考虑到镍、钛、硼对２２５ Ｃｒ Ｍｏ 、１５ Ｃｒ Ｍｏ Ｖ 等 Ｃｒ Ｍｏ 钢焊接热影响区冷裂敏感性的影响，进行了插销试验。由试验结果可以看出，加入适量的镍、钛、硼元素，能提高 Ｃｒ Ｍｏ 钢焊接热影响区的插销试验临界断裂应力σｃｒ 。 Considering the influence of nickel, titanium and boron on the cold cracking susceptibility of heat-affected zone of 225 CrMo, 15 CrMo and other Mosteel welding, the bolt test was carried out. From the test results, it can be seen that the addition of proper amount of nickel, titanium and boron can increase the critical fracture stress σcr of the bolt test in heat-affected zone of CrMo steel.