Type and distribution of inclusion in GH4169 nickel based superalloy

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

doi:10.7527/S1000-6893.2019.23306

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

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

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

Material Engineering and Mechanical Manufacturing

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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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

Cite this article

KONG Haohao , YANG Shufeng , QU Jinglong , DU Jinhui , HUANG Yancheng . Type and distribution of inclusion in GH4169 nickel based superalloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020 , 41(4) : 423306 -423306 . DOI: 10.7527/S1000-6893.2019.23306

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