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自五十年代末期出现了D6AC超高强度钢以来,由于这种钢具有高的强度/密度比、良好的可加工性和可焊性以及简单的热处理制度等优点而受到了宇航部门的极大重视。美国宇航工业使用多种超高强度钢,但在强度、破断韧性、抗应力腐蚀、加工性能与成本等方面却认为D6AC钢为最好。D6AC钢的抗应力腐蚀比H11,4330和4349钢都高,在相同条件的
Since the advent of D6AC UHMW steels in the late fifties, aerospace has been greatly influenced by the advantages of this steels, due to their high strength / density ratio, good processability and weldability, and simple heat treatment regimes Pay attention. The U.S. aerospace industry uses a variety of ultra-high strength steels, but D6AC steels are considered to be the best in terms of strength, fracture toughness, stress corrosion resistance, processability and cost. The stress corrosion resistance of D6AC steel is higher than that of H11, 4330 and 4349 steel under the same conditions