10Ni5CrMoV钢错位同步双面双弧焊接接头抗低温脆断性能  

Low temperature brittle fracture resistance of asymmetrical synchronous double-sided arc welded joint of 10Ni5CrMoV steel

作　　者：刘露[1] 王加友[1] 李大用[2] 张广军[2] 

机构地区：[1]江苏科技大学江苏省先进焊接技术重点实验室,镇江212003 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《焊接学报》2016年第8期109-113,134,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51175119;51575133)

摘　　要：采用系列温度冲击试验、动态撕裂(dynamic tear,DT)试验和落锤试验研究了10Ni5Cr Mo V钢错位同步双面双弧焊接接头的抗低温脆断性能.结果表明,10Ni5Cr Mo V钢双面双弧焊接接头抗脆性转变能力满足服役要求.双面双弧焊接接头的熔合线位置的冲击吸收功满足10Ni5Cr Mo V钢焊接接头Akv(-50℃)≥47 J的技术指标要求,且余量较大;-1℃时焊接接头动态撕裂能最低值为1 150 J,高于配套焊接材料0℃时DT功大于644 J的要求;落锤试验确定10Ni5Cr Mo V钢焊缝金属无塑性转变温度(nil-ductility temperature)为-80℃,焊缝的弹性断裂转变温度fracture transtiton of elastic(FTE)为-47℃,全塑性断裂转变温度farcture transition temperature(FTP)为-14℃.Low temperature brittle fracture resistance of asymmetrical synchronous double-sided arc welded( DSAW) joint of 10Ni5 CrM oV steel was investigated by series temperature impact test,dynamic tear test and drop hammer test. The results show that DSAW joints of steel 10Ni5 CrM oV have a practicable brittle fracture resistance. The impact energy value on the fusion line of DSAW joint meets the technical requirement of the10Ni5 CrM oV steel( i. e.,Akv(-50 ℃ ≥47 J) with a large allowance. Minimum of dynamic tearing energy at-1 ℃ is 1150 J,higher than the standard of 644 J DT work at 0 ℃. Drop hammer test determines that the nil-ductility transition temperature of weld metal of 10Ni5 CrM oV steel is-80 ℃,elastic fracture transition temperature is-47 ℃,full plastic fracture transition temperature is-14 ℃.

关 键 词：10NI5CRMOV钢 低温韧性 双面双弧 

分 类 号：TG457[金属学及工艺—焊接]