氧化铝和浸渗液对粘结剂喷射成形钾基复合盐芯性能与收缩率的影响OA

The binder jetting(BJ)forming technology was used to prepare potassium chloride and potassium sulfate water-soluble composite salt cores,and the effects of alumina content and saturated solution infiltration on the flexural strength and dimensional shrinkage of the composite salt cores were studied,and their microstructure and reinforcement mechanism were analyzed.The results showed that with the increase of alumina content,the flexural strength and dimensional shrinkage of the composite salt core first increased and then decreased.When the alumina content was 40wt.%,the flexural strength of the composite salt core was the highest,reaching 10.66 MPa,and the dimensional shrinkage rate was 16.5%.After further infiltrating with a saturated salt solution,the flexural strength of the composite salt core sample with an alumina content of 40wt.%was increased to 10.92 MPa,and the dimensional shrinkage rate was reduced to 15.7%.The synergistic effect of alumina and infiltration solution is beneficial for regulating the performance and shrinkage rate of the potassium based composite salt cores formed by binder jetting,which can provide new ideas for the preparation of high-strength and low shrinkage soluble salt cores.