Microstructure and Corrosion Resistance of 40Cr Steel by Laser Melting

Abstract:

Article Preview

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:

Export:

Price:

$35.00

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

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