铸造工艺参数对高温合金法兰晶粒度影响

摘要

For controlling pouring temperature and temperature of mould reasonably by using new casting technology, the effect of casting technology parameter on grain size of superalloy flange is explored. The results show that grain size of flange casting made in new casting technology stays ASTM4-ASTM6.5 when pouring temperature, casting rate, temperature of mould is 1335~1345 ℃, 18~25kg/s and 1080~1150 ℃respectively. At the same time, equal-axis fine crystal-grain is distributed evenly over whole cut off casting.%采用新型细晶铸造技术，通过合理控制浇注温度和模壳预热温度，研究了铸造工艺对K4202高温合金法兰晶粒度的影响。结果表明，浇注温度1335～1345℃，浇注速度18～25kg/s，模壳预热温度1080～1150℃时，新型细晶铸造技术制备的法兰铸件的微观晶粒度在ASTM4-ASTM6.5级，实现了全截面均匀细等轴晶。