摘要
介绍了采用无余量整体精密铸造技术来研制生产K4537合金燃气轮机涡轮叶轮的过程,并对该铸件的铸造工艺进行了系统的研究。结果表明,通过熔模快速成型技术来制造熔模,大大缩短了精铸件的研制周期,降低了生产成本;采用带球形浇冒口的浇注系统,浇注时使用合适的浇注温度和型壳温度,可以有效的降低轴部的疏松缺陷;在薄壁叶片部位覆盖一层保温棉,可以确保薄壁叶片的充型。并浇注出冶金质量优良的铸件,满足了设计和使用的要求。
Production of K4537 superalloy gas turbine impeller by investment casting was described, and investment casting process was investigated systematically. The results show that it reduces the development time and production cost by rapid prototyping technology to produce mold shell. Porosities in the turboshaft can be effectively eliminated by adopting spherical running and feeding system and using suitable pouring and mold temperature. Filling of thin-walled blade can be ensured effectively by covering a layer of insulation blanket on blade. The gas turbine impeller with desirable metallurgical quality was successfully produced by adopting those methods, meeting the requirements of the design and use.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第4期354-356,共3页
Special Casting & Nonferrous Alloys
