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超大规格300M钢棒超声波探伤及缺陷分析
盛伟1, 史丽军1, 赵选杰2, 刘天琦1, 王瑞3
1.中国航发北京航空材料研究院, 北京 100095;2.中国二重德阳万航模锻有限责任公司, 德阳 618000;3.抚顺特殊钢股份有限公司, 抚顺 113001
摘要:
Φ450 mm规格的300M钢棒材进行了超声波探伤,采用2.5 MHz软膜探头可以保证探伤的灵敏度并降低噪声水平。通过宏观、显微观察和能谱分析等手段对探伤缺陷进行了分析。结果表明:探伤缺陷处存在氧化铝、氧化镁和氧化钙复合夹杂物,单个夹杂物最大尺寸可达100 μm。该缺陷属于熔炼过程中引入的外来夹杂物,对材料性能有不利的影响。
关键词:  超声波检测  300M钢  夹杂物
DOI:10.12044/j.issn.1007-2330.2017.01.017
分类号:TG115.28
基金项目:
Ultrasonic Detection and Defects Analysis of Large Size 300M Steel Bars
SHENG Wei1, SHI Lijun1, ZHAO Xuanjie2, LIU Tianqi1, WANG Rui3
1.AECC Beijing Institute of Aeronautic Materials, Beijing 100095;2.National Erzhong Group Deyang Wanhang Die Forging Co. Ltd, Deyang 618000;3.Fushun Special Steel Group, Fushun 113001
Abstract:
The 300M steel bars with diameter of 450 mm were inspected by ultrasonic method. 2.5 MHz soft probe was used to ensure ultrasonic sensitivity and reduce the noise level. Macro- and micro-observations as well as electrical diffraction spectrum analysis were carried out to inspect interior defects of a material. The results showed that inclusions found by ultrasonic detection were consisted of Al2O3,MgO and CaO. The largest size of the inclusions was over 100 μm. These inclusions were imported by melting process, and they were detrimental to properties of the material.
Key words:  Ultrasonic detective  300M steel  Inclusion