GH4169铸锭中夹杂物的类型及分布规律

孔豪豪; 杨树峰; 曲敬龙; 杜金辉; 黄燕成

doi:10.7527/S1000-6893.2019.23306

航空学报 >

2020 , Vol. 41 >Issue 4: 423306 - 423306

DOI: https://doi.org/10.7527/S1000-6893.2019.23306

材料工程与机械制造

GH4169铸锭中夹杂物的类型及分布规律

孔豪豪 ,
杨树峰 ,
曲敬龙 ,
杜金辉 ,
黄燕成

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1. 北京科技大学冶金与生态工程学院, 北京 100083;
2. 高端金属特种熔炼与制备北京市重点实验室, 北京 100083;
3. 钢铁研究总院高温材料研究所, 北京 100081;
4. 北京钢研高纳科技股份有限公司, 北京 100081;
5. 攀钢集团江油长城特殊钢有限公司, 江油 621701

收稿日期: 2019-07-23

修回日期: 2019-11-04

网络出版日期: 2019-10-31

基金资助

国家自然科学基金（51874103，51734003）；四川省专项资金支持军民融合项目（部级项目）

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Type and distribution of inclusion in GH4169 nickel based superalloy

KONG Haohao ,
YANG Shufeng ,
QU Jinglong ,
DU Jinhui ,
HUANG Yancheng

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1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China;
3. High Temperature Materials Research Institute, Beijing Central Iron and Steel Research Institute, Beijing 100081, China;
4. Beijing CISRI-GAONA Materials&Technology Co. LTD, Beijing 100081, China;
5. Pangang Group Jiangyou Changcheng Special Steel Co., LTD, Jiangyou 621701, China

Received date: 2019-07-23

Revised date: 2019-11-04

Online published: 2019-10-31

Supported by

National Natural Science Foundation of China (51874103, 51734003); Civil-Military Integration Project Supported by Special Funds from Sichuan Province(Ministerial Project)

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摘要

高温合金中夹杂物是影响合金冶金质量和使用性能的主要因素。采用三联冶炼工艺对GH4169合金进行冶炼，并利用配有能谱仪的扫描电镜系统研究了VAR铸锭边缘及顶端区域夹杂物类型与分布的变化情况，为夹杂物的进一步控制提供参考。结果表明，在横向方向上，随试样所在位置远离铸锭边缘，夹杂物的平均尺寸由3.15 μm递减至2.58 μm，其数量密度由2 291 N/mm²（N代表夹杂物个数）降低至1 429 N/mm²；在纵向方向上，随试样所在位置远离铸锭顶端，夹杂物的平均尺寸由3.47 μm递减至2.84 μm，其数量密度由1 453 N/mm²降低至904 N/mm²，而合金中均包含5种类型的夹杂物，其类型与试样所在位置无关。最终，本实验初步判定φ508 mm的GH4169铸锭较为合适的车削量与切头量分别为30~40 mm和110~120 mm。

关键词： 高温合金; 真空自耗冶炼工艺; 夹杂物; 车削量; 切头量; 纯净度; 冶金质量

本文引用格式

孔豪豪 , 杨树峰 , 曲敬龙 , 杜金辉 , 黄燕成 . GH4169铸锭中夹杂物的类型及分布规律[J]. 航空学报, 2020 , 41(4) : 423306 -423306 . DOI: 10.7527/S1000-6893.2019.23306

Abstract

Inclusion is the main factor affecting the metallurgical quality and mechanical property of the Ni-based superalloys. In the present research, triple-melting techniques were used to refine the microstructure of GH4169 superalloy. Scanning Electron Microscopy (SEM) with an EDS were used to analyze the types and the distribution of inclusions in the edge and top region of the VAR ingot. The results showed that the average size and the amount of inclusions decreased from 3.15 μm to 2.58 μm and 2 291 N/mm² to 1 429 N/mm², as the sample was located away from the edge of the ingot. And the average size and the amount of inclusions decreased from 3.47 μm to 2.84 μm and 1 453 N/mm² to 904 N/mm², as the sampling locations moved away from the top of the ingot. Among the five main types of inclusions in the ingot, the rest of the types were independent of the sampling location. Finally, in this research, the amount of turning and cutting were tentatively determined to be 30-40 mm and 110-120 mm for the φ508 mm GH4169 VAR ingot.

Key words： superalloys; vacuum arc remelting technology; inclusions; turning amount; cutting amount; purity; metallurgical quality

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