Scope head is more extensive, although widely used, but is largely used in the more important occasions, such as the chemical industry and metal container industries. Therefore, when using the head must be used with caution, comprehensive understanding of head knowledge head, this will be more secure. Ltd. Taian head below for your detailed description of the head of Use common sense. 1 Precautions head using the occasion: carbon steel head will crack occurs in nitrates, ammonia, sodium and other alkaline environment, please indicate when ordering heads eliminate the residual stress. 2 austenitic stainless steel in chloride ions under certain circumstances occur stress corrosion cracking head price favorably, please select the appropriate material at design time. 3 to prevent direct contact with the carbon steel to avoid iron contamination. 4 is not open storage, rain. 5 Avoid Forced welding. Structural design to prevent excessive restraint stress. 6 hydrostatic test water chloride ion content of not more than 25mg / L, the test should be promptly dry. 7 stainless steel pickling acid with hydrochloric acid, etc. can not be restored. These are issues when using the head should be noted, I hope to give you a help. Hebei billion to buy gold head Pipeline Co., head quality trustworthy, free to teach skills to use head. Head forging process temperature field strengths of each use of the forging process has a lot of manufacturing head, here we come to understand the circumstances under other forging temperature domain. Blank when the cold deformation and work hardening, forging die to withstand high loads, and therefore, a high strength die and used to prevent adhesion of the hard wear and lubricating film processing method. In this process, in order to prevent the blank cracks, intermediate annealing required to ensure deformation when needed. In order to maintain good lubrication, stainless steel head can be blank phosphate treatment. In continuous processing with bar and wire rod, because of the current process limitations on the cross-section can not be lubricated, it is now also studying the use of phosphate lubrication method, not only is it possible. Warm forging advantage is that you can improve the accuracy and quality of forgings head Hebei billion in gold, while not as big as cold forging force. Application forging material, forging size, complexity of forging and warm forging process are closely related. General quality head, the shape of less complex low-carbon, low-alloy steel of small precision forging, cold forging process can be formed using; For complex shape of small and medium carbon steel precision forging, cold forging methods are difficult to solve the forming problems, or simply using the high cost of cold forging process may be applied warm forging. The recrystallization temperature of the steel of about 750 ℃, 700 ℃ when more forging, the deformation can be obtained dynamically released, forming a sharp decrease resistance; forging at 700-850 ℃, small scale forging, surface decarburization phenomenon is relatively minor, minor dimensional changes forgings; while forging more than 950 ℃, although forming force is smaller, but forging scale and surface decarburization serious, forging size larger changes. Thus forging get better quality and precision forgings are within the range of 700-850 ℃. Head _ Hebei billion gold prices favorably pipeline _ head provided by Hebei million gold piping. Gold Pipe Manufacturing Co., Ltd. Hebei billion (www.yijinguanjian.com) in the insulation joints, insulating flange, flanges, elbows, head, tee, head, Stone, steel and other industries have a higher visibility, credibility Operating both quality service, welcome to inquire, or consult our "Business League call" it!