Supporting base product is currently widely used in the world, forming the casting process

Support base is a key and important part of the railway bogie truck on its product quality and performance of the railway wagon speed , overloading has an important impact . Supporting base product is currently widely used in the world, casting forming. In recent years , with rail transport to improve on overloading, high-speed requirements of the key components of the support base is also increasing  Stainless steel needle valve  inherent product defects steel support base exists ( the mechanical properties of steel castings itself , fatigue toughness, resistance impact is not high , casting products exist unavoidable porosity , shrinkage , inclusions, cracks, etc. ) for the safe operation of high-speed rail has been a threat. Improve the overall mechanical properties of the product 's support base is a major reform and structural adjustment of China's Ministry of Railways to resolve rail transport facing the implementation of overloading, speed , security,  Instrument manifolds  , major issues need to be addressed to improve the effectiveness and efficiency of transportation . To ensure the safety and reliability of the rail wagons running speed , the paper creatively put forward the reform of the support base cast- forging process solutions to improve their mechanical properties. Since the original steel support base products of complex shape , casting the presence of high-gluten product support base , thin-walled structures , to bring support base increased difficulty forging casting change .

Ball has been used as a cutting device used in high temperature and high pressure piping conditions

Since the development of materials and manufacturing technology, pipeline ball valves have been used as a cutting device used in high temperature and pressure conditions. Production of high temperature and pressure valve metal seal valve in supercritical thermal power units are used, replacing the original cut-off valve and the valve, its bubble-tight performance and longer life than traditional globe valves and gate valves. High parameters and high-performance steel ball valve body has not meet the requirements, so a better toughness, higher reliability of forged steel body is very necessary. Structural design forged steel ball valve  Stainless steel needle valve  valve body design first thing to consider forging process, namely the forging process less than a block, a small margin, shape and size close to finished parts, material utilization. Consider the economy, as far as  High pressure ball valve  process of forging equipment, forging equipment because of the large and special use fee is high, while the cost of mold manufacture and use is also more expensive. Forged steel ball valve has two and three-piece. Two-piece body structure more suitable for forging, the body needs to squeeze in a closed die forging, large deformation force requirements, require large forging equipment.