A Vacuum Preheating Electron Beam Welding Method for Circumferential Welding Seam of Pressure Shell
A technology for electron beam welding and pressure-resistant shells, which is applied in electron beam welding equipment, welding equipment, welding equipment, etc., can solve the problems of poor weldability of high-strength alloy pressure-resistant shells and low performance of welded joints, and achieve efficient and reliable connections , Solve the effect of poor weldability
Active Publication Date: 2021-11-30
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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[0003] Aiming at the defects of the prior art, the present invention provides a vacuum preheating electron beam welding method for the annular weld seam of the pressure-resistant shell that realizes welding of this type of pressure-resistant shell in a vacuum environment, and solves the problem of high-strength alloy pressure-resistant shell The problem of poor weldability and low performance of welded joints has realized the efficient and reliable connection of high-strength alloy pressure-resistant shells
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[0035] Using the method of the present invention to weld a certain pressure shell, the specific steps are as follows:
[0036] After the assembly of each system is completed, then carry out the inspection of each system, and vacuumize after passing the inspection;
[0037] Make a vacuum to a vacuum of 8×10 -3 After Pa, turn on the heating system, heat according to the set process route, and turn on the water cooling system and temperature monitoring system during the heating process;
[0038] After the heating temperature reaches the target temperature of 400°C, keep it warm for 1 hour, so that the temperature of the pressure shell along the thickness direction meets the welding requirements;
[0039] Stop power supply while continuing to turn on the cooling system and temperature monitoring system;
[0040] Due to the thermal expansion of the workpiece, readjust the position of the electron gun to the center of the welding seam, and then use the turntable to rotate the pres...
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The invention relates to a vacuum preheating electron beam welding method for the annular weld seam of a pressure-resistant shell. The welding of the pressure-resistant shell is realized in a vacuum environment, and the high-temperature preheating is carried out on the pressure-resistant shell before welding, and the welding is carried out while heating. Temperature monitoring and water cooling. After preheating, the circular weld is welded by rotating the turntable. The water cooling can effectively prevent the damage of heat radiation to the parts in the vacuum chamber. After vacuum preheating and electron beam welding, the oxidation of the shell is prevented. , It also solves the problem of poor weldability of high-strength alloy pressure-resistant shells and low performance of welded joints, and realizes efficient and reliable connections of high-strength alloy pressure-resistant shells.
Description
technical field [0001] The invention relates to the technical field of electron beam welding, in particular to a vacuum preheating electron beam welding method for annular weld seams of pressure-resistant shells. Background technique [0002] The pressure-resistant shell is made of high-strength alloy, and two hemispherical shell-shaped parts need to be welded to form a circular weld. However, due to the alloy's high strength, large thickness, long weld length, and complex structure, traditional manual welding Or electron beam welding, the welding structure is poor, the plasticity and toughness of the welded joints obtained are seriously insufficient, and welding defects such as cracks are very easy to appear. The traditional welding method can no longer meet the welding of this type of pressure shell. An effective method for alloy pressure shell welding. Contents of the invention [0003] Aiming at the defects of the prior art, the present invention provides a vacuum pre...
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IPC IPC(8): B23K15/04B23K15/06B23K15/00B23K37/00
CPCB23K15/00B23K15/04B23K15/06B23K37/003
Inventor 耿永亮陈高澎郭宇凡赵坤王岗于冰冰蒋鹏
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP