H13钢经不同表面处理后的静态抗铝热熔损性能比较

Comparison of Static Anti-Melting-Loss Ability of H13 Steel with Different Surface Treatment

将经过蒸汽氧化、离子渗氮和渗硼等不同表面处理的H13钢试样浸入铝液进行静态熔损试验 ,探索并建立了一套熔损评定方法—即用试样质量损失的方法评定熔损情况。对铁铝界面进行了显微观察和能谱分析。结果表明 ,在相同试验条件下熔损后 ,铁铝界面组织颜色自深至浅依次为 :深色的H13钢基体、深灰色致密金属间化合物层、浅灰色致密金属间化合物层、含游离金属间化合物的铝层以及附着的铝。离子渗氮试样和渗硼试样的热熔质量损失要比氧化试样更少 ,显示了更好的热熔损抗力。

Different surface treatments such as vapor oxidation treating,plasma-nitriding and boriding,were carried out on H13 steel specimens,then the specimens were immerged into the molten aluminum liquid and kept for several hours.The weight-loss method was developed to evaluate the samples anti-melting-loss ability in molten aluminum.We also investigated the microsturcture of the interface between the H13 matrix and aluminum with EDS and SEM.The results show that the samples interface,obtained under the same experimental condition,consist of the matrix,the deep gray intermetallic phase,the grayis intermetallic phase,the dissociated lossen big lump in aluminum and adhered aluminum layer.The plasma-nitrided and the boronized specimens show much better erosion resistance property in the experiments.