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一、用途: -15焊条用来焊接在高温(600～650℃)高压下工作的由1X18H12T奥氏体钢制成的重要部件,如蒸汽管道、集气管等。同样,当焊缝需要有抗晶间腐蚀性时,也常常用来焊接1X18H9T的结构。二、对-15焊条的特殊要求: -15是奥氏体不锈钢焊条。要使焊缝金属有较好的抗热裂性和耐蚀性,就必须保证-15的焊缝金属中有1.5～5.0％的纯铁体。当用金相方法来确定焊缝中纯铁体的浓度时,必须在多层焊的上面一层进行。三、焊芯的选择:
First, the use of: -15 electrode for welding high-temperature (600 ~ 650 ℃) under the pressure of 1X18H12T austenitic steel made of important components, such as steam pipes, manifolds and so on. Similarly, when the weld needs to be resistant to intergranular corrosion, it is also often used to weld 1X18H9T structure. Second, the special requirements of the -15 electrode: -15 is austenitic stainless steel electrode. In order to make the weld metal have good resistance to hot cracking and corrosion, it is necessary to ensure 1.5 to 5.0% pure iron in the weld metal of -15. When using metallographic methods to determine the concentration of pure iron in the weld, it must be carried out on top of the multi-layer weld. Third, the choice of welding core: