对含不同质量分数（0,0.6%,3%）铜的高铬铁素体钢在650℃和140MPa条件下蠕变前后的组织和蠕变性能进行了研究。结果表明：随着铜含量从0提高3%,钢的蠕变断裂时间从1172h提高到1 620h,蠕变速率从2.2×10-9s-1降低到1.2×10-9s-1;铜的添加有效抑制了对蠕变性能不利的高温δ铁素体相的形成;添加3%铜的试验钢基体内弥散析出了大量尺寸为50～100nm的富铜相,有效抑制了位错的运动,从而提高了该钢的蠕变抗力。
The microstructure and creep property before and after creep of three high chromium ferric steels with 0wt%Cu,0.6wt%Cu and 3wt%Cu were studied under the conditions of 650 ℃ and 140 MPa.The results show that the creep fracture time increasing from 1 172 h to 1 620 h and the creep rate decreased from 2.2×10-9 s-1 to 1.2×10-9 s-1 with the Cu content increasing from 0wt% to 3wt%.The addition of Cu effectively suppressed forming high temperature δ-ferrite phase adverse to the creep property.Numerous Cu-rich phases with the size of 50-100 nm dispersedly precipitated in the matrix of the tested steel with 3wt%Cu,which could effectively restrain the motion of dislocation and thus increase the creep resistance of the steel.
参考文献
| [1] | 刘俊亮.一种新型高铬铁素体钢的蠕变性能及显微组织[J].机械工程材料,2011(02):54-57. |
| [2] | 朱丽慧,赵钦新,顾海澄,陆燕荪.新型耐热钢T91的蠕变断裂寿命估算[J].锅炉技术,2002(05):24-27. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%