Research of Welding P91 steel with Shielded Metal Arc Welding (SMAW) and Gas Tungsten Arc Welding (GTAW) processes
Main Article Content
Abstract
P91 steel (9Cr-1Mo-V-Nb-N) was developed from the mid-1970s by the Oak Ridge National Laboratory (ORNL) under the auspices of the USA government. The challenges encountered when welding this steel alloys such as mechanical properties of heat affected zone (HAZ) is high. This will affect the ability of the structure to work in conditions with high temperature and high pressure. This article will focus on the study of theory and experiment in order to overcome this phenomenon, through the search for welding parameter ranges and reasonable heat treatment to improve toughness in HAZ as well as quality assurance of weld.
Keywords
welding of P91 steel, T91 steel, 9Cr-1Mo-V-Nb-N steel, Chromium-molybdenum steel
Article Details
References
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[2]. AWS Welding Handbook, Volume 4, 8th edition.
[3]. Erich Folkhard, Welding Metallurgy of stainless steels.
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[2]. AWS Welding Handbook, Volume 4, 8th edition.
[3]. Erich Folkhard, Welding Metallurgy of stainless steels.
[4]. TS. Ngô Lê Thông, Công nghệ hàn điện nóng chảy, Tập 2, Nxb Khoa Học và Kỹ Thuật.
[5]. Heat resistant alloy welding, Rolled alloys.
[6]. Kent K. Coleman and W. F. Newell JR., P91 and Beyond – Welding the new generation Cr-Mo alloys for high temperature service.
[7]. Welding consumable for P91 steels for the power generation industry, Metrode Co.,
[8]. AWS D10.8 – 96, Recommended Practices for Welding of Chromium-Molybdenum Steel Piping and Tubing.
[9]. Tài liệu quy án nhiệt điện Vũng Áng: VA1-LI-00100-QA-G1-PRO-0011; VA1-LI-00100-M-M8-HT-0001; VA1-LI-00100-M-M8-PWHT-0001.
[10]. Tài liệu quy án nhiệt điện Mông Dương 1: MD1-0-T-003-05-00104.
[11]. Z Zhan, A W Marshall, G B Holloway, Flux cored arc welding: the high productivity welding process for P91, Metrode product limited, UK.
[12]. AWS D10.4 - 86 Recommended Practices for Welding Austenitic Chromium-Nickel Stainless Steel Piping and Tubing.