The microstructure and mechanical properties of metal can be improved after forging. After hot working and deformation by forging method, the original coarse dendrites and columnar grains become equiaxed recrystallization structure with fine grains and uniform size due to the deformation and recrystallization of the metal, which makes the original segregation, looseness, porosity, slag inclusion and other compaction and welding in the ingot, and its organization becomes more compact, improving the plasticity and mechanical properties of the metal.

Generally speaking, the mechanical properties of castings are lower than those of forgings of the same material. In addition, the forging process can ensure the continuity of the metal fiber structure, so that the fiber structure of the forging is consistent with the shape of the forging, and the metal flow line is complete, which can ensure that the parts have good mechanical properties and long service life. Forgings produced by precision die forging, cold extrusion, warm extrusion and other processes are incomparable to castings.

aircraft forgings

By weight, about 85% of the components on the aircraft are forgings. The turbine disk of the aircraft engine, the rear journal (hollow shaft), the blades, the spar of the wing, the rib plate of the fuselage, the wheel bracket, the inner and outer cylinders of the landing gear, etc. are all important forgings related to the safety of the aircraft. Aircraft forgings are mostly made of high-strength wear-resistant, corrosion-resistant aluminum alloy, titanium alloy, nickel-based alloy and other precious materials. In order to save materials and energy, aircraft forgings are mostly produced by die forging or multi-directional die forging press. Automobile forging is calculated by weight, and 1719 percent of forgings are on automobiles. A general automobile is composed of 15 components such as body, trunk, engine, front axle, rear axle, frame, gearbox, transmission shaft, steering system, etc. Automobile forgings are characterized by complex appearance, light weight, poor working conditions, and safety. High requirements. For example, the crankshaft, connecting rod, camshaft used in the automobile engine, the front beam required by the front axle, the steering knuckle, the half shaft used in the rear axle, the half shaft sleeve, the transmission gear in the axle box, etc., are all related to The key forgings for the safe operation of the car.

diesel engine forgings

Diesel engine is a kind of power machinery, which is often used as an engine. Take a large diesel engine as an example, the forgings used include cylinder head, main journal, crankshaft end flange, output end shaft, connecting rod, piston rod, piston head, crosshead pin shaft, crankshaft transmission gear, ring gear, intermediate gear and dye oil pump More than ten kinds of bodies.

Marine forgings

Marine forgings are divided into three categories, the main engine forgings, shafting forgings and rudder forgings. The main engine forgings are the same as the diesel engine forgings. Shafting forgings include thrust shaft, intermediate shaft stern shaft, etc. Rudder system forgings include rudder stock, rudder post, rudder pin, etc.