316L不锈钢焊接头耐蚀性能研究

稀有金属材料与工程, 2010, 39(3): 393-396.

316L不锈钢焊接头耐蚀性能研究

韩丽青 ^1, , 林国标 ^2, , 王自东 ^3, , 张鸿 ^4, , 李锋 ^5, , 游龙 ^6,

1.北京科技大学,北京,100083;中国原子能科学研究院中国实验快堆,北京,102413

2.北京科技大学,北京,100083

3.北京科技大学,北京,100083

4.北京科技大学,北京,100083

5.北京科技大学,北京,100083

6.北京科技大学,北京,100083

基金项目: Pre-Research Foundation of CPLA General Equipment Department(1318040211)

关键词：爆炸焊接 , 微组织形貌 , 相分析 , 点蚀 , 电偶腐蚀

Study on Corrosion Resistance of 316L Stainless Steel Welded Joint

Han Liqing ^1, , Lin Guobiao ^2, , Wang Zidong ^3, , Zhang Hong ^4, , Li Feng ^5, , You Long ^6,

1.北京科技大学,北京,100083;中国原子能科学研究院中国实验快堆,北京,102413

2.北京科技大学,北京,100083

3.北京科技大学,北京,100083

4.北京科技大学,北京,100083

5.北京科技大学,北京,100083

6.北京科技大学,北京,100083

Keywords： explosive welding , microstructure morphology , phase analysis , pitting corrosion , galvanic corrosion

分别采用扫描电镜(SEM)、X射线衍射(XRD)、动电位极化技术及零内阻安培表方法研究爆炸焊接316L不锈钢接头的显微组织形貌、物相、点蚀及电偶腐蚀行为.结果表明,316L不锈钢侧焊缝金属存在严重的组织形变和金属间化合物相,且相对于基体试样,316L不锈钢侧焊缝和熔合区产生了更多的δ铁素体相,这些因素导致焊接后的316L不锈钢耐点蚀和电偶腐蚀性能降低.

The morphology, phase, pitting corrosion behaviors and galvanic corrosion resistance behavior of the welded joint of 316L stainless steel and Ti(TA2) clad plate were studied by scanning electron microcopy (SEM), X-ray diffraction (XRD), zero-internal resistance ammeter and potentiodynamic polarization technique. The results show that the welded 316L presents severe deformation and has intermetallic phase; moreover, more δ-ferrite phase emerges at the welded seam and fusion area near 316L side. All these factors lead to the decrease of pitting corrosion resistance and galvanic corrosion resistance of the welded 316L.

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