CAJ | 학술논문

研究了从820℃、900℃、980℃和1030℃水冷、空冷和炉冷对 TA15钛合金微观组织和硬度的影响。结果表明，随着加热温度的升高，初生等轴α相不断减少，亚稳定β相不断分解，形成细小的次生针状α相（αs ）；随着冷却速度的降低，合金的组织向针状和片状（α＋β）相转变。显微硬度随加热温度的升高而提高，而冷却方式对其硬度影响不大。
연구료종820℃、900℃、980℃화1030℃수랭、공랭화로랭대 TA15태합금미관조직화경도적영향。결과표명，수착가열온도적승고，초생등축α상불단감소，아은정β상불단분해，형성세소적차생침상α상（αs ）；수착냉각속도적강저，합금적조직향침상화편상（α＋β）상전변。현미경도수가열온도적승고이제고，이냉각방식대기경도영향불대。
Effect of cooling in water,air and furnace from 820 ℃、900 ℃、980 ℃ and 1030 ℃ respectively on microstructure and hardness of a TA15 titanium alloy was investigated.The results show that with the increase of heating temperature primary equiaxed αphase decreases,metastable βphase decomposes and forms fine secondary acicular αs phase,and that as the cooling rate becomes lower the microstructure of TA15 alloy transforms into acicular and lamellar(α+β)phase.In addition,the microhardness of TA15 alloy increases with the increase of heating temperature,but the cooling manners have a little effect on the microhardness.