大口径P91无缝钢管低温形变退火 |
| |
引用本文: | 徐小华,陈俊德,姚靓,薛刚毅,肖学山,陈益. 大口径P91无缝钢管低温形变退火[J]. 金属热处理, 2010, 35(4) |
| |
作者姓名: | 徐小华 陈俊德 姚靓 薛刚毅 肖学山 陈益 |
| |
作者单位: | 1. 上海大学,材料研究所,上海,200072 2. 无锡德新钢管有限公司,江苏,无锡,214177 |
| |
摘 要: | 研究推制式生产和低温形变退火的大口径P91无缝热扩钢管的显微组织、晶粒度、非金属夹杂物和室温力学性能,并与原管和热扩后经正火+回火处理的热处理钢管进行对比。结果表明,推制式低温形变退火生产的热扩钢管显微组织为回火马氏体,晶粒度6级,纵向和横向屈服强度、抗拉强度、伸长率、布氏硬度分别达到565、740 MPa,25%,220 HB和540、730 MPa,24%,218 HB。P91无缝钢管在低温形变退火后,屈服强度、抗拉强度、硬度略微下降,显微组织、晶粒度和非金属夹杂物与低温形变退火前保持一致,符合ASTM A335标准对P91和GB 5310—2008标准对10Cr9Mo1VNbN的要求。
|
关 键 词: | P91无缝钢管 低温形变退火 热扩钢管 |
Low temperature thermomechanical annealing of P91 large-sized seamless steel tube |
| |
Abstract: | Microstructure,grain size,non-metallic inclusion and mechanical properties of P91 large-sized hot-expanded steel tube with low temperature thermomechanical annealing were investigated It was compared with crude seamless steel tube and hot-expanded steel tube with normalizing+tempering.The results indicate that the microstructure of the hot-expanded steel tube with the low temperature thermomechanical annealing is tempered martensite,and the longitudinal and horizontal yield strength,tensile strength,elongation,brinell hardness reach approximately 565 MPa,740 MPa,25% ,220 HB and 540 MPa,730 MPa,24% ,218 HB respectively These mechanical properties of P91 hot-expanded steel tube decrease slightly,while the microstructure,grain size,non-metallic inclusion keep consistent before and after the low temperature thermomechanical annealing The test results fully meet the requirements of ASTM A335 to P91 and GB 5310-2008 to 10Cr9Mo1VNbN. |
| |
Keywords: | P91 seamless steel tube low temperature thermomechanical annealing hot-expanded steel tube |
本文献已被 CNKI 万方数据 等数据库收录! |
|