1. The raw materials are microscopic crack crack: strict internal quality control of raw materials. 2. Heat Treatment improper operation (heating rate is too fast, improper coolant selected, the cooling time is too long): Note preheating, select the appropriate coolant. 3. The special shape of the mold, uneven thickness, with sharp corners and threaded holes, etc.: Forge threaded holes to plug, fill the corners forging, dressing dangerous section and thin-walled, take quenching. 4. without intermediate annealing, hardening the surface again: when the repair or renovation of mold forging process required for annealing or tempering. 5. After quenching and tempering is not timely: Timely tempering. 6. tempering inadequate: to ensure tempering time, the number of tempered steel should be required. 7. Improper grinding operations: Select the correct grinding process. 8. EDM, hardening layer high tensile stress and there microcracks: Improved EDM; de-stress temper; removing the hardened layer electrolysis or corrosion or other methods. Put forth by parametric surfaces to approximate the mold surface, such as MARC's AUTOFORGE software using B-spline surfaces. Beijing electromechanical the ongoing research work with natural surfaces and B-spline surfaces together describe the mold surface. This description of the method of forging, not only reduces the number of grids describing the mold surface, to reduce the contact time of the search, and the normal continuous change eliminates contact locking phenomenon. Forging forging sales _ 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_46978885.html), for more information about the company.