摘要
用应变电测法测出了锤击的Ｆ－ｔ曲线及锤击力大小，以此为基础探讨了锤击对焊缝施加影响的机制，焊后在θｐ 以上的锤击，使铸态焊缝经受“铸—锻”联合加工，可显著改善组织形态，减少显微缺陷，增加位错密度和亚晶界，使韧度和强度指标分别提高３０％ 和１５％ ，但锤击不当亦可产生较大的负面作用。
F t curve for peening and peening force is surveyed by strain electric methods. Post weld peening above θ p 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.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1999年第6期66-69,共4页
Journal of Mechanical Engineering
基金
山东省科技发展计划资助
关键词
冷焊
锤击
焊接修复
高硬度焊缝
应力
Cold welding Peening Welding recondition High hardness welds
