Three-way valves are widely used in real life, such as some liquid transportation, fire protection, chemical, medical and other industries. When the three-way valve is working, its interior is filled with high-pressure liquid or gas, which not only has the high-pressure pressure load acting on the inside of the valve body, but also the dynamic load acting on the outside of the valve body. Due to the existence of complex alternating loads, the three-way valve The mechanical properties, fatigue resistance and organization uniformity of the valve body are required to be high.