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本文摘译自《电气制钢》,1983年第2期,多田光一郎等的文章。飞机起落架即飞机着陆装置,占有机体重量的一定百分数,为了使飞机轻量化,在设计上作出很大努力。从材料来说,结构部件应最大限度地采用薄壁材以适应轻量化,并能承受着陆时的冲击,故要求材料具有高强度、高延韧性。目前从性能、成本和可靠性等方面,作为起落架材料,大部分选用4340钢和改良钢种4340M。1979年大同特殊钢公司,取得了对美国最大的飞机制造厂Boeing公司材料的许可,还炼制了大量的作为起落架材料的代表钢种4340M。Boeing公司和Republic steel公司共同研制了4340M的后备钢种,抗张强度比4340M钢约高3％的220kgf/mm~2级别的HP310钢,并确立了
This article excerpts from the “Electrical Steel”, No. 2, 1983, Ichiro Tanaka et al. Aircraft landing gear that aircraft landing gear, accounting for a certain percentage of the weight of the aircraft, in order to make the aircraft lighter, made great efforts in the design. From the material, the structural components should be to maximize the use of thin-walled materials to adapt to lightweight, and can withstand the impact of landing, it requires the material with high strength, high toughness. Currently from the performance, cost and reliability aspects, as the gear material, most of the selection of 4340 steel and 4340M modified steel. In 1979, Datong Special Steel obtained permission to Boeing, the largest aircraft manufacturer in the United States, and refined a large amount of 4340M, the representative steel for landing gear materials. Boeing and Republic steel co-developed 4340M backup steel, tensile strength of about 3% higher than the 4340M steel 220kgf / mm ~ 2 grade HP310 steel, and established