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在万能材料试验机上采用控温模具对柱状晶CuAlBe合金进行等温压缩变形试验,研究不同变形温度、变形量和变形速率下发生动态再结晶的行为和析出物含量;对变形后的合金重新加热,研究其发生静态再结晶的温度和析出物含量。结果表明:在550℃等温变形,变形量大于20%都发生动态再结晶,450℃以下变形都不发生动态再结晶,但此温度下易形成马氏体和裂纹;在此温度区间,随着变形温度的降低或变形速率的增加,发生动态再结晶所需的变形量逐渐增大。发生静态再结晶的临界温度为610℃,再结晶前的析出物随变形温度的升高而增加,析出物的含量随动态再结晶的进行而降低。
In a universal testing machine, the temperature controlled mold was used to carry out isothermal compressive deformation test of columnar crystal CuAlBe alloy to study the dynamic recrystallization behavior and precipitate content under different deformation temperature, deformation rate and deformation rate. The alloy was reheated after deformation, The static recrystallization temperature and the content of precipitates were investigated. The results show that the dynamic recrystallization occurs when the deformation is greater than 20% at 550 ℃, and no recrystallization occurs at the temperature below 450 ℃, however, martensite and cracks are easily formed at this temperature. With this temperature range, As the deformation temperature decreases or the deformation rate increases, the amount of deformation required for dynamic recrystallization gradually increases. The critical temperature at which static recrystallization occurs is 610 ° C. The amount of precipitates before recrystallization increases with the deformation temperature, and the content of precipitates decreases with the progress of dynamic recrystallization.