【摘要】 对经1 055 ℃正火和765 ℃回火优化工艺生产的9Cr 1Mo V Nb N厚壁无缝钢管,进行室温和 566 ℃的静力强塑性的检测和评估,就取样位置和取样方向对强塑性的影响进行了 t统计检验评估及强塑性的标准偏差评估。结果表明,按优化工艺生产的9Cr 1Mo V Nb N厚壁无缝钢管显著优于1 050 ℃正火和790 ℃回火原工艺生产的厚壁无缝钢管,强塑性指标及其标准偏差已达到进口P91厚壁无缝钢管的水平,表明我国9Cr 1Mo V Nb N厚壁无缝钢管的制造技术已日趋成熟。更多还原

【Abstract】 In this paper the static strength and plasticities of 9Cr-1Mo-V-Nb-N thick-wall seamless steel pipe ware measured at room temperature and 566 ℃,which were heat treated by using optimizing process parameters of 1 055 ℃ normalization and 765 ℃ temper. The effect of sampling positions and sampling directions on the static strength and plasticities were respectively evaluated by using statistic test t and standard deviation s. The results showed that the static strength and plasticities and standard deviation were superior to those of 9Cr-1Mo-V-Nb-N thick-wall seamless steel pipe heat-treated by using original process and were about equal to those of imported P91 thick-walled seamless steel pipe. So these reveal that the manufacturing techniques of 9Cr-1Mo-V-Nb-N thick-walled seamless steel pipe in our country were ripeness gradually.更多还原