摘要
分析了L360N管线用无缝钢管在热轧态、920℃正火1h、1150℃均匀化退火3h、1150℃均匀化退火3h+920℃正火1h四种状态下的微观组织和力学性能,并对每种热处理状态下带状组织区域和非带状组织区域进行了对比。发现L360N管线钢中的带状组织可以通过长时间高温均匀化退火消除;其带状组织对拉伸性能影响不明显,但对冲击性能影响较大。
Analyzed are the microstructures and mechanical properties of the L360N seamless steel linepipe with different heat treatment conditions, i.e., as-hot rolled, 1 hour-normalized at a temperature of 920 ℃, 3 hour-uniform annealed at a temperature of 1 150 ℃, and the combination of the latter two. The band areas and the non-band areas under the four different heat treatment conditions are compared. As a result, it is identified that the band structure of the L360N linepipe-purpose steel can be eliminated by means of long-time uniform annealing treatment at an elevated temperature, and that the band structure of the steel produces little influence on its tensile property, but strongly influences its impact property.
出处
《钢管》
CAS
2012年第5期40-44,共5页
Steel Pipe
