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在多组元的镍基高温合金中分别和同时加入高Cr和高Ru,经固溶处理后,在800～1100℃下进行10～1300h时效处理,观察组织并分析Ru、Cr以及二者交互作用对合金组织稳定性的影响.结果表明:在无Cr和Ru的合金中,经过1000℃/1300h时效处理后无TCP相析出;加入高Cr的合金仅20h就在晶界发现了TCP相,50h后在枝晶干出现TCP相;在1000℃时效,TCP相比其他温度更易析出.在同时加Cr和Ru的合金中,经过1000℃/1000h时效后并未发现TCP相的析出.这说明高含量的Cr促进了TCP相的形成,而高Ru的添加在高Cr合金中也能有效地抑制TCP相的析出,提高组织稳定性.
High-Cr and high-Ru were added to the multi-component nickel-base superalloy separately and simultaneously. After solution treatment, aging treatment was performed at 800 ~ 1100 ℃ for 10 ~ 1300h. The microstructures were observed and analyzed for Ru and Cr The results show that in the alloy without Cr and Ru, no TCP phase is precipitated after aging at 1000 ℃ for 1300h, and the TCP phase is found in the grain boundary only after adding alloy with high Cr for 20h, After 50h, the TCP phase appeared on the dendrites and the TCP was precipitated more easily than other temperatures at 1000 ℃ .There was no precipitation of TCP phase after 1000 ℃ / 1000h aging in the alloys containing Cr and Ru The high content of Cr promotes the formation of TCP phase, while the addition of high Ru also effectively inhibits the precipitation of TCP phase and improves the stability of the high Cr alloy.