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铌是形成碳化物的活泼元素。在奥氏体钢中铌能阻止和缓和冷却过程以及650℃敏化温度保温时析出碳化铬,以免晶间产生局部贫铬现象。为了介绍不同铌含量对奥132焊缝金属性能的影响,用改变铌铁含量的方法配制了十多种焊条,这些焊条的焊缝金属性能对比见表1。由于1可知,除铌以外,各主要元素的含量均符合国标规定,而碳、硫、
Niobium is an active element that forms carbides. In austenitic steel niobium can prevent and ease the cooling process and the temperature of 650 ℃ sensitization temperature precipitation chromium carbide, in order to avoid the occurrence of local chromium between the phenomenon of chromium. In order to introduce the influence of different niobium content on the properties of Austrian 132 weld metal, more than ten kinds of welding rods were prepared by changing the content of niobium. The welding metal performance of these welding rods is shown in Table 1. As we can see, in addition to niobium, the content of the major elements are in line with national standards, and carbon, sulfur,