摘要
对CrWMn钢实现超塑性的预处理工艺及变形条件的试验结果表明。以840℃淬10%盐水(循环三次)并进行中间回火的预处理工艺,在720℃, ε。=2×10~4s^(-1)的条件下拉伸,可获得最佳的效果,δ=804%,流动应力仅4.51MN/m^2变形加剧了第二相(碳化物)颗粒的聚集、长大,从而加剧了基体晶粒的长大。而应变速率对第二相粒子的长大速率及形态有明显的影响。
The result from studying on the pre-treating and deforming condition of CrWMn super plastic steel shows that the specimen after pre-treatment (840℃ quenching at 10% salt-water through three times added with internal tempering) was best plasticity at the test condition of 720、℃ ε=2×10^(-4)(?)^(-1), its property is δ=804% and flow stress is 4.51MN/m^2. The deformation promots the aggregation and growing of secondary phase (carbids); then promots the growing of basal crystal. Research work shows that the rate of deformation is the obviously factor to the rate of growing and figuration of secondary cementite.
出处
《热加工工艺》
CSCD
北大核心
1989年第1期41-44,共4页
Hot Working Technology
