| 大尺寸GH4742合金铸锭夹杂物及析出相分布特征 |
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| 引用本文： | 田强,杨曙磊,秦鹤勇,杨树峰,王宁,郝永洲.大尺寸GH4742合金铸锭夹杂物及析出相分布特征[J].中国冶金,2022,32(2):52-59. |
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| 作者姓名： | 田强 杨曙磊 秦鹤勇 杨树峰 王宁 郝永洲 |
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| 作者单位： | 1. 钢铁研究总院高温材料研究所, 北京 100081;
2. 北京科技大学冶金与生态工程学院, 北京 100083 |
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| 基金项目： | 国家科技重大专项资助项目(2017-VI-0018-0090);国家自然科学基金资助项目(51874103,51974020) |
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| 摘 要： | 为明确大尺寸GH4742合金铸态组织中析出相和夹杂物的分布特征,采用扫描电子显微镜、金相分析及电解腐蚀等方法,分析了φ660 mm锭型GH4742合金中夹杂物和析出相的组成、形貌及数量.结果 显示,合金铸锭中的夹杂物主要有SiO2、CaO、Al2O3-SiO2、CaO-SiO2及碳氮化物.合金中夹杂物数量密度为14.7...
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| 关 键 词： | GH4742合金 电解腐蚀 夹杂物 团簇 析出相 |
Characteristics of inclusions and precipitation phase distribution in large size GH4742 superalloy ingot |
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| TIAN Qiang,YANG Shu-lei,QIN He-yong,YANG Shu-feng,WANG Ning,HAO Yong-zhou.Characteristics of inclusions and precipitation phase distribution in large size GH4742 superalloy ingot[J].China Metallurgy,2022,32(2):52-59. |
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| Authors: | TIAN Qiang YANG Shu-lei QIN He-yong YANG Shu-feng WANG Ning HAO Yong-zhou |
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| Affiliation: | 1. Department of High-Temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | In order to clarify the distribution characteristics of precipitated phases and inclusions in the ingot organization of large size GH4742 alloy, the composition, morphology and quantity of inclusions and precipitated phases in 660 mm ingots of GH4742 alloy were analyzed by electron scanning microscopy, metallographic analysis and electrolytic corrosion. The results showed that the inclusions in alloy ingot mainly consisted of SiO2, CaO, Al2O3-SiO2, CaO-SiO2 and carbonitrides. The number of inclusions in alloy ranged from 14.7 to 85.8 inclusions/mm2, and inclusions were present in clusters at a radius of 1/4 from the center of ingot. A large number of γ′ phase, (γ+γ′) eutectic phase, δ phase, μ phase, Laves phase, carbide phase and boride phase were distributed in the alloy ingot, and their distribution and morphology were significantly different between dendrites and dendrites as well as in the center and edges of ingot. |
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| Keywords: | GH4742 superalloy electrolytic corrosion inclusion cluster precipitated phase |
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