本文系应用locati方法对渗碳和碳氮共渗材料进行接触疲劳极限快速测定的试验总结.此方法只用一对试件,采用台阶加荷方式,仅花两、三个小时的时间,一次测出疲劳极限,与常规方法相比,效率可提高数十倍.对不同渗层深度的八对试样进行快速试验的结果表明:所测出的接触疲劳极限值与常规方法的结果相当接近,相对误差均小于5%. In this paper, we use the locati method to test the contact fatigue limit of carburizing and carbonitriding materials. This method uses only one pair of test specimens, using step loading method, only takes two or three hours, The fatigue limit can be measured and the efficiency can be increased by several tens times compared with the conventional method.The rapid test results on eight pairs of specimens with different depths show that the measured contact fatigue limit values ​​are quite close to those of the conventional method , The relative errors are less than 5%.