标准A型试片
Standard type a test piece
A型灵敏度试片由日本无损检测学会提出，以后为多个国家使用，主要用于零部件的磁粉探伤，在检查中，对几何形状复杂，不同材质的工作，可以正确地选择磁化规范，并可检查探伤设备，磁粉和磁悬液的性能，在磁粉探伤操作过程中，可以避免漏检，正确地知道探伤工作所需的电流峰值和方向，并对显示缺陷的磁场强度有所估量A型灵敏度试片是磁粉探伤工作者的调试工具。
Type A sensitivity test piece * was first proposed by Japan Nondestructive Testing Society and will be used in many countries in the future. It is mainly used for magnetic particle inspection of parts. During inspection, magnetization specifications can be correctly selected for work with complex geometry and different materials, and the performance of inspection equipment, magnetic powder and magnetic suspension can be checked. During magnetic particle inspection operation, omission can be avoided, current peak value and direction required for inspection work can be correctly known, and magnetic field strength showing defects can be estimated. Type A sensitivity test piece is a necessary debugging tool for magnetic particle inspection workers.
特 点（Special points）：
试片用于磁粉显示，图象直观，使用简便。对各类零件所有方向的磁场，尤其检查形状复杂的零件时，表现其的优点。
The test piece is used for magnetic powder display. The image is intuitive and easy to use. For magnetic fields in all directions of all kinds of parts, especially for parts with complicated shapes, it shows its unique advantages.
