摘要
Φ127 mm S135钻杆摩擦焊焊区横向侧弯试验中发生了试样断裂,通过断口宏观和微观分析,结合焊区金相组织、化学分析、拉伸性能、冲击韧性和硬度等试验,分析得出试样断裂原因为:钻杆摩擦焊焊区存在粒状FeS和MnS非金属夹杂物。
The specimen of the Φ127 mm S135 drill pipe friction welding was broken in the transverse side-bending test,the cause of the fracture was analyzed by means of fracture surface observation,metallurgical structure of weld joint,chemical analysis,tensile,impact and hardness test. The results show that tranular FeS and MnS Nonmetallic inclusions are in the drill pipe friction welding seam.
引文
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