(EN) Provided is a surface property inspection method for non-destructively determining whether heat treatment has been appropriately carried out on a steel product that has been subjected to surface treatment. A surface property inspection device is used that is provided with: an AC bridge circuit; an AC power supply for supplying AC power to the AC bridge circuit; and an evaluation device for, on thebasis of the output signal from the AC bridge circuit, evaluating the surface properties of a specimen under inspection that is a steel product that has had surface treatment including heat treatmentapplied thereto. AC magnetism is excited in the coils of a reference detector and inspection detector included in the bridge circuit so as to induce eddy currents in a reference specimen and the specimen under inspection, and an electromagnetic characteristic of the specimen under inspection in a state where the reference detector detects a reference state is output as a first output signal. At that time, the evaluation device compares the first output signal with a first threshold and evaluates the degree of heat treatment of the specimen under inspection.
(ZH) 提供一种以非破坏性方式进行是否对实施了表面处理的钢材产品适当地进行了热处理的表面特性检查方法。使用一种表面特性检查装置，具备：交流桥电路；交流电源，其对所述交流桥电路供给交流电力；以及评价装置，其基于来自所述交流桥电路的输出信号，对实施了包括热处理的表面处理的作为钢材产品的被检体的表面特性进行评价。在桥电路中包含的基准检测器和检查检测器各自的线圈中激励出交流磁场，来在基准检查体和所述被检体中分别激发出涡电流，并且将所述基准检测器检测出基准状态的状态下的所述被检体的电磁特性作为第一输出信号进行输出。此时，通过评价装置将第一输出信号与第一阈值进行比较，来评价被检体的热处理的程度。
