含铌中铬耐磨铸钢的摩擦磨损行为

张拓,滕铝丹,臧其玉,杨弋涛

Friction and Wear Behavior of Niobium Alloyed Medium Chromium Wear-resistant Cast Steel

Tuo ZHANG,Lvdan TENG,Qiyu ZANG,Yitao YANG

表3 试验钢的硬度、碳化物和晶粒尺寸随Nb含量的变化

Table 3 Hardness, carbide, grain size of test steel with different Nb content

Nb content /mass fraction, % 0 0.2 0.5 Hardness/HRC 57.3 57.5 57.6 Carbide content/% 2.2 2.5 2.9 Main type of carbide (Cr,Fe)7C3 NbC NbC Average grain size/μm 35.0 16.7 17.3