Research on New Third Generation P/M Superalloy FGH100L
In this study,a new third-generation P/M superalloy FGH100L was prepared by spray forming(SF)+hot isostatic pressing(HIP)+isothermal forging(IF)+heat treatment(HT)process.To meet the requirements of third generation P/M disk superalloys,a systematic research was conducted on the composition design of new alloys,the selection of heat treatment process system and comprehensive mechanical properties.The results shows that:(1)JMatPro was used to calculate the equilibrium phases present in the FGH100L alloy are the matrix γ phase,γ phase,carbides(MC,M23C6),borides(M3B2,MB2)and trace amounts of TCP phase(μ phase,σ phase);(2)The microstructure and performance of the FGH100L alloy(SF+HIP+HT process)obtained under the differents solid solution+two-stage aging heat treatment.When the solution temperature is 1130℃,there are three types of γ phases in the alloy and the distribution is uniform.The tensile properties of FGH100L alloy at room/high temperature shows a parabolic trend as the solution heat treatment temperature increases,at 1130℃ the FGH100L alloy has the best properties;(3)The comprehensive mechanical properties of FGH100L alloy(SF+HIP+IF+HT process)were analyzed and compared with superalloy LSHR of US.At 705℃ the same conditions,the tensile strength and the elongation of FGH100L are 60-70MPa and 5.8%-7.5%higher than those of LSHR respectively.On the creep performance,compared with LSHR,FGH100L has a significant increase.In 705℃/897 Mpa conditions,creep fracture time of FGH100L is 1.43 times higher than that of LSHR alloy(85h vs 35h).In 705℃/793 Mpa conditions,creep rupture time of FGH100L alloy is 1.97 times higher than that of LSHR alloy(288h vs 146h).
spray forming third-generation P/M FGH100L superalloy heat treatment microstructure and mechanical properties of the HIP and IF process
Tian Tian Hao Zhibo Jia Chonglin Peng Shiqing Zhao Bo Cheng Jin Ge Changchun
Institute of Powder Metallurgy and Advanced Ceramics,School of Materials Science and Engineering,Uni Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institut School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij
国际会议
北京
英文
1168-1178
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）