【摘要】：研究了冷加工變形量、退火溫度和退火時(shí)間對(duì)617B合金管材組織及力學(xué)性能的影響。結(jié)果表明:隨著變形量的增大,晶粒沿著最大主變形方向被拉長(zhǎng),形成了長(zhǎng)條狀的形變帶,合金室溫抗拉強(qiáng)度和屈服強(qiáng)度逐漸提高,延伸率下降;當(dāng)退火溫度從1080℃提高到1160℃時(shí),隨著退火溫度的提高,合金的晶粒逐漸長(zhǎng)大,抗拉強(qiáng)度和屈服強(qiáng)度降低,塑性提高,退火溫度到1160℃以上繼續(xù)提高溫度,晶粒長(zhǎng)大速度明顯增大,強(qiáng)度和塑性變化不大;不同變形量下合金晶粒長(zhǎng)大的激活能Q均遠(yuǎn)大于純Ni的自擴(kuò)散激活能,且Q值隨著變形量的增加先升高后降低;合金晶粒長(zhǎng)大指數(shù)η值隨著退火溫度的提高先增大后減小。
[Abstract]:The effects of cold working deformation, annealing temperature and annealing time on the microstructure and mechanical properties of 617B alloy pipe were studied. The results show that with the increase of the amount of deformation, the grain is elongated along the direction of maximum main deformation, forming a long strip deformation band. The tensile strength and yield strength of the alloy at room temperature increase gradually, and the elongation decreases. With the increase of annealing temperature from 1080 鈩，

本文編號(hào)：2397017