A new family of resource saving, high chromium and manganese super duplex stainless steels （DSSs）, with a composition in mass percent, % of Cr 0.29, Mn 0.12, Ni 2.0, Mo i. 0, and N 0. 51-0. 68, has been developed by examining the effect of N on the microstructure, mechanical properties and corrosion properties. The results show that these alloys have a balanced ferrite-austenite relation. The austenite volume fraction decreases with the solution treatment temperature, but it increases with an increase in N content. The increases in nitrogen enhance the ultimate tensile strength （UTS） and reduce the ductility of the material slightly. The pitting corrosion potential increases first and then decreases with an increase in nitrogen content when the amount of N arrives to 0.68%. The yield stress and ultimate tensile strength of solution treated samples were more than 680 and 900 MPa, the elongation of experimental alloys are higher than 30%, respectively, what is more, the pitting potentials were beyond 1 100 mV.
参考文献
| [1] | Solomon H D;Devine T M.Diplex Stainless Steel[M].Met als Park:ASM,1983 |
| [2] | H. VANNEVIK;J.-O. NILSSON;J. FRODIGH;P. KANGAS .Effect of Elemental Partitioning on Pitting Resistance of High Nitrogen Duplex Stainless Steels[J].ISIJ International,1996(7):807-812. |
| [3] | WANG Jun;Uggowitzer P J;Magdowski R et al.Nickel Free Duplex Stainless Steel[J].Scripta Materialia,1999,40(01):123. |
| [4] | LI Jun;XU Yu lai;XIAO Xue-sllan et al.A New Resource- Saving High Manganese and Nitrogen Super Duplex Stainless Steel 25Cr 2Ni-3Mo-x-Mn N[J].Materials Science and Engi neering,2009,527A:245. |
| [5] | Tsuge H;Tarutani Y;Kodo T .Effect of Nitrogen on the Lo calized Corrosion Resistance of Duplex Stainless Steel Simulated Weldments[J].Corrosion,1988,44(05):305. |
| [6] | Liljas M;Nilsson JO .Development of commercial nitrogen-rich stainless steels[J].Materials Science Forum,1999(0):189-200. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%