ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Original position statistic distribution analysis (OPA) technique is a new kind of analysismethod that can be used to detect the segregation, porosity and non-metal inclusion of iron and steelmaterial. In the present paper, the technique has been applied to analyze two middle and low alloywelding 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, boththe welding seam and the mother material were scanned and analyzed, and the continuous contentdistribution of each element in scan area was thus accurately obtained. From the content distributionmap, the weld shape and the transition zone were directly observed. By using the content curvefrom mother material to the welding seam, the content change range and its change gradient werecalculated. These two parameters were suggested to evaluate the quality of the welding seam andthe welding technology. For the sample with the little defect, in its defect region the contents of Cand S presented higher, whereas the contents of metal elements such as Ni, Cr, Mn, Mo, Alpresented lower. This result gave the reason why its mechanics property was relatively bad. It wassuggested that the defect completely resulted from another kind of material
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4099.pdf
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