CAJ | 학술논문

在不同热处理温度和载荷下，研究了 CM-SX-6单晶的再结晶现象。结果表明：在低于1150℃×4 h热处理后，没发现再结晶现象，但在载荷的作用下，单晶退火时γ＇相形成元素自发偏析，造成大量的大颗粒γ＇相在共晶周围析出；随着热处理温度升高，载荷影响区再结晶经历由压痕周围胞状再结晶、枝晶干再结晶、多个等轴再结晶三个阶段；在高于1150℃×4 h热处理时，单晶随着载荷的增加，再结晶的范围和深度明显增大；以及随冷却速率的增加，再结晶晶粒之间的热裂倾向增大，致使大量热裂沿晶界分布。
재불동열처리온도화재하하，연구료 CM-SX-6단정적재결정현상。결과표명：재저우1150℃×4 h열처리후，몰발현재결정현상，단재재하적작용하，단정퇴화시γ＇상형성원소자발편석，조성대량적대과립γ＇상재공정주위석출；수착열처리온도승고，재하영향구재결정경력유압흔주위포상재결정、지정간재결정、다개등축재결정삼개계단；재고우1150℃×4 h열처리시，단정수착재하적증가，재결정적범위화심도명현증대；이급수냉각속솔적증가，재결정정립지간적열렬경향증대，치사대량열렬연정계분포。
The recrystallization behavior of nickel-based single crystal superalloy CMSX-6 at different heat treat-ment temperatures and different magnitude loads were investigated.The result shows that there is no recrystal-lization occurring below 1 150 ℃ for 4 h,while a large number ofγ'particles are precipitated around the eutectic because of the spontaneous segregation ofγ'form elements under the load;As the heat treatment temperature increases,recrystallization of the load influenced area includes three processes:cellular recrystallization around the indentation,recrystallization of the dendritical core and multiple equiaxed grain;When the heat treatment above 1 150 ℃ for 4 h,with the increasing of loading,the area of recrystallization increases distinctly;Last,as the cooling rate increases,the tendency of the heat cracking between the recrystallized grains turns larger and a lot of hot cracking distributed along the recrystallized grain boundary.