Effects of Laves Phase on Burst Behavior of GH3625 Superalloy Pipe During Hot Extrusion

doi:10.11900/0412.1961.2020.00264

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Effects of Laves Phase on Burst Behavior of GH3625 Superalloy Pipe During Hot Extrusion
	Chen Jianjun 2; Ding Yutian 2; Wang Kun 1; Yan Kang 2; Ma Yuanjun 2; Wang Xingmao 2; Zhou Shengming 3
刊名	ACTA METALLURGICA SINICA
	2021
卷号	57 期号:5 页码:641-650
关键词	GH3625 superalloy hot extruded pipe microstructure Laves phase pipe burst
ISSN号	0412-1961
DOI	10.11900/0412.1961.2020.00264
英文摘要	GH3625 superalloy is a type of solid-solution strengthened nickel-based wrought superalloy having Mo and Nb as the main strengthening elements. Because of its excellent high-temperature me-chanical properties and oxidation resistance below 650(o)C, it can be used in harsh stress and atmosphere environments. It is mainly used as a pipe material for aeroengine fuel main pipe, nuclear power steam generator heat transfer pipe, and pressure pipe, etc. Owing to the high alloying degree of nickel-based superalloys, large deformation resistance, and narrow thermal processing temperature range, the pipe preparation process is complicated. In this study, the as-cast and homogenized pipe billets were used for a short-flow hot extrusion pipe preparation test using the same process. The homogenized pipe billet was extruded successfully, and the pipe burst occurred during the extrusion of the as-cast billet. The pipe burst behavior was studied by OM, SEM, and EBSD, with an EDS analysis. The results showed a considerable amount of Laves phases in the as-cast pipe billet, and the Laves phases and micro-segregation were essentially eliminated after homogenization. Adiabatic heating of the as-cast pipe billet leads to the Laves phase remelting during the hot extrusion process, which is the main reason for pipe bursting during a hot extrusion process. The cracking mode of the pipe burst is a quasi-cleavage fracture, combining brittle fracture and ductile fracture with the predominance of the brittle fracture.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000642002500008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148226]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.China Natl Nucl Indust Corp, Co Ltd 404, Jiayuguan 735100, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 3.Jinchuan Grp Co Ltd, State Key Lab Nickel & Cobalt Resources Comprehen, Jinchang 737100, Peoples R China
推荐引用方式 GB/T 7714	Chen Jianjun,Ding Yutian,Wang Kun,et al. Effects of Laves Phase on Burst Behavior of GH3625 Superalloy Pipe During Hot Extrusion[J]. ACTA METALLURGICA SINICA,2021,57(5):641-650.
APA	Chen Jianjun.,Ding Yutian.,Wang Kun.,Yan Kang.,Ma Yuanjun.,...&Zhou Shengming.(2021).Effects of Laves Phase on Burst Behavior of GH3625 Superalloy Pipe During Hot Extrusion.ACTA METALLURGICA SINICA,57(5),641-650.
MLA	Chen Jianjun,et al."Effects of Laves Phase on Burst Behavior of GH3625 Superalloy Pipe During Hot Extrusion".ACTA METALLURGICA SINICA 57.5(2021):641-650.