航空发动机的涡轮外环用Rene77镍基沉淀硬化型等轴晶铸造高温合金热处理--午虎特种合金研究部 Rene77 Rene77是镍基沉淀硬化型等轴晶铸造高温合金，使用温度在900℃以下。合金中加入铬、钴、钼、铝、钛和铌元素，进行固溶和沉淀强化，使合金具有较好的综合性能。合金具有较高的强度和塑性、组织稳定，并具有较好的铸造性能。适于制作航空发动机的燃气涡轮叶片和涡轮外环等高温零件。 应用概况及特性 合金已用于制作航空发动机的涡轮外环，批产和使用情况良好。 合金在850℃—950℃长期时效后，未发现TCP相析出。 化学成分 元素 Cr Ni Co Mo Al Ti Fe 质量分数/% 14.0—15.25 余 14.00—16.00 3.90—4.50 4.00—4.60 3.00—3.70 ≤0.50 元素 Zr Ce Mn Si S P 质量分数/% ≤0.040 ≤0.100 ≤0.15 ≤0.20 ≤0.015 ≤0.015 元素 Sb Ag Sn As Pb Bi 质量分数/% ≤0.001 ≤0.0005 ≤0.001 ≤0.001 ≤0.0005 ≤0.00005 The turbine outer ring of aero-engine is used for the heat treatment of high temperature alloy by the reagent of Rene77 nickel base precipitation hardening type. Rene77 Rene77 is isometric nickel-based precipitation hardening type casting high temperature alloy, using temperature below 900 ℃. Chromium, cobalt, molybdenum, aluminum, titanium and niobium are added to the alloy to strengthen the solid solution and precipitation, so that the alloy has better comprehensive performance. The alloy has high strength and plasticity, stable structure and good casting performance. High temperature components suitable for making aero-engine gas turbine blades and turbine outer rings. Application overview and features. The alloy has been used to make the turbine outer ring of the aero engine, and the batch production and use are in good condition. Alloy at 850 ℃, 950 ℃ after aging for a long time, haven't found the TCP phase precipitation. Chemical composition Element C Cr Ni Co Mo Al Ti Fe. Quality score/more than 0.09-0.09-15.25 0.05 14.00 16.00 3.90 4.50 4.00 4.60 3.00 3.70 0.50 or less Element B Zr Ce Mn Si S P. Quality score / % 0.012-0.020, 0.040, 0.100, 0.15, 0.20 or less or less or less or less acuities were 0.015, 0.015 or less Element Cu Sb Ag Sn As Pb Bi. Quality score / % acuities were 0.100, 0.001, 0.0005, 0.001, 0.001 or less or less or less or less acuities were 0.0005, 0.00005 or less
