低溫鋼09MnNiDR板材，厚度24mm,鋼板為正火狀態，其化學(xue)成(cheng)分及力(li)學(xue)性能(neng)見表(biao)5-49和表(biao)5-50.

 埋弧自動焊(han)(han)(han)(han)試驗，選用(yong)(yong)焊(han)(han)(han)(han)材：焊(han)(han)(han)(han)絲CHW-SG,直徑4mm;焊(han)(han)(han)(han)劑CHF105.焊(han)(han)(han)(han)接環境為(wei)：室溫23~28℃;相對濕度(du)62%~69%.焊(han)(han)(han)(han)接采用(yong)(yong)直流反接，V形坡口，多(duo)層多(duo)道焊(han)(han)(han)(han)，熱(re)輸入2326kj/cm,道間溫度(du)50℃.焊(han)(han)(han)(han)后(hou)按GB150-1998及JB/T4709-2000要求進行焊(han)(han)(han)(han)后(hou)消除應力(li)熱(re)處理。焊(han)(han)(han)(han)縫及熔敷金屬化學成分見(jian)表5-51;接頭力(li)學性(xing)能見(jian)表5-52。