Paper Title:
Effect of K / Na on Primary Boride of Hypereutectic High-Boron Alloy
  Abstract

High-alloy materials such as high chromium cast iron and high speed steel have excellent wear resistance under extreme wear conditions. But they consume much expensive chromium, molybdenum, tungsten and other alloying elements too. The hypereutectic high boron alloy has good wear resistance because it contains many high hardness primary borides. But the dimension of primary borides is big. In this paper, the hypereutectic high boron alloy was prepared using sand casting method, and the primary borides were modified by different amount of K / Na modificator. The results show that the primary boride of hypereutectic high boron alloy is Fe2B. K/Na modificator has a significant influence on primary Fe2B. The best grain refinement effect of primary Fe2B is obtained when the amount of K/Na modificator is 0.3%. The refining mechanism of primary Fe2B is that K/Na modificators can not only increase the supercooling degree to improve nucleation rate but attach to the crystal face of fastest growth direction to prevent grain from growing

  Info
Periodical
Chapter
Chapter 7: Functional Materials
Edited by
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
Pages
1406-1409
DOI
10.4028/www.scientific.net/AMM.117-119.1406
Citation
L. J. Xu, B. Y. Li, J. W. Li, G. S. Zhang, S. Z. Wei, "Effect of K / Na on Primary Boride of Hypereutectic High-Boron Alloy", Applied Mechanics and Materials, Vols. 117-119, pp. 1406-1409, 2012
Online since
October 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: Xiao Ping Luo, Lan Ting Xia, Ming Gang Zhang
Abstract:The effect of Cd and Sb addition on the microstructural and mechanical properties of as-cast AZ31 alloys was investigated and compared. The...
197
Authors: Chang Jiang Song, Yuan Yi Guo, Liang Zhu, Ke Feng Li, Min Yang, Qi Jie Zhai
Abstract:High chromium cast iron alloys are widely used to produce wear resistant components. However, formation of the large carbides restricts their...
44
Authors: Yan Wei Sui, Ai Hui Liu, Bang Sheng Li, Jing Jie Guo, Wei Biao Ju
Chapter 1: Materials Properties
Abstract:Ti-6Al-4V alloy castings are made by means of induction melting technology. The relationships between grain size and tensile strength, yield...
496
Authors: Rui Na Ma, Sha Sha Jin, Hong Yun Li
Metal Alloy Materials
Abstract:The static constant corrosion tests on Fe-B eutectic alloy are investigated in liquid zinc at 500°C. The systematic observation and research...
805
Authors: S.G. Shabestari, R. Gholizadeh
Chapter 2: Forming in Melt or Near Melt Condition
Abstract:Dense precipitation of various intermetallic compounds is a common feature in the microstructure of Al-Si piston alloys. In this...
289