关键词: 锤击, 高硬度焊缝, 焊接修复, 冷焊, 焊接, 镍基高温合金, 强度, 钛铝系合金, 组织

Abstract: F-t curve for peening and peening force is surveyed by strain electric methods. Post-weld peening above φp, exerted a "casting-forging" unitized working on welds, which improved the microstructure morphology, decreased the amount of micro-defects and increased dislocation density and subcrystalline boundary, then improved the toughness and strength by 30% and 15% respectively. But if the welds were peened improperly, contrary effect would be caused.

Key words: Cold-welding Peening, High hardness welds, Welding recondition, Joining, Microstructure, Nickel-based superalloys, Strength, Titanium aluminides