We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.
Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.
Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
Preheating deformation in straight seam steel pipes is a critical factor in ensuring the precision and longevity of molds used in their manufacturing. The following methods aim to reduce deformation during the production process by optimizing material selection, heat treatment, and mold design.
Reasonable Material Selection
For precision and complex molds, it is essential to choose micro-deformation mold steel with superior quality. Mold steel with significant carbide segregation should undergo proper casting techniques and be subjected to quenching and tempering heat treatment. For larger, uncastable molds, a solid solution double-refining heat treatment is recommended. Additionally, selecting the right heating temperature and controlling the heating speed are important. Slow heating, preheating, and balanced heating methods can be employed for precision and intricate molds to minimize heat treatment deformation.
Optimizing Heat Treatment Process
A well-managed heat treatment process, including an appropriate tempering heat treatment, plays a crucial role in reducing deformation. The causes of deformation in precision complex molds can be complex; however, by understanding the deformation patterns, identifying root causes, and applying specific preventive measures, deformation can be minimized and controlled.
Preheating to Eliminate Residual Stress
For precision and complex molds, preheating is vital to eliminate any residual stresses left over from machining. If conditions allow, vacuum heating quenching and cryogenic treatment after quenching should be preferred. To ensure the hardness of the mold, pre-cooling, graded cooling quenching, or warm quenching processes should be used as much as possible to reduce the risk of deformation.
Designing the Mold Properly
The mold design should be reasonable, ensuring uniform thickness and symmetrical shape. For molds prone to significant deformation, deformation patterns should be closely monitored, and machining allowances should be factored in. In the case of large, precision, and complex molds, a combined design approach can be adopted. Furthermore, pre-heat treatment, aging heat treatment, and quenching and tempering nitriding heat treatment can be employed to maintain the mold's accuracy. When repairing mold defects such as blisters, pores, and wear, low thermal impact equipment like cold welding machines should be used to prevent deformation during the repair process.
By following these methods, the deformation of straight seam steel pipe molds can be effectively controlled, ensuring higher precision and a longer service life for the molds used in manufacturing.
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