Particle structure of drop-forged parts

Release time:


The forging process builds the granular structure and improves the physical properties of the metal. Die forgings are found everywhere in daily life and are an industrial product.

  The forging process builds the granular structure and improves the physical properties of the metal. Die forgings are found everywhere in daily life and are an industrial product.

  Forgings: a forming process that applies an external force to a metal billet to deform it plastically, change its size, shape and properties, and is used to make mechanical parts, workpieces, tools or blanks. The types of forgings are: aircraft forgings, diesel marine forgings, weapon forgings, petrochemical mining forgings, nuclear power forgings, thermal power forgings, hydropower forgings. If you have any questions, please consult Tianfeng Metal.

  Forgings are workpieces or blanks obtained by forging and deforming metal blanks. Using pressure on the metal billet to deform it, its mechanical properties can be changed. Forgings can be divided into cold forging warm forging and hot forging according to the temperature of the billet at the time of processing. Cold forging is generally processed at room temperature, and hot forging is processed at a temperature higher than the recrystallization temperature of the metal billet. Through forging can be eliminated metal looseness. Holes, so that the mechanical properties of forgings can be mentioned.

  Nuclear power is divided into two types of pressurized water reactors and boiling water reactors. The main large forgings of nuclear power plants can be divided into two categories of pressure shells and components within the reactor. The pressure shell contains: barrel flange, nozzle section, nozzle, upper barrel, lower barrel, barrel transition section, bolts, etc. The reactor components are in high temperature, high pressure, strong neutron amplitude, boric acid water corrosion, scouring and hydraulic vibration and other severe conditions of work, so to choose 18-8 austenitic stainless steel to make.

  Relatively speaking, in the case of forging ratio and processing technology are normal, after forging forgings, generally than the profile chemical composition of uniform, meticulous organization, grain size is also high, so in the same processing conditions, toughness will be better. For example, the shape of the organization, the general profile will be more serious than the 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 real life use of the part, a correct design allows the particle flow in the direction of the main pressure. Die forgings are a product of the forging industry, a type of forging. It is a die object in which a metal billet exerts an external force, shaped by plastic deformation into a suitable compression force as required. This force is typically achieved through the use of a hammer or pressure. The forging process builds the granular structure and improves the physical properties of the metal. Die forgings are found everywhere in everyday life and are an industrial product.

  A comprehensive process in which forgings are heated to a predetermined temperature, held for a period of time, and then cooled at a predetermined rate to change the organization and properties within the forging. Its purpose is the internal stress, stop deformation during machining, adjust the hardness to make forgings conducive to cutting and processing. After heat treatment of the ingot, according to the material requirements of the ingot for air cooling or water cooling, quenching treatment. Preliminary inspection of Wuxi forging billets, mainly the appearance and size of the inspection. The main inspection is whether there are cracks and other defects in the appearance, and the dimensions need to ensure that the margin of the blank is within the requirements of the drawings, and to keep records.

  Diesel engine forgings of a kind, diesel engine diesel engine diesel engine is a kind of power machinery, it is often used for engine. To large diesel engines, for example, the forgings used are cylinder head, main journal, crankshaft end flange output end shaft, connecting rod, piston rod, piston head, crosshead pin shaft, crankshaft drive gear, gear ring, intermediate gear and dye oil pump body and more than ten kinds.

  The main reason for the high performance of hammered forgings is that the hammering process, the matrix inside the defective tissue and large tissue will be largely (or partially) broken up and reorganized, so that the overall material composition is uniform, organization and grain meticulous, and toughness indicators at the same time to get up. Obviously, this is mainly about the comparison of the performance of hammered shaft forgings and hot-rolled profiles, if it is a hydraulic or machine static forming forgings, its performance should be in between the above two.

  Hairline cracks (hairline cracks), located on the surface of the steel, about 0.5-1.5mm deep hairline cracks rolling steel, the ingot subcutaneous bubble is rolled long and rupture formed. If not removed before forging, may cause forging cracks