铁素体/珠光体带状组织对L360N管线用无缝钢管冲击性能的影响  

Effect of Ferrite/Pearlite Band Structure on Impact Property of L360N Seamless Steel Linepipe

作　　者：苏阳[1] 邹喜洋[1] 朱林[1] 

机构地区：[1]衡阳华菱钢管有限公司技术中心,湖南衡阳421001

出　　处：《钢管》2012年第5期40-44,共5页Steel Pipe

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.

关 键 词：管线用无缝钢管 L360N钢级 带状组织 冲击性能 拉伸性能 

分 类 号：TG335.71[金属学及工艺—金属压力加工]