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首页> 外文会议>International Conference on Proceeding amp; Manufacturing of Advanced Materials; 20060704-08; Vancouver(CA) >Analysis of the welding materials by OPA technique
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Analysis of the welding materials by OPA technique

机译：用OPA技术分析焊接材料

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摘要

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.
机译：原始位置统计分布分析（OPA）技术是一种新型分析方法，可用于检测钢铁材料的偏析，孔隙率和非金属夹杂物。在本文中，该技术已应用于分析两个中低合金焊接板样品。一个样品是正常的，焊缝没有任何缺陷，而另一个样品的焊缝有一个明显的缺陷。对于每个样品，都对焊缝和母材进行了扫描和分析，从而准确地获得了扫描区域中每个元素的连续含量分布。从含量分布图可以直接观察到焊缝形状和过渡区。利用母材到焊缝的含量曲线，计算出含量变化范围及其变化梯度。建议使用这两个参数来评估焊缝质量和焊接工艺。对于缺陷少的样品，在其缺陷区域中，C和S的含量较高，而镍，铬，锰，钼，铝等金属元素的含量较低。该结果给出了其力学性能相对较差的原因。建议该缺陷完全是由另一种材料造成的。

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