试棒铸造工艺对K480铸造高温合金力学性能的影响

Effects of Test Bar Casting Process on Mechanical Properties of Casting Superalloy K480

通过对试棒浇注温度、模壳温度的调整,研究了5种不同试棒铸造工艺对K480铸造高温合金的870℃拉伸性能和980℃/193 MPa持久性能的影响。结果表明:试棒浇注温度和模壳温度对K480合金力学性能影响较大。当浇注温度为1450℃、模壳温度为900℃时,合金870℃抗拉强度和980℃/193 MPa持久寿命最大,但其870℃伸长率最小。当浇注温度为1400℃、模壳温度为950℃时,合金870℃抗拉强度和980℃/193 MPa持久寿命最低,但其870℃伸长率最高,但都能满足技术要求。

The effects of five different casting processes on the tensile properties at 870℃ and rupture properties at 980℃/193 MPa for the cast superalloy K480 were investigated by adjusting the pouring temperature and mold shell temperature of the test bar. The results show that the pouring temperature and mold shell temperature have obvious effects on the mechanical properties of K480 alloy. When the pouring temperature and the mold shell temperature are 1450℃ and 900℃ respectively,the tensile strength at 870℃ and rupture life at 980℃/193 MPa are the maximum, but the elongation at 870℃ is the minimum.When the pouring temperature is 1400℃ and the mold shell temperature is 950℃, the tensile strength at 870℃ and rupture life at 980℃/193 MPa are the lowest, but the elongation at 870℃ is the highest, but they all can meet technical requirements.