磁痕

300M钢锻制飞机起落架非相关磁痕的剖析研究

Analysis on indications in 300M steel forged landing gears

采用交、直流磁粉检验并结合金相试验、电子探针试验及微量元素含量分析的方法，对300M钢磁痕现象的本质进行了分析。

Alternating and direct current wet continuous magnetic particle inspection ( MPI ) methods , combined with metallographic examination and trace element microanalysis method , were used to determine the nature of the 300M steel magnetic particle indications .

汽轮机动叶片磁粉探伤伪磁痕现象分析

Analysis of the fake magnetic during the magnetic inspection of steam turbine

球墨铸铁曲轴磁痕缺陷的研究

A Study on Defects of Nodular Iron Crankshafts Detected by Magnetic Testing

工件表面点状缺陷磁痕的形状和大小

Shape and dimension of the magnetic particle indications of point-type defects on workpiece surface

工件表面键槽棱角旁的放射状磁痕

The Radiated Magnetic Particle Pattern Near the Corners of a Key Slot on Workpiece Surface

带通孔销钉圆柱面上的奇特磁痕

Strange Magnetic Particle Pattern over the Cylindrical Surface of a Pin with a Through Hole

汽轮机叶片围带焊接后进行磁粉探伤时出现伪磁痕，造成焊接区存在裂纹的假象和误判。

This paper briefly introduces the misjudgement of welding cracks in turbine blade shroud bands .

磁力探伤器用的退磁器机车牵引电机转轴探伤磁痕的分析与处理

Analysis and Treatment of the Magnetic Mark of the Defect in the Traction Motor Axle of the Locomotive

受力分析在机车牵引电机转轴探伤磁痕判别中的应用

Application of Mechanics Analysis in Differentiating the Magnetic Mark of Magnetic Particle Inspection of the Traction Motor Axle of the Locomotive

通过对模拟和真实图像数据的仿真，表明该复原方法能够实现散焦磁痕图像复原，符合磁粉探伤系统的对裂纹识别要求。

The out-of-focus radius is proposed to evaluate quality of the restored image . Simulation results on synthetic and real images demonstrate that the restoration method satisfies the requirement of crack identification for magnetic particle testing system .

然而，实际锻造生产中经常会出现充不满、裂纹、折叠、变形、凹坑等缺陷，即使成形完整，也可能在磁粉探伤中显现出磁痕。

However , the forging productions of crankshaft often suffer sufficient dissatisfaction , cracks , folds , deformation , pits and other defects . Even if the shape of productions is complete , they may also appear magnetic marks during the magnetic particle inspection .