Energy spectrum analysis of casting defect samples; For example, the table shows the element composition of each scanning point in the casting defect sample; The figure shows the energy spectrum of points 1 and 5 of the casting defect sample.
It can be seen from the table and figure that the components of points 1, 2 and 3 are quite different from those of points 4 and 5, among which, the elements of points 1, 2 and 3 are similar in composition and can be classified into one group; The elements in points 4 and 5 are similar and can be classified into another group. The composition of points 1, 2 and 3 are mainly O and Si elements, and no major alloy element Fe in the alloy matrix is detected. According to the element composition and particle shape, the particle is sand. Since these sand grains have clear contour and do not melt with liquid metal to form sheet, it can be confirmed that the casting defect type is sand hole; The composition of points 4 and 5 contains more Fe, Cr elements and a certain amount of C, which should be the alloy matrix according to the composition and morphology.
| Measuring point | O | Si | N | Fe | Cr | C |
| 1 | 75.15 | 24.85 | 0 | 0 | 0 | 0 |
| 2 | 76.13 | 23.87 | 0 | 0 | 0 | 0 |
| 3 | 69,05 | 30.95 | 0 | 0 | 0 | 0 |
| 4 | 13.94 | 0 | 0 | 71.21 | 14.53 | 0.31 |
| 5 | 13.78 | 0 | 0.90 | 73.80 | 10.98 | 0.54 |