1. The inherent quality of steel caused cracking cracking: strict internal quality control of steel. 2. The original tissue thick: improve the organization through appropriate pre-heat treatment. 3. quenching temperature is too high or too long holding time: proper understanding of heat treatment to improve the organization. 4. In the area of ??temper brittleness tempering: try to avoid the area tempering temper brittleness. 5. tempering tempering temperature is low or insufficient time: select the appropriate tempering process. Although there are a lot of these problems and solutions have been used in a variety of metal forming simulation software, but since the metal molding die shape complexity, the prior method there are many areas for improvement within the ring gear machining, so Since the contact problem is one of the algorithm is still a hot topic in the field of metal forming simulation. For example, in a three-dimensional simulation software, usually geometric shape of the mold surface with a lot of flat mesh approach, this method, although simple calculation to determine the contact, but due to the more accurate description of the requirements of the mold shape more dense mesh ring gear sales, so contact searches the more the time required by the computer. More than half of each time step during the time required for complex switchboard shape of the workpiece, the workpiece mesh finite element mesh and mold are often in the late parts forming, or even contact boundary processing machine. Low-level internal ring gear forging _ Super League (certified) _ Yuncheng ring gear forging Luoyang Super League Limited. Luoyang Super League Forging Co., Ltd. (www.lysmzg.com) (www.lysmzg.com) 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. Forged in the Super League leaders with the staff warmly welcome all inquiries negotiations to create Super League forging a better future. You can also access (www.lysmzg.com/supply_details_45816365.html), for more information about the company.