The effects of additive elements on the microstructure characteristics and mechanical properties of Cr–Fe–C hard-facing alloys

• Published in: Journal of alloys and compounds Vol. 498; no. 1; pp. 30 - 36
• Main Authors: Lin, Chi-Ming, Chang, Chia-Ming, Chen, Jie-Hao, Wu, Weite
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 21-05-2010; Elsevier
• Subjects: Alloys; Applied sciences; Carbides; Chromium base alloys; Colonies; Eutectics; Exact sciences and technology; Hardness; Mechanical properties; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals and alloys; Metals. Metallurgy; Microstructure; Nickel; Powder metallurgy; Mechanical properties; Metals and alloys; Powder metallurgy; Microstructure; High carbon steel; Phase composition; Impurity; Transition element additions; Rupture; Hardness; Indentation; Hard facing alloy
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2010.03.127

The present investigation discusses the effects of V, Mo, and Ni addition on the morphologies and mechanical properties of primary carbides and eutectic colonies in Cr–Fe–C hard-facing alloys with hypereutectic compositions. Findings show that V, Mo, and Ni addition obviously affects the hardness and indentation fracture (
K
C) of primary carbides and eutectic colonies. V addition to alloy A can slightly increase the hardness of primary carbides varying from 1503
±
17 to 1551
±
13 HV but slightly decreases the
K
C value of primary carbides ranging from 3.80
±
0.15 to 3.64
±
0.14
MPa
m
1/2. Mo addition to alloy B can increase the
K
C value of primary carbides ranging from 2.35
±
0.11 to 2.67
±
0.08
MPa
m
1/2. Ni addition to alloy B can decrease the hardness of eutectic colonies varying from 769
±
9 to 608
±
13
HV. Maximum hardness was obtained in the coated surface of alloy B due to the formation of large amounts of primary M
7C
3 carbides.