Microstructure evolution and mechanical properties of high-boron steel with different ratios of boron and carbon

Boron and carbon contents are the main factors influencing properties of high-boron steel. In this study, experimental samples with different boron-to-carbon ratios (%B/%C) were prepared. The microstructures observed, their hardness, bending strength, impact toughness investigated. Results show that in investigated steel eutectic Fe2B structure a fishbone shape ternary peritectic Fe3(C, B) chrysanthemum shape. When boron content is 2.5wt.% 0.43wt.% (i.e., %B/%C=5.82), overall mechanical alloy best. alloy’s strength reach maximums, which 67.3 HRC, 1,267.36 MPa 6.19 J·cm-2, respectively. optimized compared conventional materials exhibiting excellent wear resistance (namely, high-manganese high-chromium cast iron) through two-body three-body abrasion tests. steelinvestigated work found to be superior those more common materials.