X65管线钢落锤性能不合分析  

Analysis of Disqualification in Drop-Weight Tear Test on X65 Pipeline Steel

作　　者：王丽霞 臧淼[2] 秦坤[2] 刘志勇[2] 

机构地区：[1]唐山中厚钢板有限公司 [2]河北钢铁集团唐钢技术中心

出　　处：《宽厚板》2014年第2期38-40,共3页Wide and Heavy Plate

摘　　要：针对唐山中厚板公司所生产20.8 mm厚X65管线钢板落锤试样性能不合现象,进行了金相组织及断口扫描电镜分析,发现不合试样的显微组织中针状铁素体含量较低,主要由于终冷温度高和冷却速率低造成,在后续的生产中优化了工艺,使产品落锤性能合格率得到明显提升。Scanning electron microscope analysis on metallographic structure and fracture is implemented for thedisqualified DWTr specimen of 20.8 mm thickness X65 pipeline steel plate produced by Tangshan Plate Co. Ltd. It isfound that there is little acicular ferrite component in microstrueture of disqualified specimen, which is caused by high-er finish cooling temperature and lower cooling rate. After process optimization in subsequent production, the qualifica-tion rate of the steel plate in DWTT is greally increased.

关 键 词：管线钢 X65 落锤性能不合 

分 类 号：TG142.1[一般工业技术—材料科学与工程]