Marangoni convection and gas tungsten arc weld shape variations on pure iron plates
文献类型：期刊论文
| 作者 | S. Lu ; H. Fujii ; K. Nogi |
| 刊名 | Isij International
 |
| 出版日期 | 2006 |
| 卷号 | 46期号:2页码:276-280 |
| 关键词 | weld shape Marangoni convection surface tension pure iron oxygen oxide fluxes penetration |
| ISSN号 | 0915-1559 |
| 中文摘要 | Bead-on-plate welds are made on pure iron using Ar-O-2 mixed shielding gas in TIG welding with the O-2 content in the shielding from 0.1 to 3.0%. The weld shapes are analyzed by optical microscopy and the weld metal oxygen content is measured using an oxygen/nitrogen analyzer. Results showed that the weld shape was sensitive to the concentration of the shielding gas. When the O-2 content in the shielding gas is in the range of 0.3 to 1.0 %, the weld shape is narrow and deep and the weld depth/width ratio reaches 0.5. Outside this range, the weld shape is shallow and wide. The small addition of oxygen to the argon shielding gas in TIG welding provides a means of adjusting the oxygen content in the liquid pool. The oxygen in the pure iron pool plays an important role as an active element, which directly affects the Marangoni convection mode in the pool. When the oxygen content in the pure iron pool is between 80 ppm and 250 ppm, an inward Marangoni convection occurs on the pool surface. The weld beads are significantly oxidized with the increasing oxygen content in the shielding gas. However, this oxide layer will not become a barrier for oxygen absorption into the liquid pool. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34383]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | S. Lu,H. Fujii,K. Nogi. Marangoni convection and gas tungsten arc weld shape variations on pure iron plates[J]. Isij International,2006,46(2):276-280. |
| APA | S. Lu,H. Fujii,&K. Nogi.(2006).Marangoni convection and gas tungsten arc weld shape variations on pure iron plates.Isij International,46(2),276-280. |
| MLA | S. Lu,et al."Marangoni convection and gas tungsten arc weld shape variations on pure iron plates".Isij International 46.2(2006):276-280. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。