Aluminium-Assisted Alloying of Carbon Steel in Submerged Arc Welding: Application of Al-Cr-Ti-Cu Unconstrained Metal Powders

被引：14
作者：
Coetsee, Theresa [1 ]
De Bruin, Frederik [1 ]
机构：
[1] Univ Pretoria, Dept Mat Sci & Met Engn, ZA-0002 Pretoria, South Africa
来源：
PROCESSES | 2022年 / 10卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
oxygen potential; titanium; aluminium; copper; chromium; metal powder; submerged arc welding; OXYGEN CONTAMINATION; EQUILIBRIUM; CHEMISTRY;
D O I：
10.3390/pr10030452
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Al assisted alloying of carbon steel in Submerged Arc Welding (SAW) by Al-Cr-Ti-Cu unconstrained metal powders is applied. A base case without metal powder additions is compared to two metal powder addition schedules, Al-Cu-Ti and Al-Cu-Ti-Cr. Al powder is used as a deoxidiser element to control the oxygen partial pressure at the weld pool-molten flux interface to ensure that most of the Ti and Cr metal powder is transferred into the weld pool and that the weld metal ppm O is controlled within acceptable limits of 200 to 500 ppm O. The likely sequence of alloy melt formation is deduced from the relevant alloy phase diagrams. The effect of Fe addition into the initial Al-Cu-Ti and Al-Cu-Ti-Cr alloy melt is illustrated in thermochemical calculations. Increased metal deposition productivity with metal powder addition in SAW is confirmed. The metal deposition rates increased by 19% and 40% when Al-Cu-Ti and Al-Cu-Ti-Cr powders were applied at the same weld heat input used in the absence of metal powder additions.
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页数：19
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