电焊机2024，Vol.54Issue(12)：68-73,6.DOI:10.7512/j.issn.1001-2303.2024.12.11
双金属复合管侧壁开孔处机械氩弧堆焊镍基耐腐蚀层的性能研究
Study on the Properties of Ni-based Corrosion Resistant Coating by Me-chanical Gas Tungsten Arc Welding Overlayed on Bimetallic Composite Pipe
张凯 1程显平 1田雷 1刘文婷 1张恒玮1
作者信息
- 1. 海洋石油工程(青岛)有限公司,山东 青岛 266520
- 折叠
摘要
Abstract
In order to solve the problem that the side wall of bimetallic composite pipe is easy to corrode without corrosion resistant layer,this paper adopted the method of Mechanical Gas tungsten arc welding to prepare ERNiCrMo-3 Ni-based cor-rosion resistant layer on the side inner wall of API 5L X65Q+625 Clad pipe and and comparative study of manual argon arc corrosion-resistant layer of the preparation of the organization and performance.The results show that mechanical argon arc welding has higher efficiency and lower heat input than manual argon arc welding.The nickel-based cladding layer has good forming,excellent mechanical properties and corrosion resistance.Among them,the mechanical argon arc welding prepara-tion of nickel-based corrosion resistant layer microstructure is finer than the manual cladding and no intermetallic com-pounds,carbides,nitrides and other precipitation phases;cladding layer,heat-affected zone,the average microhardness of the substrate were 226 HV,200 HV,179 HV.Mechanical cladding layer have lower microhardness than manual argon arc cladding layer and did not have local hardening area;At the same time,corrosion-resistant layer has a lower dilution rate,the iron element content is 5.74%,corrosion resistance equivalent PREN up to 50,showing good resistance to pitting corrosion;ASTM G28-2(2015)method A test conditions of intergranular corrosion is only 0.437 mm/y,showing good resistance to in-tergranular corrosion performance.关键词
双金属复合管/机械氩弧/堆焊/晶间腐蚀Key words
Bimetallic composite pipe/Mechanical Gas tungsten arc welding/Overlay/Intergranular corrosion分类
矿业与冶金引用本文复制引用
张凯,程显平,田雷,刘文婷,张恒玮..双金属复合管侧壁开孔处机械氩弧堆焊镍基耐腐蚀层的性能研究[J].电焊机,2024,54(12):68-73,6.
