Analysis of the Structure, Phase Composition and Mechanical Properties of a Tubular Welded Joint from Refractory Alloy HP40NbTi

被引：2
作者：
Kondrat'ev, S. Yu. [1 ]
Fuks, M. D. [2 ]
Frolov, M. A. [1 ,2 ]
Petrov, S. N. [1 ,2 ]
机构：
[1] Peter Great St Petersburg Polytech Univ, St Petersburg, Russia
[2] Natl Res Ctr, Kurchatov Inst, Cent Res Inst Struct Mat Prometey, St Petersburg, Russia
来源：
METAL SCIENCE AND HEAT TREATMENT | 2021年 / 62卷 / 11-12期
关键词：
refractory austenitic alloys; welded joint; microstructure; phase composition; G-phase; mechanical properties; PYROLYSIS FURNACES; LIFE ASSESSMENT; CAST; TEMPERATURE; TUBES; MICROSTRUCTURE; NB; TRANSFORMATIONS; AUSTENITE; KINETICS;
D O I：
10.1007/s11041-021-00622-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The methods of optical and electron microscopy and x-ray spectrum microanalysis are used to study the microstructure and phase composition of a tubular welded joint from alloy HP40NbTi based on the Fe - 25Cr - 35Ni system. Short-term and long-term mechanical properties of the alloy are determined. The joint is characterized by structural inhomogeneity and formation of silicon segregations and G-phase in the structure of the metal in the heat-affected zone. It is shown that the special features of the structure of the welded joint from alloy HP40NbTi lower considerably its mechanical properties at the operating temperatures of pyrolysis facilities.
引用
收藏
页码：677 / 688
页数：12
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