【摘要】 报导了具有I、U、双U和V型四种坡口形式对7mm的45CrNiMoV高强度钢板材对接焊缝性能影响的研究。结果表明,坡口形式对焊缝性能有明显影响。V形的焊缝强度最高,双U型的焊缝韧性最高。当焊接强度处于1250～1330MPa之间时,焊缝的韧性最高。更多还原

【Abstract】 The effects of groove shapes of I,U .double U and V on weid mechanical properties of high strength steel 45CrNiMoV in 7mm thick was investigated. The results show that groove shapes markedly influence the properties of weld. The strength of the weld with V groove is the highest and so is the highest toughness of the weld with double U groove. When ultimate strength is at 1250~1300MPa the toughness of the weld is at its maximum.更多还原