718H steel, Yong Wei steel mold (certified), Yangjiang 718H provided by the Dongguan City An Yongwei steel mold shop. Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) is specialized in the "mold steel, DC53, SKD11.SUS440C, SUS420" business, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Simon / R. How rational use of die steel rolled plate and forging module, forgings? A: The market is well-known materials such as imported brands 1.2738,1.2311,1.2312, SP300, SP350 and other kinds of steel, its essence is forging pre-hardened module. So, what module and plate rolling difference? Judging from the production process, will be able to glance: the production process modules: EBT EAF (to avoid oxidation slag into the ladle refining process steel slag separation method) / LF refining (use a ladle of molten steel refining) → VD vacuum degassing gas (reducing the content of H 718H steel sheet, reduce cracking, shrinkage, skin bubbles, central loose steel) / argon casting / slow cooling annealing / ingot finishing / ingot heating / 3150 ton hydraulic press forging / heat / Simian roughing / testing → both ends of the cutting / delivery. Rolled plate production process: A, furnace / secondary refining / casting / rolling; B, BF / hot metal pretreatment / converter / secondary refining / casting / rolling; forging die or metal die-casting mold, requiring very low surface roughness. Once this type of mold thermal fatigue cracks, it can not continue in service. So 718H manufacturers, service life of these molds, mainly on the thermal fatigue crack initiation time ordinary die allows a certain size thermal fatigue cracks. Thus, the life of the mold 718H material, depending on the thermal fatigue crack initiation and propagation velocity time when black metal cold extrusion, thermal effects due to the severe deformation of the metal flow generated by the die temperature rises, sometimes can be up to 150 ^ 4000C. Mold cyclical temperature changes may also cause thermal fatigue cracking and failure