【作者】 吴凯； 刘国权； 胡本芙； 张义文； 陶宇； 刘建涛；

【Author】 WU Kai~1,LIU Guo-quan~(1,2),HU Ben-fu~1,ZHANG Yi-wen~3,TAO Yu~4,LIU Jian-tao~4 (1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China.2. State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083, China.3.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China.4.High Temperature Materials Research Institution,CISRI,Beijing 100081,China.)

【机构】 北京科技大学材料科学与工程学院； 北京科技大学新金属材料国家重点实验室； 北京科技大学冶金与生态工程学院； 钢铁研究总院高温材料研究所；

【摘要】 对新型镍基粉末高温合金FGH98Ⅰ涡轮盘双重组织热处理进行了实验与模拟研究。结果表明:晶界γ′相是控制合金晶粒长大的关键因素,在高于γ′相固溶温度时,晶粒尺寸随温度升高而快速长大,并建立了FGH98Ⅰ合金晶粒尺寸与固溶温度、保温时间之间的动力学函数关系式。另外,涡轮盘温度场的有限元模拟表明温度梯度主要取决于保温时间。在结合实验与有限元模拟结果所优化选择的热处理条件下,成功获得轮缘为ASTM 6～7和轮心为ASTM 10～11的双重组织涡轮盘。更多还原

【Abstract】 The experimental and simulation on grain growth of a new type nickel-based superalloy tubrine disk subjected to dual microstructure heat treatment were studied.The results show that grain boudaryγ’ phases are the key factor to controll grain growth.The grain sizes of alloy FGH98Ⅰincrease significantly when the solution temperatures are aboveγ’ slovus temperature.The grain size as a kinetic function of solution temperature and holding time is also established.In addition,FEM simulation on the temperature field of turbine disk indicates that the temperature gradient is mainly determinated by holding time.Under a suitable treating condition obtained by the combination of experimental and FEM simulation results,the grain grade in the bore region of FGH98Ⅰturbine disk reached 10-11,while in the rim region reached 6-7.更多还原