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ZL201系Al-Cu-Mn系高强度耐热铸造铝合金。经T_5热处理后,抗拉强度可达45kg/mm~2;延伸率达10%以上,在160℃以下,其比强度超过中强度钢。是制造汽车,船舶、飞机及其它机械设备中受力构件的良好材料;但该合金流动性差,热裂敏感性强,故给铸造形状复杂的铸件造成极大困难。为了扬其长而避其短,我们根据热裂物理机制,在试验基础上,对影响热裂的主要因素:如铸温、模温,合金成份,熔炼工艺,模壳强度等方面进行分析研究,然后通过数值分析,建立热裂概率模型——Ps=20.18ln(T_1-T_2/T_2)E_h_(?)~(1/2)-19.32,旨在予测热裂倾向,优选工艺参数,防止铸件热裂。实践证明:这种方法具有较好的工程实用效果。
ZL201 Department of Al-Cu-Mn Department of high-strength heat-resistant cast aluminum. After T_5 heat treatment, the tensile strength of up to 45kg / mm ~ 2; elongation of 10% or more, below 160 ℃, the specific strength of more than medium strength steel. It is a good material for producing force components in automobiles, ships, aircrafts and other mechanical equipments. However, the alloy has poor fluidity and high thermal susceptibility, which makes it difficult to cast the complicated castings. In order to promote its long and avoid its short, according to the physical mechanism of thermal cracking, based on the test, the main factors affecting the thermal cracking: such as casting temperature, mold temperature, alloy composition, melting process, mold shell strength analysis Then, by numerical analysis, the thermal cracking probability model - Ps = 20.18ln (T_1-T_2 / T_2) E_h_ (?) ~ (1/2) -19.32 is established to predict the thermal cracking tendency, optimize the process parameters, Casting thermal cracking. Practice has proved that this method has good engineering practical results.