钢带质量对HFW焊管超声波探伤合格率的影响  

Effect of Strip Quality on the Conformity Ratio of Ultrasonic Testing(UT) for HFW Pipe

作　　者：郭斌[1,2] 郑琳[1] 王青峰[2] 徐进桥[1] 刘昌明[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,武汉430080 [2]燕山大学,河北秦皇岛066004

出　　处：《焊管》2014年第4期58-61,共4页Welded Pipe and Tube

摘　　要：分析了HFW焊管超声波探伤不合格的影响因素,提出了提高HFW焊管超声波探伤合格率的有效措施。研究表明,钢板内部存在着级别较高、聚集分布的Al2O3和稀土硫氧化物等非金属夹杂物,在制管应力作用下产生钩状裂纹,是导致HFW焊管探伤不合格的根本原因;含Ca,Si,Al,Mg,Na和O等元素的大型夹渣也会导致HFW焊管探伤不合格;通过采取Si-Ca处理代替RE处理、增加RH真空处理、控制中包连浇炉数、低S和超低S技术等针对性措施,提高钢水纯净度和连铸坯质量,可有效提高钢板探伤合格率。In this article, the influence factors of UT on HFW pipe were analyzed and effective measures for improving UT conformity ratio were pointed out. The results showed that high level collectively distributed aluminium oxides and RE oxides/sulfides which caused hooked cracks were the fundamental reason of ultrasonic test failure;large inclusions containing Ca, Si, Al, Mg, Na and O can also lead to ultrasonic test failure;by adopting Si-Ca treatment instead of RE treatment, increasing RH vacuum treatment, controlling the number of casting furnace, the low-sulfur and super low-sulfur technology, which improved the purity of melt steel and the quality of casting blank, can effectively enhance the conformity ratio of ultrasonic test.

关 键 词：HFW焊管 超声波探伤 带钢 质量 

分 类 号：TE973.6[石油与天然气工程—石油机械设备]