High-hardness shot material for shot peening and shot peening method

摘要

A high hardness, high toughness and inexpensive shot material for shot peening is provided. The high-hardness shot material for shot peening comprises, in mass %, 5 to 8% of B; 0.05 to 1% of C; 0 to 25% of Cr; balance Fe and inevitable impurities. B and C are contained in a total amount of 8.5% or less.

主权项

1. A high-hardness shot material for shot peening comprising in mass %:
B: 5 to 8%; C: 0.05 to 1%; Cr: 0 to 20 %; balance Fe and inevitable impurities, and having a hypereutectic structure comprising an iron-based solid solution phase and an Fe2B phase, wherein Fe is contained in an amount of 71.9 mass % or more, and B and C are contained in a total amount of 8.5% or less.