Wear properties and mechanism of 10Mn steel and NM500 under different impact loads
WANG Tao1,2, HU Feng1,2,3, ZHANG Zhi-cheng4, PAN Xian-ming4, CHEN Kang-yan1,2, WU Kai-ming1,2,3,5
1. Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 2. International Research Institute for Steel Technology, Wuhan 430081, Hubei, China; 3. Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 4. Daye Special Steel Co., Ltd., Huangshi 435001, Hubei, China; 5. Metals Valley and Band (Foshan) Metallic Composite Co., Ltd., Foshan 528000, Guangdong, China
Abstract：Wear properties and mechanisms of different microstructures were studied to provide reliable experimental basis for actual use environment of different types of wear-resistant steel. Impact wear properties of NM500 martensitic steel and 10Mn austenitic steel were tested under low load of 2 J and high load of 5 J respectively. In NM500 martensitic wear-resistant steel, lath martensite was dominant, and there were high-density dislocation substructures and some rod-shaped carbides (TiC) in the lath; Austenitic 10Mn wear-resistant steel was mainly composed of austenite, a small amount of martensite and carbide (NbC, VC). The results showed that under low impact load (2 J), the wear resistance of NM500 was higher than that of 10Mn steel (109 and 181 mg in 160 min, respectively), which was attributed to the higher hardness of NM500 than that of 10MN steel and the less damage of abrasive to the surface. Under high impact load (5 J), the wear resistance of NM500 was higher than that of 10Mn steel (140 and 145 mg in 120 min, respectively) at the initial wear stage, but lower than that of 10Mn steel (222 and 173 mg in 160 min, respectively) after long-term wear, which was attributed to the full work hardening of 10Mn steel and better wear resistance. There were a lot of high-density dislocations, deformation twins and strain martensite in the worn sub surface microstructure of 10Mn steel. The excellent work hardening ability makes 10Mn steel more wear-resistant under 5 J impact load.
王涛, 胡锋, 张志成, 潘先明, 陈康彦, 吴开明. 不同冲击载荷下10Mn钢和NM500的磨损性能及机理[J]. 中国冶金, 2021, 31(12): 47-54.
WANG Tao, HU Feng, ZHANG Zhi-cheng, PAN Xian-ming, CHEN Kang-yan, WU Kai-ming. Wear properties and mechanism of 10Mn steel and NM500 under different impact loads[J]. China Metallurgy, 2021, 31(12): 47-54.
Niko Ojala,Kati Valtonen,Vuokko Heino,et al. Effects of composition and microstructure on the abrasive wear performance of quenched wear resistant steels[J].Wear,2014,317(1/2):225.
2021, Vol. 31 
