GH4169电渣重熔铸锭表层夹杂物分布规律

doi:10.13228/j.boyuan.issn0449-749x.20200270

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Abstract Electroslag remelting is the middle link of the "triple" smelting process of the GH4169 superalloy. The surface quality of electroslag ingot is of great significance to improve the purity of consumable ingot. The surface quality can be improved by using an appropriate turning amount. Scanning electron microscopy with energy-dispersive spectroscopy,Image Pro Plus software,and JMatPro software were used to systematically explore the distribution of inclusions on the surface of the electroslag ingot,and to develop a more suitable turning range. The results showed that composite inclusions with Ti (C,N) and MgAl₂O₃ as the core were formed in the electroslag ingot. With the location of the sample gradually away from the edge of the ingot,the amount of inclusions was reduced from 5 233 to 3 684/mm² and then stable fluctuation in the range of (3 650±30)/mm²;the average size distribution of inclusions was reduced from 7.7 to 4.9 μm and then stable fluctuation in the range of (4.3 ± 0.1) μm. According to the distribution of inclusions in the surface area,the suitable turning range of electroslag ingot is 18-24 mm. The results of industrial experiments show that the new cutting range can improve the surface quality of electroslag ingot after machining.

Key words： GH4169 superalloy electroslag remelting process inclusion turning amount vacuum arc remelting

Received: 25 May 2020

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	Articles by authors
	WANG Di
	YANG Shu-feng
	QU Jing-long
	DU Jin-hui
	AN Teng
	HUANG Yan-cheng

Cite this article:

WANG Di,YANG Shu-feng,QU Jing-long等. Distribution of inclusions on surface of GH4169 ESR ingot[J]. Iron and Steel, 2021, 56(2): 155-161.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200270 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I2/155

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