张乐,连勇,高文,张津

• 1:北京科技大学新材料技术研究院
• 2:北京市腐蚀磨蚀与表面技术重点实验室

摘要(Abstract)：

60Si2Cr VA弹簧在服役状况下,运行寿命不到设计寿命的1/3,发生了断裂。为了分析弹簧的断口和断裂原因,根据该弹簧钢的制造和服役状况,对断口宏观形貌、SEM照片进行了分析;并对弹簧钢的应力分布、化学成分、组织和硬度进行了分析。发现了弹簧断裂为疲劳断裂,其失效起源于表面缺陷和最大切应力的共同作用,且弹簧内部组织有石墨化现象,硬度高,韧性降低,导致了整个工件的断裂。提出了该弹簧在加工过程、检测过程及热处理过程中的一些改进的措施。

关键词(KeyWords)： 60Si2CrVA弹簧;断口;海洋环境;热处理工艺

Abstract:

Keywords:

基金项目(Foundation): 北京市腐蚀、磨蚀与表面技术重点实验室和北京市教委共建项目(SYS100080419)

作者(Author): 张乐,连勇,高文,张津

DOI: 10.13289/j.issn.1009-6264.2016.04.026

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