hard-faced

adj.

面貌严厉的，面貌难看的；

Earth-boring bit having an improved hard-faced tooth structure
Crack propagation in a hard-faced AISI type 304 stainless steel
Hard-faced glass fibre: synthesis and characterization
Theoretical and experimental estimation of the working life of machine parts hard faced with austenite-manganese electrodes
Determina¬tion of the cooling rate and its influence on the hard-faced forging dies properties
Influence of the Hard-Faced Layer Welded on Tangential-Rotary Pick Operational Part on to Its Wear Rate
Experimental Determination of Residual Stresses in the Hard-faced Layers after Hard-facing and Tempering of Hot Work Steels ☆
Effect of Molybdenum on Wear Resistance of Cr-Nb Hard-Faced S355JR Steel
Microstructural Examinations of Fe-W-B Base Hard-Faced Steel
Improving the fracture toughness and wear resistance of hard-faced hot-rolling-mill rolls