CAJ | 학술논문

退火温度和退火时间是影响低碳钢旋压件再结晶退火后微观组织及力学性能的主要因素。对不同减薄率的旋压件采取变温恒时和恒温变时的方法，研究退火温度及退火时间对20钢经强力错距旋压后的变形组织及力学性能的影响。试验结果表明，在560℃～600℃区间，旋压件硬度随退火温度的升高急剧减小，退火时间对试样力学性能的影响随退火温度的升高变得更明显；在580℃时保温1 h退火后，铁素体均转变成等轴状细晶，晶粒尺寸约0.6μm，尺寸更细小的渗碳体颗粒大部分弥散在铁素体晶界上。
퇴화온도화퇴화시간시영향저탄강선압건재결정퇴화후미관조직급역학성능적주요인소。대불동감박솔적선압건채취변온항시화항온변시적방법，연구퇴화온도급퇴화시간대20강경강력착거선압후적변형조직급역학성능적영향。시험결과표명，재560℃～600℃구간，선압건경도수퇴화온도적승고급극감소，퇴화시간대시양역학성능적영향수퇴화온도적승고변득경명현；재580℃시보온1 h퇴화후，철소체균전변성등축상세정，정립척촌약0.6μm，척촌경세소적삼탄체과립대부분미산재철소체정계상。
Both the annealing temperature and soaking time are the main factors affecting the microstructure and the mechanical properties of the spun workpiece .The two different methods of varied time vs .constant temperature and varied temperature vs . constant time were adopted to discuss the relationships between the annealing temperature and the microstructure , the mechanical properties of spun workpiece under different reductions of wall thickness obtained by power stagger spinning . The result shows that the workpiece hardness decreased sharply when the annealing temperature rose from 560℃ to 600℃ ,and the influence of the soaking time on the mechanical properties of the spun workpieces becomes more obvious under a higher annealing temperature . After the heating at 580℃ for 1 hour heat soaking , the equiaxed ultrafine grains with average size of approximately 0.6 um were generated ,and the more finer cementite particles were majorly dispersed at the ferrite grain boundaries .