HG50钢焊接接头疲劳特性  

Fatigue characteristic of HG50 steel welded joint

作　　者：孙静涛[1] 韩英[1] 李小宇[1] 

机构地区：[1]哈尔滨焊接研究所,哈尔滨150080

出　　处：《焊接学报》2004年第3期89-92,共4页Transactions of The China Welding Institution

摘　　要：通过对国产HG5 0钢焊接接头疲劳性能的试验研究 ,建立了HG5 0钢焊接接头S -N曲线和应变 -寿命 (Δε -Nf)曲线。当Nf>1 0 5周次时 ,疲劳寿命主要决定于弹性应变Δεe,为弹性损伤为主的疲劳寿命 ,即进入高周疲劳寿命区。低周疲劳及高周疲劳的疲劳寿命随循环应力变化的速率不同 ,即二者的疲劳特性不同。The curves of S-N and strain-life(Ae-Nf) of HG50 steelwelded joint were investigated. The fatigue life mainly depends on elastic-ity strain ABe in Nf > 105 times and belongs to high-cycle fatigue life thatthe elastic destruction is primary. The fatigue characteristic is differentwith the different cycle stress-life rate in low-cycle and high-cycle. Thebasic data are offered for fatigue-resistant design of welded structures.

关 键 词：HG50钢 焊接接头 低周疲劳 高周疲劳 

分 类 号：TG405[金属学及工艺—焊接]