Abrasive Wear Resistance of Dual Phase Steels DP980 and DP600

The abrasive wear resistance of dual phase (DP) steels DP980 and DP600 was investigated by using an ASTM rubber wheel abrasion tester. At 2. 40 m • s−1 sliding speed under 19. 9 N load with 180—355 μm abrasive sands, the wear rates of DP980 and DP600 were 1. 01×10−11 and 0. 86×10−11 m3 • m−1, respectively, corresponding to about 1. 9 and 2. 3 times of the relative wear resistance of normal low-carbon steel ASTM A283C. Using directly water quenching from austenitic temperature, the abrasive wear resistance of DP980 samples under 19. 9 N load could be improved by 1. 65 times. The wear rates of DP980 and DP600 samples decreased respectively with increasing sliding speed and abrasive particle size and decreasing applied load. The experimental results reveal that the effect of martensite on the wear resistance not only depends on the volume fraction but also depends on the morphology, distribution and grain size.