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. Since the deformation of the sample in this case is not a simple stress states forging factory Which is good, but should be seen as a complex structure of. So the question we face is that the test results of the constitutive parameters of how the anti-calculated from a complex material structural deformation. On the trunk of the material it has been established it can not have an inverse, but for physical OAU lines and geometric nonlinearity strong temperature forging process, this approach will not do anything. Forging forging manufacturers _ Super League (certified) _ forged by Luoyang Super League Forging 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. 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.cn/supply_details_46978825.html), for more information about the company.