一、引言为确定铁素体对双相不锈钢焊件机械性能的影响已进行过很多研究[1—8],如:博兰[1]和赫尔[2]曾指出少量铁素体有利于改善奥氏体钢焊件的抗热开裂和显微开裂的性能。还曾研究过铁素体对双相焊件由敏化[4]造成的一般腐蚀[3]和晶间腐蚀敏感性的影响。最近巴斯拉克等[5—8]研究 I. INTRODUCTION Many studies have been conducted to determine the effect of ferrite on the mechanical properties of duplex stainless steel welds [1-8]. For example, Boland [1] and Hull [2] have pointed out that a small amount of ferrite is beneficial Improve austenitic steel weldment thermal cracking and micro-cracking performance. The effect of ferrite on general corrosion caused by sensitization [4] and the susceptibility to intergranular corrosion has also been studied. Recently Basilak et al [5-8] study