用铸造法制备铁基表面复合材料时温度场的测试研究

Thermal Field Measurement and Investigation During Preparing Iron-Base Surface Composite Material with Castmg Process

对铸件本体和复合材料层进行了温度场的测试及研究,从测试所得的数据作出了复合层内部温度随时间的变化曲 线。试验结果表明,采用铸造法制备铁基表面复合材料时,复合层的烧结以及层内化学反应的发生是金属液温度下降所释 放热作用的结果;同时,复合层烧结后得到的组织在很大程度上受到工艺因素的影响,如浇注温度、冷却速度等。

The thermal field measurements and investigations were conducted in both the casting prop-er and the composite material layer. Based on the measurement data, the curve reflecting the change of temperature inside the composite layer with time was drawn. The experiment result showed that, when preparing iron-base surface composite material with casting process, the sintering of the composite layer as well as the occurring of chemical reactions inside layer were the results from the heat-re-leasing due to the temperature decreasing of the liquid metai; and , at the same time, the structures of the composite layer obtained after sintering were, to a great extent, influenced by some process factors, such as pouring temperature, cooling rate etc.