以45钢和42CrMo钢为材料,对比研究了合金元素对离子碳氮共渗化合物层生长动力学的影响.利用光学显微镜、显微硬度计和X射线衍射仪对化合物层的显微组织、厚度、硬度及物相进行了测试和分析.结果表明,相同工艺条件下,42CrMo钢表面形成的化合物层厚度比45钢薄,但有效硬化层较厚,表面硬度高且截面硬度梯度较为平缓;随着保温时间的延长,45钢离子碳氮共渗后化合物层中的主要物相发生了γ'-Fe4(C,N)→ε-Fe2-3(C,N)的转变,而在42CrMo钢表层则无该转变,但出现了CrN、CrC及Mo2(C,N)相;动力学分析表明42CrMo钢形成化合物层的扩散激活能为66.95 kJ/mol,接近45钢27.89 kJ/mol的2.5倍,同时分析了合金元素对活性C、N原子扩散的影响机理.
参考文献
| [1] | Suhadi A;Li CX;Bell T .Austenitic plasma nitrocarburising of carbon steel in N-2-H-2 atmosphere with organic vapour additions[J].Surface & Coatings Technology,2006(14/15):4397-4405. |
| [2] | Lee I .Post-oxidizing treatments of the compound layer on the AISI 4135 steel produced by plasma nitrocarburizing[J].Surface & Coatings Technology,2004(0):669-674. |
| [3] | K. -T. Rie .Recent advances in plasma diffusion processes[J].Surface & Coatings Technology,1999(1/3):56-62. |
| [4] | Malinova T.;Pantev N.;Malinov S. .Simulation of microhardness profiles for nitrocarburized surface layers by artificial neural network[J].Surface & Coatings Technology,2001(2/3):258-267. |
| [5] | 戴达煌;周克松;袁镇海.现代材料表面技术科学[M].北京:冶金工业出版社,2004 |
| [6] | Rembges W;Oppel W .Process control of plasma nitriding and plasma nitrocarburizing in industry[J].Surface and Coatings Technology,1993,59:129-134. |
| [7] | Krishnaraj N;Iyer K J L;Sundaresan S et al.Optimisation of compound layer thickness for wear resistance of nitrocarburized H1 1 steels[J].WEAR,1998,215:123-130. |
| [8] | Li S.;Manory R.R. .Surface Morphology and Compound Layer Pores of Plasma Nitrocarburized Low Carbon Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(1):135-143. |
| [9] | Bell T;Sun Y;Suhadi A .Environmental and technical aspects of plasma nitrocarburising[J].VACUUM,2000,59:14-23. |
| [10] | Li S;Manory R R .Comparison of compound layer nucleation mechanisms in plasma nitriding and nitrocarburizing:the effect of CHn species[J].Journal of Materials Science,1999,34:1045-1049. |
| [11] | 刘瑞良,闫牧夫,乔英杰.马氏体不锈钢低温表面改性技术研究进展[J].金属热处理,2012(09):1-7. |
| [12] | Ye X M;Wu J Q;Hu J et al.A study of the effect of propane addition on plasma nitrocarburizing for AISI 1045 steel[J].VACUUM,2014,110:74-77. |
| [13] | Fan-Shiong Chen;Kuo-Liang Wang .The kinetics and mechanism of multi-component diffusion on AISI 1045 steel[J].Surface & Coatings Technology,1999(2/3):239-248. |
| [14] | 冯熙,杨浩鹏,吴晓春.SDC99钢离子氮碳共渗及稀土催渗[J].金属热处理,2014(11):103-107. |
| [15] | Sen S;Sen U;Bindal C .An approach to kinetic study of borided steels[J].Surface & Coatings Technology,2005(2/3):274-285. |
| [16] | 夏立方.金属热处理工艺学[M].哈尔滨:哈尔滨工业大学出版社,2008 |
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%