理,硅相球化良好,颗粒细小,强化元素Si、Mg在基体中均匀、弥散析出。电解低钛A356合金具有高强度和高韧性的良好力学性能匹配,σb≥300MPa和δ≥8%的性能比传统熔配加钛的A356合金强度和塑性均可提高20%以上。
The microstructure and mechanical properties of the in-situ Ti alloying of electrolytic low -titianium aluminium alloys applied in A356 alloy and automobile wheels were studied. It is found that the microstructure and the first dendrites refined and the second dendrites are shot. Solution 3h and aging 2h treatment is sufficient for the electrolytic low titianium A356 alloy to homogenize and achieve the silicon spheroidization, the strength element Si and Mg precipitated uniformly and dispersedly. The application of this heat treatment optimization results in outstanding tensile strength (up to 300MPa) at good elongation values (up to 8%). Compared with the traditional materials (T6 or T5 treatment), there is a significant improvement 20% in tensile and ductility.
出处
《热加工工艺》
CSCD
北大核心
2004年第11期31-34,共4页
Hot Working Technology
关键词
铝轮毂
电解低钛铝合金
A356
高强韧性
aluminium wheels
electrolytic low-titanium aluminium alloy
A356
high tensile strength and ductility
