采用预置粉末的方法,在45号钢表面激光熔覆304不锈钢涂层,通过调整各项工艺参数得到了表面平整光滑与基体结合紧密的熔覆层.分析和解释了不同扫描速度对熔覆层及热影响区截面尺寸的影响规律；研究了扫描速度对稀释率的影响.结果表明:当速度为800 mm/min时,稀释率出现极值11.1％,当扫描速度为600 mm/min和1000 mm/min时,稀释率接近于合理值10％；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为5～8 μm的致密细小的等轴晶过渡；热影响区分为淬火区和正火区,分别由细小针状马氏休组织和细小的铁素体组成,基材由铁素体和珠光体组成.
参考文献
| [1] | Reinhart Poprawe.激光制造工艺[M].北京:清华大学出版社,2008 |
| [2] | Girish R. Desale;C. P. Paul;B. K. Gandhi;S. C. Jain .Erosion wear behavior of laser clad surfaces of low carbon austenitic steel[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2009(9/10):975-987. |
| [3] | Boussaha E;Aouici S;Bahloul A et al.Optimization of geometrical features of laser cladding obtained by powder injection[J].Physics Procedia,2009,2(03):1147-1152. |
| [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] | 黄小伟,习俊通,J. L. Lebrun,Elcheikh Hussam,Courant Bruno.工艺参数对激光熔覆成形316L不锈钢形状的影响规律[J].激光与光电子学进展,2011(07):114-119. |
| [6] | Anjos M A;Vilar R;Qiu Y Y .Laser cladding of ASTM S31254 stainless steel on a plain carbon steel[J].Surface and Coatings Technology,1997,92(1-2):142-149. |
| [7] | Hemmati, I.;Ocelík, V.;De Hosson, J.T.M. .The effect of cladding speed on phase constitution and properties of AISI 431 stainless steel laser deposited coatings[J].Surface & Coatings Technology,2011(21/22):5235-5239. |
| [8] | 余先涛 .铝合金表面激光熔覆Ni基合金及其摩擦学特性研究[D].武汉理工大学,2005. |
| [9] | 徐成伟,王振全,胡欣,黄成功.1Cr17Ni2不锈钢表面激光熔覆层的微观组织和性能研究[J].表面技术,2011(01):11-13,33. |
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%