通过在2.85C-31Cr合金中加入多元微量合金元素V、Ti、Nb、Mo制备多元铬系合金，研究多元微合金化对高铬铸铁的凝固组织和冲击磨损性能的影响。结果表明：铁液中部分C与强碳化物形成元素结合生成碳化物或合金碳化物；随合金元素加入量的增加，高铬铸铁凝固组织从稍微过共晶转变成共晶、亚共晶组织；相同成分的合金质量损失率随冲击磨损载荷（2.0、2.5、3.0、3.5 J）的增加呈先增加后减小、再增大的变化规律，这与材料在冲击磨损过程中的硬化行为有关；凝固组织中奥氏体数量越多，磨损质量损失率越大，尺寸细小和分布均匀的凝固组织能减小磨损质量损失率；在同一冲击载荷下，共晶成分的合金质量损失率最小，亚共晶成分的质量损失率最大。
Titanium,vanadium,niobium and molybdenum were added into 2.85C?31Cr high chromium cast iron to prepare multicomponent chromium alloys. The influence of titanium,vanadium,niobium and molybdenum on microsturcture evolvement and impact wear properties was investigated. The results show that carbon in iron liquid together with strong carbides formation elements form the corresponding carbides or alloy carbides. With the increase of addition amount of alloy elements,the microstructure of high chromium cast iron changes from hypereutectic into eutectic and hypoeutectic alloy. The weight losses of the alloy with the same component increase first and then decrease with the increase of impact load(2.0,2.5,3.0,3.5 J),which is related with the hardening behavior of the wearing surface during the impact wear. The more the amount of austenite,the higher the wear weight loss rate. The microstructure with fine size and even distribution can decrease the wear weight loss rate. The wear weight loss for eutectic alloy is the minimum and that for hypoeutectic alloy is the maximum under the same impact load.
参考文献
| [1] | Havva Kazdal Zeytin,Hakan Yildirim,Banu Berme,Selim Duduoglu,Gtirkan Kazdal,Adem Deniz.Effect of Boron and Heat Treatment on Mechanical Properties of White Cast Iron for Mining Application[J].钢铁研究学报：英文版,2011(11):31-39. |
| [2] | 符寒光,邢建东,雷永平.含硼白口铸铁的研究进展[J].铸造,2008(09):878-884. |
| [3] | Zhang TC.;Li DY. .Effect of alloying yttrium on corrosion-erosion behavior of 27Cr cast white iron in different corrosive slurries[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):87-97. |
| [4] | Sudsakorn Inthidech;Khatawut Boonmak;Prasonk Sricharoenchai;Nobuya Sasaguri;Yasuhiro Matsubara .Effect of Repeated Tempering on Hardness and Retained Austenite of High Chromium Cast Iron Containing Molybdenum[J].Materials transactions,2010(7):1264-1271. |
| [5] | 程巨强,康春龙,高兴明,王先武.微合金化多元合金高铬铸铁破碎机板锤的研制与应用[J].铸造技术,2004(10):738-740,755. |
| [6] | 许利民,邹克武,翟亚兵.微合金化多元高铬铸铁磨球耐磨性研究[J].矿山机械,2006(01):45-46. |
| [7] | 符寒光,洪桃生,胡玉平.多元合金高铬铸铁篦条的研制和应用[J].现代铸铁,2004(05):32-35. |
| [8] | Lu LM.;Soda H.;McLean A. .Microstructure and mechanical properties of Fe-Cr-C eutectic composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):214-222. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%