CAJ | 학술논문

介绍了双金属内衬复合管的成型工艺及主要成型方法，分析了双金属复合管在液压成型后，内、外层钢管的受力状态。根据变形协调条件，得出复合管内外层残余接触压力与残余接触应力的正相关关系式。依据滑动摩擦原理，提出了通过测量内外层间的推脱力，替代API SPEC 5LD推荐的测量残余接触应力计算紧密度的方法。最后分析了紧密度的影响因素，即紧密度的大小受复合管成型液压压力、后续涂敷温度和现场试压压力的影响。
개소료쌍금속내츤복합관적성형공예급주요성형방법，분석료쌍금속복합관재액압성형후，내、외층강관적수력상태。근거변형협조조건，득출복합관내외층잔여접촉압력여잔여접촉응력적정상관관계식。의거활동마찰원리，제출료통과측량내외층간적추탈력，체대API SPEC 5LD추천적측량잔여접촉응력계산긴밀도적방법。최후분석료긴밀도적영향인소，즉긴밀도적대소수복합관성형액압압력、후속도부온도화현장시압압력적영향。
In this article, it mainly introduced forming process and the main forming methods for bimetal composite pipe with lining, and analyzed stress state of the inner pipe and outer pipe after hydroforming. On the basis of deformation compatibility condition,the positive correlation relation obtained between the residual contact pressure and the residual contact stress of the inner pipe and outer pipe. According to the principle of sliding friction, the new tightness calculation method by measuring force pushing out the liner pipe was proposed. This can replace the tightness test method recommended in API 5LD Specification. Finally, the influence factors to tightness were analyzed, such as hydraulic pressure, the subsequent coating temperature and field test pressure.