Preparation method of friction stir welding composite stirring head made of materials with high melting point

The invention discloses a preparation method of a friction stir welding composite stirring head made of materials with a high melting point. The stirring head is composed of a conical stirring pin atthe end and a cylindrical shaft shoulder at the root, and a fillet transition design is adopted between the root and the end of the stirring head. The stirring pin and the exterior of the shaft shoulder are made of 1WC-(Fe-Co-Ni), the core part of the shaft shoulder is made of 2WC-(Cu-Ni), a stirring head composite blank is formed after compression molding, and the composite blank is subjected topre-sintering, machining and vacuum sintering to obtain the finished product. The method is easy to operate, the stirring head is easy to process, the machining allowance in subsequent machining of the finished sintered product is greatly reduced, the production cost is reduced, and the production cycle is shortened. 本发明公开了高熔点材料搅拌摩擦焊复合搅拌头的制备方法。搅拌头由端部的锥状搅拌针和根部的圆柱状轴肩组成，其根部和端部采用圆角过渡设计。搅拌针和轴肩外部由材质1WC-(Fe-Co-Ni)、轴肩心部由材质2WC-(Cu-