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航空工业部于10月在江西庐山召开了ZL205高强度铸造合金鉴定会,共有20个单位的55名代表参加了会议。由北京航空材料研究所研制的ZL205合金是当前工业中应用的强度最高的铸造铝合金。该合金在T_5热处理状态(淬火加不完全人工时效)下,抗拉强度σb不小于45.0kg/mm~2,延伸率δ_5不小于7.0％;在T_6热处理状态(淬火加完全人工时效)下,抗拉强度σb不小于50.0kg/mm~2,延伸率δ_5不小于3.0％。 该合金的试验和生产验证表明:ZL205合金在砂型铸造中,铸造性能及冶金质量良好,
Aviation Industry Department held a ZL205 high-strength casting alloy identification meeting in Lushan, Jiangxi Province in October. A total of 55 representatives from 20 units attended the meeting. ZL205 alloy developed by Beijing Aeronautical Materials Research Institute is the highest strength cast aluminum alloy used in the current industry. Under the condition of T5 heat treatment (quenching plus incomplete artificial aging), the tensile strength σb is not less than 45.0kg / mm ~ 2 and the elongation δ_5 is not less than 7.0%. Under T_6 heat treatment (quenching plus complete artificial aging) The tensile strength σb is not less than 50.0 kg / mm 2, and the elongation δ_5 is not less than 3.0%. The alloy test and production verification showed that: ZL205 alloy in sand casting, casting performance and metallurgical quality is good,