矿用JR126-8电动机轴的材料一般为优质碳素结构钢(45钢),它具有强度高、韧性好等优点。但由于合金元素的增加,使钢材的焊接性变差,焊接时淬硬倾向是其重要特点之一,焊接裂纹与脆化成为影响质量的重要因素。 Mine JR126-8 motor shaft material is generally high-quality carbon structural steel (45 steel), which has the advantages of high strength, good toughness. However, due to the increase of alloying elements, the weldability of the steel deteriorates and the tendency of hardenability during welding is one of the important features. Welding cracks and embrittlement are important factors affecting the quality.