Paper Title:
Study on Thermal Fatigue Resistance of Non-Smooth Cast Iron Treated by Laser Surface Alloying of CrNi Powders
  Abstract

The past studies indicated that thermal fatigue resistance of cast irons could be improved by partly laser melting treatment. However the only disadvantage of this technology is that the enhancement of thermal fatigue resistance would be limited because of the fixed chemical composition of sample matrix. For this purpose, the laser surface alloying of CrNi was selected for changing both the compositions and the microstructures of laser treated zone, and the effects of alloy powder compositions on thermal fatigue behavior were also investigated in this paper. The results indicate that the alloy elements distribute homogeneously, and their contents increase markedly in the non-smooth unit on the alloyed layer. The non-smooth unit is strengthened further compared with laser melting treatment. Thermal fatigue resistance of cast iron is enhanced evidently by laser surface alloying of CrNi powders, and for all samples tested, those treated with 25%Cr-75%Ni powders have the best thermal fatigue resistance.

  Info
Periodical
Advanced Materials Research (Volumes 291-294)
Chapter
Laser Processing Technology
Edited by
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
Pages
1405-1411
DOI
10.4028/www.scientific.net/AMR.291-294.1405
Citation
T. Xin, Z. Hong, L. Min, "Study on Thermal Fatigue Resistance of Non-Smooth Cast Iron Treated by Laser Surface Alloying of CrNi Powders", Advanced Materials Research, Vols. 291-294, pp. 1405-1411, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jian Bin Zhang, Ding Fan, Jing Jie Dai, Yao Ning Sun
Abstract:Laser surface alloying is an attractive processing to improve surface hardness, wear and corrosion resistance. In this paper, a continuous...
1148
Authors: Jing Xu, Wen Yan Wang, Jing Pei Xie, Ji Wen Li, Ai Qin Wang
Abstract:The wear resistance, corrosion resistance, high temperature resistance layers were prepared on the surface of ductile iron via laser alloying...
413
Authors: Wen Yan Wang, Xiao Ming Dong, Jing Pei Xie
Abstract:A ductile iron coated with metal-matrix pastes containing hard phase TiC and CrxCy was laser alloyed by an Nd: YAG laser and a CO2 laser. The...
1182
Authors: Wen Yan Wang, Xiao Ming Dong, Jing Pei Xie, Jing Xu, Luo Li Li
Abstract:Using sub-micron WC/Co metal ceramic composite as coating materials for laser alloying experiments to prepare high hardness and wear...
643
Authors: Yue Yang, Jian Dong Hu
Abstract:Laser processing of Ni-P layer electroless deposited on aluminum substrate was carried out by Nd-YAG pulsed laser. Different laser processing...
539