In this paper, the influence of microstructure on the corrosion behavior of a hotextruded nickel aluminum bronze was studied. Three kinds of samples subjected to the hot-extrusion, annealing and quenching conditions were prepared and immersion tests in 3.5% NaCl solution were carried out. Microstructures and corrosion surface morphologies of the samples were observed by SEM. It was found that the retained β'martensite and (α+κⅢ) lamella eutectoid in the as hot-extruded material were eliminated after annealing, and corrosion resistance of the alloy was improved. As to the as-quenched material, its corrosion rate was higher than that of the as hotextruded material since the volume fraction of β' phase which was anodic to a phase increased after quenching. As regards the mechanical properties, the as-quenched sample possesses the highest hardness and tensile strength among the three kinds of samples, while the as-annealed sample possesses the highest elongation. That is to say, heat treatment plays different roles in the mechanical properties and corrosion resistance of the experimental alloy.
参考文献
| [1] | M. Kaplan;A. K. Yildiz .The effects of production methods on the microstructures and mechanical properties of an aluminum bronze[J].Materials Letters,2003(28):4402-4411. |
| [2] | J. Dutkiewicz;T. Czeppe;J. Morgiel .Effect of titanium on structure and martensic transformation in rapidly solidified Cu-Al-Ni-Mn-Ti alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(0):703-707. |
| [3] | R. C. Barik;J. A. Wharton;R. J. K. Wood;K. S. Tan;K. R. Stokes .Erosion and erosion-corrosion performance of cast and thermally sprayed nickel-aluminium bronze[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2005(1):230-242. |
| [4] | J.E. Tibballs;Raluca Erimescu .Corrosion of dental aluminium bronze in neutral saline and saline lactic acid[J].Dental materials,2006(9):793-798. |
| [5] | A. Al-Hashem;W. Riad .The role of microstructure of nickel-aluminium-bronze alloy on its cavitation corrosion behavior in natural seawater[J].Materials Characterization,2002(1):37-41. |
| [6] | C.H. Tang;F.T. Cheng;H.C. Man .Effect of laser surface melting on the corrosion and cavitation erosion behaviors of a manganese-nickel-aluminium bronze[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):195-203. |
| [7] | A.A.El-Meligi.Corrosion Behaviours of Copper Alloy in Solutions Containing Na2SO4 and NaCl with Different Concentrations[J].材料科学技术学报(英文版),2002(06):549-551. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%