耐烧蚀复合材料风帽制造方法研究

Study on Manufacturing Method of the Ablative Composite Material Hood

分析了金属熔炼与浇注工艺的关键操作技术和提高钢液纯洁度措施,采用消失模铸造工艺,在真空负压下,耐热不锈钢液渗透到硅石砂涂料砂粒间隙内,形成厚度2.0~2.5 mm金属和砂粒耐热烧结陶瓷层,并与风帽金属本体复合,研究了耐烧蚀复合材料风帽的制造方法。结果表明,耐烧蚀风帽在火电厂锅炉煤粉燃烧区使用寿命是金属风帽的1.3倍以上。

The key operation techniques of metal smelting and pouring process and measures to improve the purity of molten steel were analyzed.The EPC process was adopted,under vacuum and negative pressure,the heat resistant stainless steel liquid penetrates into the sand gap of silica sand coating to form a 2.0~2.5 mm thick metal and sand heat resistant sintered ceramic layer.The fabrication method of ablative composite hood was studied by combining with the metal matrix of the hood.The results show that the service life of ablative hood in pulverized coal combustion zone of power plant boiler was more than 1.3 times that of metal hood.