CAJ | 학술논문

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。
침대당산중후판공사소생산20.8 mm 후 X65관선강판락추시양성능불합현상，진행료금상조직급단구소묘전경분석，발현불합시양적현미조직중침상철소체함량교저，주요유우종랭온도고화냉각속솔저조성，재후속적생산중우화료공예，사산품락추성능합격솔득도명현제승。
Scanning electron microscope analysis on metallographic structure and fracture is implemented for the disqualified DWTT specimen of 20. 8 mm thickness X65 plpeline steel plate produced by Tangshan Plate Co. Ltd. It is found that there is little acicular ferrite component in microstructure 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 greatly increased.