我厂模锻件冲刺所用的热切边凹模是采用刃口堆焊制造的,在凹模刃口堆焊中不易解决的是刃口塌坡向题(见图1)。由于刃口的塌坡给下道机加工带来许多困难,且费工费时。为了解决这个问题,我们最初是采用耐火泥做芯子,来阻挡焊接熔池金属,以避免出现塌坡。但由于耐火芯子寿命低,易掉块,所 I die forging plant sprue used in the edge concave die is used to create edge welding, die edge surfacing is not easy to solve the edge of the slope to the problem (see Figure 1). As the edge of the slope down to the road machining brings many difficulties, and time-consuming work. In order to solve this problem, we initially use refractory mud as a core to block the weld pool metal to avoid slope collapse. However, due to low life refractory core, easy to block, the