Method for increasing seawater corrosion resistance performance of MB5 magnesium alloy argon arc welding joint
A technology for argon arc welding and corrosion performance is applied in the field of improving the seawater corrosion resistance of metal welded joints, which can solve the problems of poor corrosion resistance of magnesium alloy welded joints, and achieve the effects of low price, improved seawater corrosion resistance and wide sources.
Inactive Publication Date: 2012-07-25
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, there are few reports on the corrosion resistance of magnesium alloy welded joints
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0010] 1. Taking the MB5 magnesium alloy workpiece after automatic argon arc welding as an example, the operation steps are as follows:
[0011] ① Temper the MB5 magnesium alloy welded joints that have undergone automatic argon arc welding at 320°C for 1 hour;
[0012] ② Put the tempered welded joint into the DWS-2188 cryogenic strengthening treatment device with liquid nitrogen as the cold source and controlled by computer;
[0013] ③ Lower the temperature in the cryogenic treatment device from room temperature to -130°C at a cooling rate of 5°C / min;
[0014] ④ keep warm for 3.5 hours;
[0015] ⑤ Cut off the power supply, turn off the cold source, turn on the device, and let the weldment naturally heat up to room temperature in the cryogenic treatment device;
[0016] ⑥ Lower the temperature in the cryogenic treatment device from room temperature to -130°C at a cooling rate of 5°C / min;
[0017] ⑦Insulation for 3.5 hours;
[0018] ⑧ Cut off the power supply, turn off the c...
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The invention discloses a method for increasing seawater corrosion resistance performance of a MB5 magnesium alloy argon arc welding joint, belonging to the technical field of increasing seawater corrosion resistance performance of metal welding pieces. The method is characterized in that an MB5 magnesium alloy argon arc welding joint is adopted for subzero treatment, and the special operation sequences are as follows: (1) the MB5 magnesium alloy argon arc welding joint undergoing argon arc welding is tempered for 1 hour under a temperature of 300 DEG C to 350 DEG C; (2) the tempered welding joint is put in a subzero treatment device under the control of a subzero treatment system; (3) the temperature of the subzero treatment device drops to minus 130 DEG C to 160 DEG C from room temperature under a temperature reduction rate of 5 DEG C to 7 DEG C / min; (4) heat is preserved for 3 to 4 hours; (5) a power source is disconnected, a cold source is closed, the device is opened, so that thewelding piece is at room temperature in air; (6) the temperature of the subzero treatment device drops to minus 130 DEG C to 160 DEG C from room temperature under a temperature reduction rate of 5 DEG C to 7 DEG C / min; (7) heat is preserved for 3 to 4 hours; and (8) the power source is disconnected, the cold source is closed, the device is opened, so that the welding piece is at room temperature in air.
Description
Technical field: [0001] The invention belongs to the technical field of improving seawater corrosion resistance of metal welded joints, and in particular relates to a method for improving seawater corrosion resistance of MB5 magnesium alloy argon arc welding joints. Background technique: [0002] The strategic position of the ocean has been paid more and more attention to by the world, and the increasing depth of ocean research and ocean exploration has higher and higher requirements for pressure shell indicators. In order to meet the continuous improvement of the overall index, in addition to reducing the weight of the system, the weight of the shell must also be reduced. At the same time, the shell is also the loading body, heat exchange functional parts, and overall connection interface of the system. In addition to meeting the pressure resistance requirements, it must also meet Many functional requirements of the system. [0003] Like underwater vehicles such as submari...
Claims
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IPC IPC(8): C22F1/06
Inventor 赵菲吴志生刘翠荣邓华然宫晓园
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY