我厂生产的多层化肥容器系采用14Mn-MoVB 钢板,生产中发现在层板的纵焊缝中有横向裂缝存在,在每条焊缝中多则二十几条,少则3～4条,裂缝最长约40毫米,在多数情况下,裂缝存在于二层层板中间,并在下一层裂穿。以后对已生产出厂该材料制层板容器的最外面一层焊缝也作了超声波和磁粉探伤,同样发现有数量不等的横向裂缝存在,这些容器 The multi-layer fertilizers used in our factory are made of 14Mn-MoVB steel plate. In the production, there are horizontal cracks in the longitudinal welds of the laminates, as many as 20 or more in each weld, ranging from 3 to 4 , Cracks up to about 40 mm, in most cases, the cracks exist in the middle of the two layers, and the next layer of cracks. After the production of the factory has made the material layer of the outer layer of the container also made a weld ultrasonic and magnetic particle inspection, also found a number of horizontal cracks exist, these containers