Manufacturing method of weld defect testing plate for austenitic stainless steel having unfused defects
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A technology for austenitic stainless steel and unfused defects, which is applied in the field of manufacturing defect test plates to achieve the effects of simple operation, easy shape and high reliability.
Active Publication Date: 2020-01-24
WUHAN YIYE STEEL STRUCTURE
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Since there is no formal PAUT testing standard in China, it is necessary to make a defect test plate to conduct a comparative test of different nondestructive testing methods to determine the PAUT testing process of austenitic stainless steel
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Embodiment 1
[0055] Manufacturing method of austenitic stainless steel weld defect test plate with unfused defects on the longitudinal groove side, such as Figure 1 to Figure 3 shown, including the following steps:
[0056] (1) Welding blanking: 304L material, thickness 40mm, cutting by CNC plasma, blanking size 500×150×40mm, two pieces of austenitic stainless steel weldment 1 adopt groove machining groove, in order to prevent welding For deformation, symmetrical X-shaped grooves are adopted, and the angle of paired grooves is 40°;
[0057] (2) Preparation before welding: Grinding both sides of the groove to remove oil and debris to ensure the cleanliness of the groove, and spot welding at both ends of the weldment by gas tungsten shielded welding;
[0058] (3) Backing welding: Gas tungsten arc welding is used for root backing welding, and the welding wire is ER317L (mod.) from Bo-Le, with a diameter of 2.4mm, which is a fully austenitic welding wire. The back side is protected by argon...
Embodiment 2
[0063] Method for manufacturing austenitic stainless steel weld defect test plate with transverse non-fusion defects, such as Figure 4 to Figure 6 shown, including the following steps:
[0064] (1) Welding blanking: 304L material, thickness 40mm, cutting by CNC plasma, blanking size 500×150×40mm, two pieces of austenitic stainless steel weldment 1 adopt groove machining groove, in order to prevent welding For deformation, symmetrical X-shaped grooves are adopted, and the paired groove angle is 40°;
[0065] (2) Preparation before welding: Grinding both sides of the groove to remove oil and debris to ensure the cleanliness of the groove, and spot welding at both ends of the weldment by gas tungsten shielded welding;
[0066] (3) Backing welding: Gas tungsten arc welding is used for root backing welding, and the welding wire is ER317L (mod.) from Bo-Le, with a diameter of 2.4mm, which is a fully austenitic welding wire. The back side is protected by argon gas, and the front a...
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Abstract
The invention discloses a manufacturing method of a weld defect testing plate for austenitic stainless steel having unfused defects. The manufacturing method comprises the following steps of: fittingup one pair of steel plate welding parts after chamfering to-be-welded positions of the steel plate welding parts; carrying out backing welding by adopting gas tungsten arc welding and subsequently carrying out filling welding by adopting shielded metal arc welding; manufacturing unfused defects at corresponding welding seam metal layers according to preset quantity and position of the unfused defects by adopting gas metal arc welding; and after the unfused defects are manufactured, regulating the welding parts to be flat positions of welding, welding a layer of welding surface at the upper surface or the side surface of the unfused defects so as to implement after-treatment by adopting gas metal arc welding, and filling the other positions by adopting shielded metal arc welding. The manufacturing method of the weld defect testing plate for the austenitic stainless steel having unfused defects, disclosed by the invention, can realize manufacturing of unfused defects at any position inthe welding seam so as to meet the application requirements of simulative testing plates for a contrast test of various detection methods or training for testers.
Description
technical field [0001] The invention relates to the technical field of a method for manufacturing a defect test plate, in particular to a method for manufacturing an austenitic stainless steel weld defect test plate with unfused defects. Background technique [0002] At present, the commonly used non-destructive testing methods for austenitic stainless steel in engineering include radiographic testing (RT), ultrasonic testing (UT), and penetrant testing (PT). Austenitic stainless steel grains are coarse, and there are many clutter and low sensitivity when performing UT testing. The experience requirements for non-destructive testing personnel are high. PT is generally used as an auxiliary detection method. Therefore, it is best to detect internal defects in austenitic stainless steel welds. The commonly used method is RT. However, for thick plates, especially those over 50 mm, the contrast of RT detection is poor, and a radioactive source with stronger penetrating power is ...
Claims
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