| 40CrNi2Si2MoVA钢制零件磁痕显示分析 |
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| 引用本文： | 王瑞,刘天琦.40CrNi2Si2MoVA钢制零件磁痕显示分析[J].失效分析与预防,2006,1(2):53-55. |
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| 作者姓名： | 王瑞 刘天琦 |
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| 作者单位： | 1. 东北特殊钢集团有限责任公司技术中心,抚顺,113100
2. 北京航空材料研究院,北京,100095 |
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| 摘 要： | 本文采用磁粉、X射线、CT和超声等无损检测和金相分析等方法对40CrNi2Si2MoVA钢制零件的磁痕显示进行了系统分析.研究认为,40CrNi2Si2MoVA钢制零件的磁痕显示为显微成分沿变形方向偏析导致的马氏体转变点Ms差异所致.显微成分偏析是钢锭结晶过程中不可避免的,但可通过优化熔炼工艺参数降低显微偏析的程度.本文还分析了四种磁痕显示的类型及其判别方法.
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| 关 键 词： | 40CrNi2Si2MoVA 磁痕显示 显微偏析 |
| 文章编号： | 1673-6214（2006）02-0053-03 |
| 收稿时间： | 2006-02-17 |
| 修稿时间： | 2006-02-172006-03-02 |
Magnetic Particle Indications Analysis of 40CrNi2Si2MoVA Steel Parts |
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| WANG Rui,LIU Tian-qi.Magnetic Particle Indications Analysis of 40CrNi2Si2MoVA Steel Parts[J].Failure Analysis and Prevention,2006,1(2):53-55. |
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| Authors: | WANG Rui LIU Tian-qi |
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| Affiliation: | 1 Dongbei Special Steels Group Go., Ltd Technic Centre, Fushun 113100, China; 2 Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | Magnetic particle indications appeared on 40CrNi2Si2MoVA steel parts were studied systematically by magnetic particle, X - ray radiographic, CT, ultrasonic testing and metallography inspection. The magnetic particle indication is caused by the Ms difference because of micro segregation of elements occurring along the grain flow. Micro segregation of dements is inevitable during crystallization of ingot, which can be reduced by optimizing technical parameters. Four types of magnetic particle indications and their distinguishing criteria are intrdueed in this paper. |
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| Keywords: | 40CrNi2Si2MoVA steel magnetic particle indications micro segregation |
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