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曲轴是发动机的五大关键部件之一,它承受着由连杆传来的燃气爆发力和整个曲柄连杆机构的惯性力,主要承受交变弯曲载荷和扭转载荷,在曲轴内将产生复杂的交变应力。同时,曲轴形状复杂,应力集中严重,各轴颈在很高的比压下高速滑动,可引起表面磨损。因此,曲轴必须有较高的疲劳强度、耐磨性能和抗擦伤能力。目前国内对船用曲轴主要采用渗氮处理、圆角滚压强化、中频淬火等工艺强化曲
The crankshaft is one of the five key components of the engine. It withstands the gas explosion force transmitted by the connecting rod and the inertial force of the entire crank and connecting rod mechanism. The crankshaft is mainly subjected to the alternating bending load and the torsional load. The crankshaft will have complicated alternations stress. At the same time, the shape of the crankshaft is complicated and the stress concentration is serious. The journals slide at high speed and high pressure, which can cause the surface to wear. Therefore, the crankshaft must have high fatigue strength, wear resistance and abrasion resistance. At present, the domestic use of marine crankshaft mainly nitriding, rolling round of strengthening, IF quenching and other technology enhancement