铝合金翼片以铸代铣的制造工艺

Manufacturing Process by Casting Instead of Milling for Aluminum Alloy Tail Blades

以25wt％LY12和75wt％LF21废料为基本原料，加入一定量的合金（质量分数（％），2．6～3．8Cu；1．0～1．2Mg；0．7～O．9Mn；3．5～4．2Zn；0．20Cd；0．13～0．18Ce稀土），熔炼过程用工业六氯乙烷C2C16、Al—Re中间合金及铝钛中间合金对其进行二次精炼与变质处理，采用金属模底浇成型。铸件毛坯经淬火和时效处理后，抗拉强度σb≥370MPa，伸长率δ10≥4％，硬度≥90HRB。铝合金翼片铸件替代了原来铣削工艺生产的零件，满足了产品的使用性能要求，节约了材料和加工费用，具有良好的经济效益。

Taking the 25wt%LY12 and 75wt%LF21 scrap as the basic raw material, adding a certain amount of alloy （wt%, 2.6-3.8Cu; 1.0-1.2Mg; 0.7-0.9Mn; 3.5-4.2Zn; 0.20Cd;Rare earth： 0.13-0.18Ce）, the secondary refining and modification were performed by using industrial hexachloroethane C2C16, AI-Re intermediate alloy, aluminum and titanium intermediate alloy in smelting process, and the castings were shaped by metal mould bottom casting. After the quenching and aging treatment, the tensile strength of the casting blank is not less than 370 MPa, the elongation is not less than 4%, and the hardness is not less than 90 HRB. The aluminum alloy tail blades castings replaced the parts produced by original milling process, which meets the use of performance requirements for the products, saves the costs for materials and processing, and has good economic efficiency.