等温变形参数对柱状晶CuAlBe合金再结晶的影响
Influence of isothermal deformation parameters on recrystallization of columnar crystal CuAlBe alloy
赵仙兰，蔡莲淑，余业球，黎沃光
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作者单位：广东工业大学
中文关键字：CuAlBe；柱状晶；等温变形；动态再结晶；静态再结晶；析出物
英文关键字：CuAlBe；columnar crystal；isothermal deformation；dynamic recrystallization；Static recrystallization；precipitation
中文摘要：在万能材料试验机上采用控温模具对柱状晶CuAlBe合金丝进行等温压缩变形试验，研究不同变形温度、变形量、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，但此温度下容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着变形温度的增加而增加；析出物的含量随着动态再结晶的充分而减少。
英文摘要：The isothermal compression experiment of columnar crystal CuAlBe wires was carried out with a
temperature controlled mould on the universal testing machine to study its dynamic recrystallization and precipitation of γ2 phase in the different temperature，deformation and strain rate. Static recrystallization temperature and precipitation of γ2 phase were also investigated by reheating the alloy after deformation. The results indicate that dynamic recrystallization occurred in 550 ℃ when the deformation reached more than 20%. Martensite and crack formed below 450 ℃ , though dynamic recrystallization did not occur in this temperature. Dynamic recrystallization deformation gradually increased with the decrease of the temperature or the increase of the strain rate in the range of 450-550 ℃. Static recrystallization temperature is 610℃. The content of γ2 phase gradually increased with the increase of the deformation temperature before recrystallization, once dynamic recrystallization occurred, the content of γ2 phase decreased with more adequate proceeding of dynamic recrystallization.