Analysis of the Welding Materials by OPA Technique

Abstract:

Article Preview

Original position statistic distribution analysis (OPA) technique is a new kind of analysis method that can be used to detect the segregation, porosity and non-metal inclusion of iron and steel material. In the present paper, the technique has been applied to analyze two middle and low alloy welding plate samples. One sample is normal and there is no any defect in its welding seam, whereas the other sample has one obvious little defect in its welding seam. For each sample, both the welding seam and the mother material were scanned and analyzed, and the continuous content distribution of each element in scan area was thus accurately obtained. From the content distribution map, the weld shape and the transition zone were directly observed. By using the content curve from mother material to the welding seam, the content change range and its change gradient were calculated. These two parameters were suggested to evaluate the quality of the welding seam and the welding technology. For the sample with the little defect, in its defect region the contents of C and S presented higher, whereas the contents of metal elements such as Ni, Cr, Mn, Mo, Al presented lower. This result gave the reason why its mechanics property was relatively bad. It was suggested that the defect completely resulted from another kind of material.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

4099-4104

Citation:

M. L. Li et al., "Analysis of the Welding Materials by OPA Technique", Materials Science Forum, Vols. 539-543, pp. 4099-4104, 2007

Online since:

March 2007

Export:

Price:

$38.00

[1] Haizhou Wang. Original position statistic distribution analysis (Original Position Analysis)- New analytical method in the research and quality evaluation of materials. Science in China (series B). 2002, 32 (6), pp.481-484.

DOI: https://doi.org/10.1360/03yb9017

[2] Haizhou Wang. Several problems about the metallurgy analysis of 21th century. Steel and Iron. 2000, 35 (1), pp.73-78.

[3] Haizhou Wang. The metallurgy material analysis toward new century. LIHUA JIANYAN (Chemistry). 2001, 37 (1), pp.49-52.

[4] Zhijun Yang, Haizhou Wang. Applied study about the billet quality by OPA technique. Iron and Steel, 2002, (Supplement), pp.189-193.

[5] Zhijun Yang, Haizhou Wang. The study about the segregation and inclusion in billets. Iron and steel, 2003, 38(3), pp.61-63.

[6] Hongbin Gao, Yunhai Jia, Haizhou Wang. Spectrum behavior of different state aluminum 10th China Annual Conference of Spectrum, 2000, Beijing, China Society of Metals. 2000, B1-B5.

[7] Meiling Li, Xiuxin Zhang, et al. Original position statistic distribution analysis for centerline segregation of cross section of continuous casting slab. Iron & steel. Supplement (39) 2004, pp.66-73.

[8] Jiwen Chen, Meiling Li, et al. Study on the centerline segregation and the inclusion distribution in the cross section of slab with different drawing speeds. The 12th annual conference of analysis & test of Chinese society for metals . Beijing, China, 2004, pp.90-98.

Fetching data from Crossref.
This may take some time to load.