摘要
奥氏体不锈钢 1Cr18NigTi 的温加工温度范围以 200—400℃为宜。在此温度范围内加工时,钢具有较低的变形抗力、较高的工艺塑性,加工后具有良好的力学性能。当变形速率一定时,真应力的大小取决于变形温度和变形程度。当 T=200—400℃ 时,σ=Kε~n;当 T=400—600℃ 时,σ=K_1ε~ne^(B/T_K)。钢的变形抗力、塑性和加工后室温力学性能的变化主要是由钢组织中的双晶界间距和位错密度的变化所决定。
The optimum warm-working temperature rang of austenite stainless steel1Cr18Ni9Ti was proved from 200 to 600℃. In such a temperature rang, the steelworkpieces showed relatively low resistance to deformation and high ductility,with good room-temperature mechanical properties after warm working. Thetrue stresses were found dependent on the working temperature and the degree ofdeformation if deformatiom rate is constant, i.e., T=200--400℃, σ=Kε' and T=400--600℃, σ=K_1εe^ne^B/T K respectively. It is found that for the steel the resistance todeformation, ductility and its room temperature mechanical properties afterworking will vary with the structural changes in distance between twin boun-daries and dislocation density.
关键词
奥氏体不锈钢
轧制
温加工
austenite stainless steel
warm working
resistance to deformation
structure
mechanical properties
