为提高普通碳钢表面耐蚀性,利用5 kW横流CO2激光加工设备在45钢表面激光熔覆制备304不锈钢涂层.采用光学显微镜、XRD和SEM等手段对所制备涂层的显微组织及相组成进行分析,并分别利用化学侵蚀实验和阳极极化曲线对涂层的耐腐蚀性能进行测试.结果表明:熔覆层由铁素体和奥氏体双相组成,自界面处到顶端逐渐由单一粗大的柱状晶向尺寸约为5～8 μm的致密细小的等轴晶过渡;在15％ FeCl3溶液中静置24 h后,基材被腐蚀而熔覆层无明显变化;熔覆层的自腐蚀电位比基材高290 mV,仅比商用304不锈钢低70 mV,而3者之中熔覆层的自腐蚀电流密度最低.
参考文献
| [1] | Zhang L;Zhang Y K;Lu J Z et al.Effects of laser shock processing on electrochemical corrosion resistance of ANSI 304 stainless steel weldments after cavitation erosion[J].Corrosion Science,2011,66:5-13. |
| [2] | Reinhart Poprawe.激光制造工艺[M].北京:清华大学出版社,2008 |
| [3] | Anjos M A;Vilar R;Qiu Y Y .Laser cladding of ASTM S31254 stainless steel on a plain carbon steel[J].Sur Coat Tec,1997,92(1-2):142-149. |
| [4] | Jyotsna Dutta Majumdar;Ajeet Kumar;Lin Li .Direct laser cladding of SiC dispersed AISI 316L stainless steel[J].Tribology International,2009(5):750-753. |
| [5] | Pinkerton AJ.;Li L. .An investigation of the effect of pulse frequency in laser multiple-layer cladding of stainless steel[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2003(0):405-410. |
| [6] | 徐鹏,林成新,周超玉,宋志成.激光熔覆304不锈钢涂层的工艺及组织[J].材料热处理学报,2013(07):142-146. |
| [7] | Anjos M A;Vilar R;Qiu Y Y .Laser cladding of ASTM S31254 stainless steel on a plain carbon steel substrate[J].Sur Coat Tee,1997,92(1-2):142-149. |
| [8] | 刘振侠 .激光熔凝和激光熔覆的数学模型及数值分析[D].西北工业大学,2003. |
| [9] | Anthony T R;Cline H E .Surface rippling induced by surface-tension gradients during laser surface melting and alloying[J].Journal of Applied Physics,1977,48(09):3888-3894. |
| [10] | 刘祥庆,郭志猛,高克玮,林涛,张瑞珠.感应熔覆Ni60涂层显微组织及耐蚀性[J].材料热处理学报,2012(z1):96-100. |
| [11] | In situ impedance spectroscopy study of the electrochemical corrosion of Ti and Ti-6Al-4V in simulated body fluid at 25 ℃ and 37 ℃[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2009(10):2473. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%