Casting earlier human grasp a metal thermal processing standard gear ring, about 6,000 years old. 3200 BC, Mesopotamia appear copper frog castings. BC 13 to 10 centuries ago between the gear ring prices, China has entered the heyday of bronze casting rubber ring gear, the technology has reached a very high level, such as Shang weight 875 kg of Simuwu Fangding, the Warring States Period statue of Marquis Yi of translucent mirror plate and the Western Han Dynasty, etc. are representative of ancient casting products. The forging billet deformation process as deformable bodies, metal forming process is a variation of the temperature field and microstructure field coupling. This process is described by a set of differential equations. This set of differential equations include: stress equilibrium equations, describing the strain - displacement / strain rate - the speed of the geometric relationship between the equations that describe the material stress ~ strain, strain rate, temperature, microstructure relations constitutive equations. Ring gear forgings, forging Super League (certified), ring gear forging Luoyang Super League Limited. Luoyang Super League Forging Co., Ltd. (www.lysmzg.com) (www.lysmzg.cn) is Luoyang, forgings leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Sheng League forging leadership staff warmly welcome all inquiries negotiations to create Sheng League forging a better future. You can also access (www.lysmzg.cn/supply_details_49347025.html), for more information about the company.