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通过铜钨合金在快速加热后水冷的热冲击实验,研究了材料在热冲击后的力学性能变化。另外,应用有限元方法分析了合金在热冲击过程中的温度及热应力的分布及变化。结果表明,随着热冲击次数的增加,材料的强度减小而韧性明显增加;热冲击中,最大热应力出现在加热及冷却阶段的开始时刻,多次热冲击过程中,材料的内部和外部承受着在拉应力与压应力之间相互转换的交变载荷。
Through the thermal shock experiments of copper-tungsten alloy after rapid heating, the mechanical properties of the material after thermal shock were studied. In addition, the distribution and change of temperature and thermal stress in the process of thermal shock were analyzed by finite element method. The results show that with the increase of the number of thermal shocks, the strength of the material decreases and the toughness increases obviously. In thermal shock, the maximum thermal stress occurs at the beginning of the heating and cooling phases. During the thermal shock, the material’s internal and external Bear the alternating load between tensile stress and compressive stress.