摘要
当采用涡流法检测铝硅合金活塞显微组织级别时,合金的含硅量、变质剂的加入量以及温度变化都将影响分级结果的准确性。分析了由以上因素引起的显微组织的分级误差,确定了含硅量不同时的修正因子,变质剂的加入量以及温度变化时的校核方式,并采用数理统计方法分析了测试的可靠性,最后得出该涡流检测的分级准确率可达99%。
When testing the microstructure grade of piston made of Al-Si alloy with eddy current method, the percentage of Si in the alloy, number of inoculum and enviromental temperature would affect the accuracy of grading. The grading error of microstructure caused by the factors upon were analyzed, the correction factor applied in different percentage of Si, adding number of inoculum and calibration during temperature altering were confirmed, and the reliability of the testing was analyzed by statistics. Results showed that the grading accuracy by eddy current method was upon 99%.
出处
《无损检测》
2004年第7期372-374,共3页
Nondestructive Testing
关键词
涡流检验
合金
显微组织
分级
误差分析
Eddy current testing
Alloy
Microstructure
Grading
Error analysis
