Influence of pilot gas composition on convective pattern of weld pool surface in plasma keyhole arc welding

被引：0

作者：

van Anh N. ^{[1
]}

Tashiro S. ^{[1
]}

van Hanh B. ^{[2
]}

Tanaka M. ^{[1
]}

机构：

[1] Joining and Welding Research Institute, Osaka University

[2] Hanoi University of Science and Technology, Hanoi

来源：

| 2017年 / Japan Welding Society卷 / 35期

关键词：

Convective pattern; Pilot gas; Plasma keyhole arc welding; Weld pool; Zirconia particle;

D O I：

10.2207/QJJWS.35.98S

中图分类号：

学科分类号：

摘要：

This investigation is purposed to clarify the influence of pilot gas composition to convective pattern on the weld pool surface in Plasma keyhole arc welding process. In order to clarify this, the convective pattern on the top surface of weld pool was investigated in both cases of pilot gas: pure Ar and Ar mixture with 10% hydrogen. For estimating the convective pattern, the zirconia particles with diameter of 0.03 mm were utilized as tracers. After welding, using the software (Dipp-motion, Detect Co., Ltd) for analyzing the movement of zirconia particles, the convective pattern was estimated. In case of pure Ar, zirconia particles were in circulated motions just behind keyhole on the top surface of weld pool, and transported to rear part of weld pool on the bottom surface. In case of Ar mixture with 10% hydrogen, zirconia particles on both surfaces (top surface and bottom surface) of weld pool were in circulated motions behind keyhole. Furthermore, the weld bead shape was narrow on both top surface and bottom surface in case of pure Ar. Meanwhile, the weld bead shape was wide on both top surface and bottom surface in case of Ar mixture with 10% hydrogen. © 2017 Japan Welding Society. All rights reserved.

引用

页码：98S / 102S

页数：4

共 11 条

[1]

van Anh N., Tashiro S., van Hanh B., Tanaka M., Visualization of weld pool convective flow in plasma keyhole arc welding, Frontier of Applied Plasma Technology, 9, pp. 1-6, (2016)

[2]

Tanaka M., Lowke J.J., Predictions of weld pool profiles using plasma physics, J. Phys. D: Appl. Phys., 40, pp. 1-23, (2007)

[3]

Lu W., Zhang Y.M., Emmerson J., Sensing of weld pool surface using non-transferred plasma charge sensor, Meas. Sci. Technol., 15, pp. 991-999, (2004)

[4]

Zhang Y.M., Zhang S.B., Liu Y.C., Plasma cloud charge sensor for pulse keyhole process control, Trans. Sci. Technol., 12, pp. 1365-1370, (2001)

[5]

Liu Z.M., Wu C.S., Chen J., Sensing dynamic keyhole behaviors in controlled-pulse keyholing plasma arc welding, Welding Journal, 92, pp. 381-389, (2013)

[6]

Yamane S., Suzuki H., Toma J., Godo T., Hosoya K., Nakajima T., Yamamoto H., Imaging processing of the weld pool in robot plasma welding system, Quarterly Journal of the Japan Welding Society, 31, pp. 44-47, (2013)

[7]

Yamane S., Godo T., Hosoya K., Nakajima T., Yamamoto H., Detecting and tracking of welding line in visual plasma robotic welding, Quarterly Journal of the Japan Welding Society (in Japanese), 31, pp. 175-180, (2013)

[8]

Satoshi Y., Tracking of welding using image processing, Quarterly Journal of the Japan Welding Society (in Japanese), 84, pp. 35-42, (2015)

[9]

Liu Z.M., Wu C.S., Chen J., Sensing dynamic keyhole behaviors in controlled-pulse keyholing plasma arc welding, Welding Journal, 92, pp. 381-389, (2013)

[10]

Shoichi M., Yasushi T., Flows and temperature distribution of molten pool in Electromagnetic controlled molten pool welding process, Quarterly Journal of the Japan Welding Society (Proceeding), 97, pp. 378-379, (2015)

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