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锅炉的使用条件苛刻,有爆炸的危险性,因此,保证锅炉对接管接头焊缝的质量是非常重要的.为了保证焊接质量,常采用射线照相方法检验焊接接头的裂纹、未熔合、未焊透、夹渣、气孔等缺陷.当射线料透照双壁双投影时,如透照角度太大,将使缺陷在底片上投影严重变形,还会使纵向裂纹等线性缺陷漏检;透照角度太小,接近于0°,会使上下焊缝影象在底片上重叠,难以分辨缺陷的准确位置.为了提高缺陷的检出率,保证焊接质量,在哈尔滨锅炉厂生产的410 t/h锅炉管子接头焊缝射线照相中,进行了试验.
Therefore, it is very important to ensure the quality of the weld of the joint to the boiler, in order to ensure the quality of the welding, the radiographic method is often used to check the crack, unfused and incomplete penetration of the welded joint , Slag inclusions, porosity and other defects.When the ray material through the double-wall double projection, such as the perspective of too much penetration, the defect will be in the film on the projection of serious deformation, but also to longitudinal cracks and other linear defects missed inspection; perspective Too small, close to 0 °, will make the upper and lower weld images overlap in the film, it is difficult to tell the exact location of the defect.In order to improve the detection rate of defects and ensure the welding quality, produced in Harbin Boiler 410 t / h boiler Pipe joint weld radiography, the test.