The forging process builds the grain structure and improves the physical properties of the metal. Die forging can be seen everywhere in daily life, is a kind of industrial products.

Forging: A forming method for applying external force to metal blanks to cause plastic deformation, change size, shape and change performance to manufacture mechanical parts, workpieces, tools or blanks. The types of forgings are: aircraft forgings, diesel engine marine forgings, weapons forgings, petrochemical mine forgings, nuclear power forgings, thermal power forgings, hydropower forgings. What's the problem can also consult Tianfeng metal.

Forging refers to a workpiece or blank obtained by forging and deforming a metal blank. By applying pressure to the metal billet to deform it, its mechanical properties can be changed. Forgings according to the temperature of the billet in the processing, can be divided into cold forging warm forging and hot forging. Cold forging is generally processed at room temperature, and hot forging is processed at a temperature higher than the recrystallization temperature of the metal blank. The loosening of the metal can be eliminated by forging. Holes, so that the mechanical properties of forgings can be improved.

Nuclear power is divided into two categories: pressurized water reactor and boiling water reactor. The main large forgings of nuclear power plants can be divided into two categories: pressure shell and reactor internals. Pressure shell includes: cylinder flange, nozzle section, nozzle, upper cylinder, lower cylinder, cylinder transition section, bolts, etc. The internal components of the reactor work under severe conditions such as high temperature, high pressure, strong neutron radiation, boric acid water corrosion, erosion and hydraulic vibration, so 18-8 Austrian stainless steel should be used to make them.

Relatively speaking, in the case of forging ratio and processing technology are normal, after forging forgings, generally than the profile chemical composition is uniform, fine organization, grain size is also high, so under the same processing conditions, strength and toughness will be better. For example, the general profile will be more serious than hammered forgings, greatly affecting the performance, radial and tangential performance indicators. There are requirements for radial or tangential performance of the workpiece is not good to meet the requirements.

The forging process builds the grain structure and improves the physical properties of the metal. In the practical use of the component, a correct design can make the particle flow in the direction of the main pressure. Die forging is a product in the forging industry, a type of forging. It is a mold object that applies external force to a metal blank and is shaped by plastic deformation into a suitable compression force. This force is typically achieved through the use of a hammer or pressure. The forging process builds the grain structure and improves the physical properties of the metal. Die forging can be seen everywhere in daily life, is a kind of industrial products.

A comprehensive process of heating the forging to a predetermined temperature, holding time, and then cooling at a predetermined rate to change the structure and performance of the forging. Its purpose is internal stress, stop deformation during machining, and adjust the hardness to make forgings conducive to cutting. After the heat treatment of the ingot, according to the requirements of the material of the ingot for air cooling or water cooling, quenching treatment. The preliminary inspection of the forging blank in Wuxi is mainly the inspection of appearance and size. In terms of appearance, it is mainly to check whether there are defects such as cracks. In terms of size, it is necessary to ensure that the blank allowance is within the scope required by the drawing and make records.

A kind of diesel engine forgings, diesel engine diesel engine is a kind of power machinery, it 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.

The reason why hammering forgings have higher performance is that during the hammering process, most (or part) of the defective tissue and large tissue in the matrix will be broken and reorganized, thus making the overall material composition uniform, the tissue and grain fine, and the strength and toughness index will be improved at the same time. Obviously, this is mainly a comparison of the performance of hammering shaft forgings and hot-rolled profiles. If it is a hydraulic press or a hydrostatic forming forging, its performance should be between the above two.

Capillary crack (hair crack), located in the steel surface, deep about 0. 5-1. 5mm of the capillary crack rolling steel, the ingot of the subcutaneous bubble is long and the formation of the rupture. If it is not removed before forging, it may cause cracks in the forging.