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柴油机曲轴承受交变应力,其失效形式都为疲劳破坏。为了提高曲轴的抗疲劳损害能力,在工艺上可采取不同的强化措施,常见的有感应淬火、氮化处理、滚压、喷丸等。为了解喷丸强化对240合金球墨铸铁曲轴疲劳强度提高的幅度,以及判定能否用喷丸取代现行的氮化处理,对六组共102根合金球墨铸铁曲轴试样(其中未经强化处理的、氮化处理的及喷丸处理的各二组)进行了疲劳极限试验。
Diesel crankshaft bearings subjected to alternating stress, the failure of the form of fatigue damage. In order to improve the crankshaft anti-fatigue damage ability, in the process can take different strengthening measures, the common induction hardening, nitriding, rolling, shot peening. In order to understand the shot peening of 240 alloy ductile iron crankshaft fatigue strength increased amplitude, and to determine whether the use of shot peening to replace the existing nitriding treatment, a total of six groups of 102 alloy ductile iron crankshaft samples (which are not treated , Nitrided and shot peening groups) were subjected to the fatigue limit test.