Borhani Mohammad Reza, Kermani Fareed, Shoja Razavi Reza, Erfanmanesh Mohammad, Barekat Masoud
Faculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, Iran.
Materials and Energy Research Center, Karaj, Iran.
Heliyon. 2024 Sep 24;10(19):e38353. doi: 10.1016/j.heliyon.2024.e38353. eCollection 2024 Oct 15.
Duplex stainless steel is an alloy that combines the advantages of austenitic stainless steel and ferritic stainless steel. It has excellent corrosion resistance, high strength, and good weldability. One of the main problems in marine shafts using X2CrNiMoN22-5-3 Duplex Stainless Steel (2205) is bending and warping over time. In this study, 42CrMO4 (MO40) steel was clad with 2205 dual-phase steel using direct metal deposition with wire to simultaneously utilize the mechanical properties, and corrosion resistance. Perform metallographic imaging, corrosion test, and tensile test, to maintain the quality of the cladding. The results show that the corrosion potential of 2205 cladding layer is -0.65 (including semi-passive zone), while the control sample of 2205 had a corrosion potential of -0.26, and the MO40 substrate had a corrosion potential of -0.1 (highlighting the advantage of the cladding in thermodynamics term). EIS results showed that the , , and . The corrosion rate for the substrate, control sample, and laser-clad sample were 0.33, 0.15, and 0.00095 mm/year, respectively, without significant loss in tensile properties. The final strength for MO40(with 2205 clad) reaches 672 MPa with a 14 % decrease from 788 for MO40. In this case, we still have a 36 % increase in strength compared to the 2205 sample. It seems that the bent problem of the pure 2205 marine shaft can be solved completely in this case and continues to be solved in our ongoing work.
双相不锈钢是一种结合了奥氏体不锈钢和铁素体不锈钢优点的合金。它具有优异的耐腐蚀性、高强度和良好的可焊性。在使用X2CrNiMoN22-5-3双相不锈钢（2205）的船用轴中，一个主要问题是随着时间的推移会发生弯曲和翘曲。在本研究中，采用直接金属丝材熔敷工艺将42CrMO4（MO40）钢与2205双相钢进行熔覆，以同时利用其机械性能和耐腐蚀性。进行金相成像、腐蚀试验和拉伸试验，以保持熔覆质量。结果表明，2205熔覆层的腐蚀电位为-0.65（包括半钝化区），而2205对照样品的腐蚀电位为-0.26，MO40基体的腐蚀电位为-0.1（从热力学角度突出了熔覆层的优势）。电化学阻抗谱（EIS）结果表明，……。基体、对照样品和激光熔覆样品的腐蚀速率分别为0.33、0.15和0.00095毫米/年，拉伸性能没有显著损失。MO40（熔覆2205）的最终强度达到672兆帕，比MO40的788兆帕降低了14%。在这种情况下，与2205样品相比，强度仍提高了36%。看来，纯2205船用轴的弯曲问题在这种情况下可以完全解决，并且在我们正在进行的工作中仍在继续解决。
