陶土对铸钢消失模涂料烧结性的影响

采用阿基米德法测试烧结试样密度,研究了陶土对铸钢消失模涂料烧结性的影响。结果表明,随着陶土含量和烧结温度的增加,试样体积密度都有增大趋势。陶土含量为5%时,试样在1550℃时密度显著增大,符合铸钢消失模涂料要求。另外,进行现场浇注试验,对涂片层断面进行扫描电镜分析,涂片层断面与钢水接触部分烧结良好,耐火骨料连成整片,阻止钢水进一步渗透,使涂料烧结壳从铸件表面自动剥离。

Effects of the Argil on Sintering Behavior of the Coating for Evaporated Pattern Casting (EPC) Cast Steel

Archimedes method was used to test the density of sintered samples,and the effects of the argil on sintering behavior of the coating for evaporated pattern casting(EPC) cast steel were investigated through measuring density of sintered samples by Archimedes method.The results show that with increasing in the argil content and in the sintering temperature,the volume density of the samples is increased.The volume density of the sample is increased significantly with 5% argil content at 1 550 ℃,meeting the requirements of the coating for evaporated pattern casting cast steel.The practical pouring experiment was conducted to verify the coating behavior.The coating layer cross-section was observed by scanning electron microscope(SEM).The results reveal that good sintering layer contacting with steel sintered can be observed,where refractory is aggregated into a whole piece to prevent the further penetration of molten steel,so that the coating easily stripped from the casting surface automatically.