CAJ | 학술논문

针对直缝埋弧焊管生产过程中焊缝产生CO气孔的原因进行了分析，得出直缝埋弧焊管生产过程中产生CO气孔的工艺原因是焊接电流小而焊缝熔深大的结论。并针对CO气孔产生的原因在焊接工艺方面提出了相应的改进措施：在电流较小时更换细焊丝；增大一丝电流；减小预焊合缝钝边间隙；改变坡口尺寸；提高预焊缝焊接质量；降低焊速。在钢管生产过程中采用以上措施后，有气孔缺陷钢管的比例从生产初期的40%降到2%以下，钢管的生产效率提高50%以上。
침대직봉매호한관생산과정중한봉산생CO기공적원인진행료분석，득출직봉매호한관생산과정중산생CO기공적공예원인시한접전류소이한봉용심대적결론。병침대CO기공산생적원인재한접공예방면제출료상응적개진조시：재전류교소시경환세한사；증대일사전류；감소예한합봉둔변간극；개변파구척촌；제고예한봉한접질량；강저한속。재강관생산과정중채용이상조시후，유기공결함강관적비례종생산초기적40%강도2%이하，강관적생산효솔제고50%이상。
In this article, it analyzed the cause of CO gas pocket generated in SAWL pipe production process, a conclusion of small welding current and deep penetration was obtained. Some improvement measures for CO gas pocket were put forward:to change the fine welding wire when the welding current is small; to increase welding current for the first wire, and decrease root face clearance of joint close pre-welding ; change groove size; increase welding quality of pre-welding and decrease welding speed. All the above measures can make the proportion of steel pipe with gas pocket defects from 40% to 2% below, and increase productivity efficiency by 50%above.