Paper Title:
Microstructure and Corrosion Resistance of 40Cr Steel by Laser Melting
  Abstract

Laser melting was carryed out by HL-1500 CO2 lase rmachine on 40 Cr steel. The phase composition, microstructure, microhardness and corrosion resistance of the melting coating were investigated by means of scanning electron microscope, X-ray diffractometer, electrochemical test system, salt spray tester etc. The result showed that, melt zone、transformation hardened zone and the heat affected zone as mainly region in melting coating. Laser melting coating constitute by Fe3O4, Fe3C and martensite etc. The microstructure are mixed martensite and undissolved carbides, acicular martensite and retained austenite. The microhardness increased nearly twice as that of the 40Cr when scanning speed is 2.0 m/min. With the increase of the scanning speed, the corrosion resistance increased first and then decreased.

  Info
Periodical
Advanced Materials Research (Volumes 189-193)
Edited by
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Pages
3717-3720
DOI
10.4028/www.scientific.net/AMR.189-193.3717
Citation
X. W. Qiu, "Microstructure and Corrosion Resistance of 40Cr Steel by Laser Melting", Advanced Materials Research, Vols. 189-193, pp. 3717-3720, 2011
Online since
February 2011
Authors
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Price
$32.00
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