加热温度对铝-钢复合材料组织和性能的影响

研究了铝-钢复合材料经不同温度加热后组织和性能的变化。结果表明,在350℃以下温度加热复合界面基本上无变化,而在400℃以上温度加热复合界面上有FeAl金属间化合物生成,且化合物层的厚度逐渐增大;界面结合强度随加热温度升高呈下降趋势;350℃以上温度加热后,侧弯曲角度均达不到90°即发生界面开裂;高温拉脱强度在350℃时已降至爆炸态的10％以下。因此铝-钢复合材料的加热温度不要超过350℃,以防止界面化合物的生成,保证铝-钢复合材料的良好性能。

Effect of heating temperature on microstructures and properties of Al-sleel cladding material

The microstructure and properties of a Al - steel cladding material heat - treated at different temperatures areinvestigated. The results manifest that the microstructures of Al - steel interfaces change little at temperature below 350℃,and Fe - Al intermetallic compounds form on the interfaces while the temperature over 400℃. The thickness of the compoundsincreases and the interface bonding strength decreases as the heating temperature rising. When the bending angle reaches toless than 90°, a interface cracking will occur at temperature below 350℃. The high temperature tensile strength of the Al -steel cladding material decreases with the temperature rising, and reduces to less than 10% of the original strength. Theheating temperature shall be controlled to below 350℃ to prevent the formation of interface compound and keep the originalgood properties.