Residual stress and distortion of welded specimens are issues when it comes to geometrical requirements. The surrounding material prevents the dilatation associated with transformation in the area of heat input resulting in residual stress and distortion due to thermal contraction. In the past few years, low transformation temperature (LTT) material was successfully used as filler wire to reduce residual stress as well as distortion in the weld seam in arc welding processes. High alloy Fe-based filler materials with levels of chromium and nickel ensure a martensitic transformation at reduced temperatures in a low alloy base material. The LTT properties counteract the accumulation of stresses due to thermal contraction with compressive stresses that develop within the transformed region. This work used a high alloy base material in combination with a low alloy filler wire resulting in a microstructure that shows the same properties as LTT weld metals. This in situ alloying allows for an alloy composition tailored to the process. In order to provide a point of reference, comparable welds were made using conventional high alloy filler wire. As a result, the distortion and longitudinal residual stress was significantly reduced compared to welding with conventional filler wire.

当涉及几何要求时，焊接试样的残余应力和变形是一个问题。周围的材料可防止与热输入区域的变形相关的膨胀，从而由于热收缩而导致残余应力和变形。在过去的几年中，低相变温度（LTT）材料已成功用作填充焊丝，以减少电弧焊过程中的残余应力以及焊缝中的变形。铬和镍含量高的高合金铁基填料确保了低合金母材在降低温度下的马氏体转变。LTT属性抵消了由于热收缩而在转换区域内产生的压缩应力引起的应力累积。这项工作将高合金基础材料与低合金填充焊丝结合使用，产生的显微组织显示出与LTT焊接金属相同的性能。这种原位合金化允许适合该工艺的合金成分。为了提供参考点，使用常规的高合金填充焊丝进行了可比较的焊接。结果，与使用传统填充焊丝的焊接相比，变形和纵向残余应力显着降低。