CAJ | 학술논문

针对海洋用CRA双金属复合管薄壁基管堆焊过程中出现显著的管端缩径，机械加工后管端尺寸超差这一问题，设计了工艺革新及改进方案。通过采用优化焊接工艺参数和调整管端机械加工工艺等措施，使得双金属复合管管端机械加工后的尺寸满足了设计要求，同时Fe的稀释率降低。堆焊后对堆焊层进行拉伸试验、冲击试验、硬度测试、金相组织观察以及晶间腐蚀试验，结果表明，堆焊层的力学性能良好，且具备较好的耐腐蚀性能。
침대해양용CRA쌍금속복합관박벽기관퇴한과정중출현현저적관단축경，궤계가공후관단척촌초차저일문제，설계료공예혁신급개진방안。통과채용우화한접공예삼수화조정관단궤계가공공예등조시，사득쌍금속복합관관단궤계가공후적척촌만족료설계요구，동시Fe적희석솔강저。퇴한후대퇴한층진행랍신시험、충격시험、경도측시、금상조직관찰이급정간부식시험，결과표명，퇴한층적역학성능량호，차구비교호적내부식성능。
Aiming at the problem that pipe ends reduction occurred in CRA bimetal lined pipe overlay welding process, which caused pipe end dimension out-of-tolerance after mechanic processing , it designed technical innovation and improvement approach. By optimizing welding parameters and adjusting the mechanic processing technology of pipe ends , it made the dimension of bimetal lined pipe ends after machining meet the design requirements , and the dilution rate of iron element content decrease. The tensile test , impact test , hardness test , microstructure observation and intergranular corrosion test to overlaying layer were conducted. The results indicated that the overlaying layer performance is good, and are with better corrosion resistance performance.