摘要
采用原位统计分布分析表征技术系统研究了GH169高温合金压气机盘纵断面不同部位铌分布的规律。以所得到的与样品原位置相对应的数以万计原始信号系统解析为基础,进而获得压气机盘锻件的纵断面不同部位铌的定量统计分布信息以及加工工艺过程中铌的迁移规律。准确计算判定了盘纵断面不同部位铌的最大偏析度,提出了95%置信度时中位值置信扩展率,即统计偏析度(S)新参数,用以表征铌在压气机盘中分布的均匀度;提出了所有数据在特定含量区间(C0±R)的频度(权重)比率,即统计符合度(F)新参数,用以表征预设质量控制区间铌含量的一致性的概率。采用原位统计分布分析的表征方法,准确定量地评定了高温合金压气机盘件纵断面不同部位铌的分布均匀度和符合度,为加工后盘件的质量控制评估提供了参考。
The distribution of niobium on the vertical section of casting of GH169 superalloy pneumatic plate wheel was studied by original position statistic distribution analysis technique in the present paper.On the basis of analysis to ten thousands of primary signals at the corresponding original positions of the sample systematically,the quantitative statistic distribution information was obtained.The biggest segregation degrees of niobium in different areas of pneumatic plate wheel vertical section were calculated accurately.Two new models — the total weight ratio of niobium contents within the permissive content range（C0±R） and the confidence extension ratio of median value（K） at 95 % of confidence limit of weight ratio,were also presented.All these above methods have been used to determine the homogeneity and statistic fitting degree of niobium in the vertical section of casting of GH169 superalloy pneumatic plate wheel accurately for quality control.
出处
《中国工程科学》
2011年第10期19-27,共9页
Strategic Study of CAE
关键词
原位统计分布分析表征技术
高温合金压气机盘
铌
统计偏析度
统计符合度
质量控制
original position statistic distribution analysis
superalloy pneumatic plate wheel
niobium
statistic segregation degree
statistic fitting degree
quality control
