基于VB的凸轮片表面硬度涡流检测  

Surface Hardness Test of Campieces by Eddy Current Based on VB

作　　者：侯怀书[1] 吴斌[1] 张锁怀[1] 

机构地区：[1]上海应用技术学院机械工程学院,上海201418

出　　处：《理化检验（物理分册）》2012年第12期793-796,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：利用VB编写检测程序,设计分别与待测凸轮片凸圆和基圆耦合良好的涡流探头,选择3件经过高频感应淬火处理的不同硬度的球墨铸铁凸轮片进行硬度测试。结果表明:该涡流检测仪能够精确检测球墨铸铁凸轮片的硬度,与洛氏硬度计检测结果的对比表明其检测精度可达到±1.5HRC;金相分析结果表明显微组织的不同是导致该3个凸轮片感应淬火层表面硬度高低不同的根本原因。By programming the eddy current test based on VB and designing two eddy current probes which couple well respectively with the gibbous circle and base circle of the campieces, the hardness of three high- frequency induction quenched nodular cast iron campieces with different surface hardness were tested. The results show that the test precession of the eddy current tester could be ±1. 5 HRC according to the test results of Rockwell hardness tester. The metallographic examination results indicate that the difference of microstructure led to the difference of quenched case surface hardness of the three campieces.

关 键 词：涡流检测 凸轮片 探头 表面硬度检测 高频感应淬火 

分 类 号：TG115.28[金属学及工艺—物理冶金]