Connecting and heat treatment method suitable for additive manufacturing valve shell

A connecting and heat treatment method suitable for an additive manufacturing valve shell meets the manufacturing requirement of a high-thrust liquid rocket engine and is suitable for the additive manufacturing valve shell, and the additive manufacturing shell under the low-temperature and high-pressure service environment is manufactured by arranging a connecting form, welding process parameters, a heat treatment method and a beam welding tool for preventing welding leakage. According to the obtained shell base body and the welded joint, the room-temperature tensile strength is larger than 1200 MPa, the yield strength is larger than 1100 MPa, the ductility is not lower than 10%, the percentage reduction of area is not lower than 40%, the normal-temperature impact energy is not lower than 80 J, the-196 DEG C low-temperature impact energy is not lower than 50 J, the internal quality and the surface quality of the welded joint are qualified, and the GJB1718A-2005I-level welding seam standard is met. 一种适用于增材制造阀壳