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对１６Ｍｎ钢不同组配焊接接头的断裂性能和断裂行为进行了试验研究。认为在高应力塑性断裂和高应力脆性断裂状态下，１６Ｍｎ钢接头的断裂强度为焊缝强度和接头各部分塑性变形能力所决定，提高焊缝强度以及提高焊缝和母材的塑性均有利于提高接头的抗断裂能力；在低应力脆性断裂状态下，接头的抗断裂性能是可以根据焊缝的低温冲击韧度进行评价的。焊接接头各部分塑性变形能力及其相互关系对焊接接头的断裂行为具有不可忽视的影响，是评价接头断裂性能的重要依据。
The fracture behavior and fracture behavior of different assembly welded joints of 16Mn steel were studied. It is considered that the fracture strength of 16Mn steel joint under high stress plastic fracture and high stress brittle fracture is determined by the strength of weld and the plastic deformation ability of each part of joint. Increasing the strength of weld and increasing the plasticity of weld and base metal are both beneficial Improve joint anti-fracture ability; in the low-stress brittle fracture state, joint fracture resistance can be evaluated according to the low temperature impact toughness of the weld. The plastic deformability of each part of welded joint and its interrelation have an unnegligible influence on the fracture behavior of welded joint, which is an important basis for evaluating the fracture performance of joint.