对于材质为42CrMo大型高精度无缝轨道焊接时,采用焊接改性层、填充层、堆焊层的焊接结构形式,通过预热、反变形、控制温度和焊后热处理等措施,可有效的确保焊缝质量,避免出现焊接裂纹,也可以有效的消除焊接应力,确保整个轨道的平面度,满足大型射电望远镜方位轨道的连续、高精度、高强度、高耐磨性的设计要求。 For 42CrMo large precision seamless rail welding, welding modified layer, filled layer, surfacing layer welding structure, through preheating, anti-deformation, temperature control and post-weld heat treatment and other measures can effectively ensure that Weld quality, to avoid welding cracks, but also can effectively eliminate the welding stress, to ensure the flatness of the entire track to meet the large radio telescope direction orbit of the continuous, high precision, high strength, high wear resistance design requirements.