Method for making austenitic stainless steel weld defect test plate with unfused defect
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A technology for austenitic stainless steel and unfused defects, which is used in the field of defect test plates
Active Publication Date: 2021-07-06
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 method for manufacturing an austenitic stainless steel weld defect test plate with unfused defects. Gas tungsten electrode shielded welding is used for bottom welding first, and then electrode arc welding is used for filling welding; according to the preset number and position of unfused metal layers, gas tungsten shielded welding is used to make unfused defects in the corresponding weld metal layer; After the defect is made, the weldment is adjusted to the flat welding position, and a layer of weld meat is welded on the top or side of the unfused defect by MIGA welding for post-processing, and the remaining positions continue to be filled by electrode arc welding. The manufacturing method of the austenitic stainless steel weld defect test plate with non-fusion defects proposed by the present invention can realize the preparation of non-fusion defects at any part of the weld, thereby satisfying the comparison test of various detection methods. Application requirements for testing personnel training.
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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