王会强,邢艳秋,孙维连,董婷婷,罗兆伟

• 1:河北农业大学机电工程学院

摘要(Abstract)：

针对空冷器用低碳10钢管扩孔过程中产生的开裂,借助直读光谱仪,SEM、EDS和OM等设备对开裂钢管原材料的化学成分,显微组织和物相进行分析,并测试原材料的力学性能(抗拉强度、屈服强度和伸长率)。结果表明,在开裂钢管断口附近存在大量非金属夹杂物,显微组织中在铁素体晶界处存在较多未溶的渗碳体,导致钢管的脆性增大、韧性降低,直接引起钢管在扩孔过程中产生开裂。通过严格控制原材料品质,降低10钢管在正火热处理过程中的冷却速度,可以避免10钢管在使用中产生开裂。

关键词(KeyWords)： 空冷器;低碳10钢管;开裂;渗碳体

Abstract:

Keywords:

基金项目(Foundation): 河北农业大学青年科学基金(LG20120102);; 河北省科技计划项目(12227209)

作者(Author): 王会强,邢艳秋,孙维连,董婷婷,罗兆伟

DOI: 10.13289/j.issn.1009-6264.2014.03.013

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