摘要
通过采用物理化学相分析方法对镍基变形FGH96高温合金涡轮盘盘心部分厚度方向上不同位置所取的样品进行分析,在不同的电解液和电解条件下进行电解提取出析出相,然后借助X射线衍射仪(XRD)、电感耦合等离子体原子发射光谱仪(ICP-AES)等手段对相及各相的元素含量进行分析,确定了合金的析出相类型、含量和组成结构式,并将其与各位置的高温蠕变性能差异进行比较和分析,得到涡轮盘厚度方向上微观相的信息并推测其对材料性能的影响,进而探讨指导对工艺生产的改进。研究结果表明:变形FGH96合金涡轮盘厚度方向上γ′相粒径和含量、碳化物和硼化物含量变化较大;在变形FGH96合金涡轮盘厚度方向上,各部位的γ′相质量分数都在30%左右。而且各个部位的γ′相含量存在波动,从目前测得的结果来看,质量分数最高和最低的地方相差约5.7%。各个位置处γ′相的含量和粒径,在涡轮盘厚度方向上越靠近中心处γ′相的粒径越大,但相应位置处的高温蠕变性能则呈现相反趋势;此外,在γ′相粒径最大的地方,γ′相的含量也呈现较大值。
The samples from different positions along thickness direction of the centre of turbine disk of nickel-based wrought FGH96 high temperature alloy were analyzed by physical and chemical phase analysis methods.The precipitated phases were extracted by electrolysis in different electrolytes under various conditions.The phases and elemental contents were analyzed using X-ray diffractometer(XRD)and inductively coupled plasmas atomic emission spectrometer(ICP-AES).The type,content and composition of precipitated phases were obtained,which were compared to the high temperature creep property at each position.The information of microscopic phases along thickness direction of turbine disk was obtained.Its influence on material properties was speculated and the guidance in improvement of production process was discussed.The results showed that the particle size and content ofγ′phase,the content of carbides and borides along thickness direction of turbine disk of wrought FGH96 alloy were quietly different.The mass fraction ofγ′phase in each position was about 30% along thickness direction of turbine disk of wrought FGH96 alloy.Moreover,the content ofγ′phase in each position had fluctuation.According to the measured results,the difference between highest and lowest mass fraction was about 5.7%.Along the thickness direction of turbine disk,the closer to center was,the larger the particle size ofγ′phase.However,the high temperature creep properties at corresponding position showed an opposite tendency.Furthermore,the content ofγ′phase was high for the position with largest particle size ofγ′phase.
出处
《冶金分析》
CAS
CSCD
北大核心
2018年第1期1-8,共8页
Metallurgical Analysis
基金
北京市科技计划(D161100002416002)
国家重点研发计划材料基因工程关键技术与支撑平台(2016YFB0701401)
关键词
镍基变形FGH96合金
涡轮盘
析出相
定量分析
高温蠕变性能
nickel-base wrought superalloy
turbine disk
precipitated phase
quantitative analysis
high temperature creep property
