Method for displaying presence of diffusible hydrogen in welding seam in production field

• Main Authors: XIANG XIAOLIN, JU ZHE, ZHANG HUI, JIANG CHANGMING, LIU YUZHI, LEI MINGXIA, GAO XUEPENG, JIANG YINGTIAN, ZHANG YICHENG, LI XIANCHEN, WANG YUNLING, WEN LIMING
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a method for displaying diffusible hydrogen in a welding seam on a production site, which comprises the following steps of: after the welding of the welding seam to be tested is finished, naturally cooling to reduce the temperature of the welding seam to be below the quenching temperature, and then accelerating cooling to room temperature. then cleaning a welding seam, uniformly coating a pre-prepared bubble display liquid on a test welding seam part, covering the brushed test welding seam by using a transparent cover, and sealing the transparent cover and a weldment by using a sealing belt. The diffusion hydrogen bubbles formed by the bubble display liquid coated on the surface of the weld joint can be visually observed after the weldment to be detected is subjected to standing for 0.5-10 hours, and a digital camera can be used for photographing so as to carry out qualitative judgment. 本发明涉及一种用于生产现场显示焊缝中存在扩散氢的方法，包括下述步骤，在待测试焊缝焊接结束后首先经过自然冷却使焊缝温度降至淬火温度以下，然后加速冷却至室温。清理焊缝，随后将预先配制的气泡显示液均匀涂覆