摘要
应用热力学计算软件JMatPro,研究了新型镍基高温合金718Plus化学成分对主要析出相的影响规律。结果表明:718Plus合金中δ相的回溶温度比718合金低,γ'相的回溶温度比718合金高。在合金凝固过程中,Nb、Mo和Ti元素在枝晶间偏析较严重。Mo、Cr和Ti含量的增加可显著降低合金熔点,Nb含量的增加可显著增加718Plus合金δ相的析出量,并提高δ相的回溶温度。Al、Ti含量的增加可增加718Plus合金γ'相析出量,并提高γ'相回溶温度,Al/Ti增加可显著降低γ/γ'相的错配度。
The effects of composition on the precipitation phases in a novel nickel-based superalloy 718Plus were studied using JMatPro.The results show that the solution temperature ofδphase of alloy 718Plus is lower andγ'phase is higher compared with alloy 718.Interdendritic segregation of Nb,Mo and Ti is severe during the solidification.The increasing of Mo,Cr and Ti content is responsible for the significantly reduction of melting point.The increasing of Nb content leads to higher amount and higher solves temperature ofδphase.The increase of Al and Ti content leads to higher amount and higher solves temperature ofγ'phase.γ/γ'mismatch decreases dramatically with the increase of Al/Ti.
作者
白明远
李钊
张勇
BAI Mingyuan;LI Zhao;ZHANG Yong(Beijing Institute of Aeronautical Materials,AECC,Beijing 100095,China)
出处
《热加工工艺》
北大核心
2022年第8期59-63,共5页
Hot Working Technology
