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Tongda X-ray Orientation Analyzer Welcome To Buy

• Posted by tongda edith March 27, 2019 Filed in Business #X-ray Orientation Analyzer  263 views
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  The adverse effects of large thickness ratio on radiographic quality are mainly manifested in two aspects: First, the difference in thickness of the test piece is large due to the difference in thickness of the test piece, and the blackness of the film is too low or too high, which will affect the sensitivity of radiography. Second, due to the thickness variation of the test piece, the scattering ratio is increased, and the edge etching effect is generated. Properly increasing the tube voltage is a common method for transilluminating large thickness ratio specimens, and is also a convenient method. As the tube voltage increases, the difference in blackness at different parts of the film will decrease, so that a larger range of thickness variations of the test piece can be tolerated within the specified blackness range, that is, the tube voltage can be increased to obtain a greater penetration. According to the thickness tolerance. In addition, by transmissing the test piece with varying thickness, increasing the tube voltage can reduce the scattering ratio and reduce the edge erosion effect. Fluorescence analysis of the X-ray tube, but with an increase in ray energy, the attenuation coefficient μ is reduced, resulting in a decrease in contrast, which is detrimental to radiographic sensitivity. Therefore, the tube voltage cannot be arbitrarily increased, and it is appropriate to increase the tube voltage. This is a problem that needs to be studied to determine the specific transillumination process. For workpieces with a large difference in thickness, a two-film technology in which two films are simultaneously placed in one cassette can be used. Two films placed in the cassette should generally be selected from two films with different sensitivities (all-speed two-piece method), and the film with higher sensitivity is suitable for observation and evaluation of the portion with large thickness. The other is to place two films with the same speed at the same speed (two-speed film at the same speed) in the cassette. The tube method is to measure the overlap of the two pieces of blackness, and to measure the overlap of the two pieces. Observation and evaluation.
  
  The compensation technology refers to the method of filling the working thinned portion with the compensation block, compensation powder, compensation mud, compensation liquid, etc., so that the thickness difference of the transillumination can be reduced. The weld seam photographing can use the thickness compensation block, and the irregular shape small parts can be photographed. A fluid absorbent (lead acetate plus lead nitrate solution) or a metal powder (iron powder or lead powder) is used as the thickness compensator. Special technical measures for the inspection of X-ray tubes for large thickness ratio specimens include appropriate improvement of tube voltage technology, dual film technology and compensation technology. The conventional method of ray transillumination allows the test piece to have a certain thickness difference. The thickness range that can be displayed on the ray film (according to the upper and lower limits of the blackness specified in the standard, such as 1.5 to 3.5) is called RT thickness tolerance. Structural analysis of X-ray tubes, but if the thickness difference of the test pieces is too large, the quality will be ineffective. To solve this problem, special techniques or technical measures must be taken. The thickness difference of the test piece can be measured by the thickness ratio of the test piece. The thickness ratio of the test piece can be defined as the ratio of the maximum thickness to the minimum thickness of the test piece in one transillumination range, expressed by Ks. When Ks is greater than 1.4, it can be considered to be a large thickness ratio test piece. In the actual work, the large thickness ratio test piece includes the thin plate butt weld test piece, the small diameter pipe test piece, the fillet weld test piece, and some more complicated mechanical parts.
  
  Dandong Tongda Technology Co., Ltd. specializes in producing various X-ray Orientation Analyzer, continuously improving the precision of our products, and making them more portable. Welcome all interested parties to contact us. I believe that we will never let you down.