Preparing of NiAl and Ni3Al Intermetallic Composite Coatings by Laser Cladding In Situ Synthesis

2011 ◽  
Vol 239-242 ◽  
pp. 636-641 ◽  
Author(s):  
Guang Ping Cheng ◽  
Yi Zhu He
Keyword(s):  
Laser Cladding ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Exothermic Reaction ◽  
In Situ Synthesis ◽  
Compound Coatings ◽  
Intermetallic Composite ◽  
Two Phases ◽  
Mild Steel Substrate

Ni-Al intermetallic compound coatings no visible cracks, pores or inclusions are prepared on mild steel substrate by Laser- cladding in situ synthesis with mixed powders of nickel-coated aluminum, Ni-based alloy and Al. The results show that the microstructure of the coating consists mainly of two phases of NiAl and Ni3Al, and the former amount is more than the latter, with NiAl being uniformity and staggered fine dendrites which are surrounded continuously by Ni3Al, and the atom ratios of Ni∶Al∶Fe∶Si in NiAl and Ni3Al are respectively 54∶39∶2∶5 and 70∶21∶3∶6. Compared with cladding nickel-coated aluminum, the coatings quality are improved, and the dilution of iron from substrate into coating are greatly reduced, as a result of lower cladding powers due to self-fluxing of Ni-based alloy and exothermic reaction between Ni and Al. The hardness of coatings are up to HV490-HV540.

Fabrication of in-situ TiN ceramic particle reinforced high entropy alloy composite coatings by laser cladding processing

2021 ◽  
pp. 1-22
Author(s):  
Xinhong Wang ◽  
S. S. Liu ◽  
G. L. Zhao ◽  
M. Zhang
Keyword(s):  
Laser Cladding ◽  
Phase Structure ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Ceramic Particle ◽  
304 Stainless Steel ◽  
High Entropy Alloy ◽  
Laves Phases ◽  
High Entropy

Abstract In-situ TiN ceramic particle reinforced FeCoNiCrMnTi high entropy alloy coating was fabricated by laser cladding processing at high purity nitrogen gas atmosphere on the AISI 304 stainless steel substrate. The effect of Ti addition on the microstructure, phase structure and wear properties of the coatings were investigated. The results showed that phase structure of the coatings were mainly FCC-type γ phase. A few of cubic or flower-like TiN ceramic were formed after adding titanium into the FeCoNiCrMn powder. When atomic ratio of Ti exceeds 0.5, Laves phases appeared in the coatings. With increasing of Ti, the micro-hardness and wear resistance of the coatings increased, but friction coefficient and crack resistance of the coatings reduced. Suitable Ti content in the FeCoNiCrMnTix, laser composite coating had higher resistance to adhesive wear, oxidation wear and cracking resistance.

In-Situ Synthesis of TiC-ZrC Particulate Reinforced Ni-Based Composite Coatings by Laser Cladding

2009 ◽  
Vol 36 (4) ◽  
pp. 998-1004 ◽  
Author(s):  
张现虎 Zhang Xianhu ◽  
晁明举 Chao Mingju ◽  
梁二军 Liang Erjun ◽  
袁斌 Yuan Bin
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
In Situ Synthesis ◽  
Particulate Reinforced

In-situ synthesis of Nb(C,N) ceramic particulates reinforced Fe-based composite coatings by laser cladding

2012 ◽  
Vol 24 (11) ◽  
pp. 2735-2740
Author(s):  
Li Guihua ◽  
Zou Yong ◽  
Zou Zengda ◽  
Wei Xiwang ◽  
Li Xiaonan
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
In Situ Synthesis

Investigation on In-Situ Synthesis of Cr3C2-CrB Reinforced Ni-Based Composite Coatings by Laser Cladding

2009 ◽  
Vol 36 (1) ◽  
pp. 231-237 ◽  
Author(s):  
敬晓定 Jing Xiaoding ◽  
晁明举 Chao Mingju ◽  
孙海勤 Sun Haiqin ◽  
张现虎 Zhang Xianhu ◽  
梁二军 Liang Erjun
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
In Situ Synthesis

Microstructure and high-temperature oxidation resistance of laser cladding in-situ synthesis Ti-Al-Si composite coatings

2019 ◽  
Vol 27 (2) ◽  
pp. 316-325
Author(s):  
刘洪喜 LIU Hong-xi ◽  
赵艳爽 ZHAO Yan-shuang ◽  
张晓伟 ZHANG Xiao-wei ◽  
郝轩宏 HAO Xuan-hong ◽  
张璐璐 ZHANG Lu-lu
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
High Temperature Oxidation ◽  
Composite Coatings ◽  
In Situ Synthesis ◽  
Temperature Oxidation

Laser cladding Ni-base composite coatings reinforced by in-situ synthesized multiple carbide particles

2008 ◽  
Author(s):  
Ruiquan Kang ◽  
Mingxing Ma ◽  
Wenjin Liu ◽  
Minlin Zhong ◽  
Yide Kan ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
Base Composite ◽  
Carbide Particles

Fabrication of SiC Particulates Reinforced MoSi2 Composite Coating by Laser Cladding

2008 ◽  
Vol 373-374 ◽  
pp. 304-307
Author(s):  
Sen Yang ◽  
Ming Run Wang ◽  
Tao Gong ◽  
Wen Jin Liu
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Continuous Wave ◽  
Steel Substrate ◽  
Laser Output Power ◽  
Scanning Velocity ◽  
Sic Particulates ◽  
Metallurgical Bond ◽  
Improve Wear Resistance

In order to improve wear resistance of carbon steel, laser cladding experiments were carried out using a 3kW continuous wave CO2 laser. The diameter of the laser beam was 3-5mm, the scanning velocity was 3-10mm/s, and the laser output power was 1.0-1.3kW. The experimental results showed that MoSi2/SiCP composites coating could be in-situ synthesized from mixture powders of molybdenum, silicon and SiC by laser cladding. A good metallurgical bond between the coating and the substrate could be achieved. The microstructures of the coating were mainly composed of MoSi2, SiC and FeSiMo phases. The average microhardness of the coating was about HV0.21300, about 6.0 times larger than that of steel substrate.

scholarly journals Optimization of Ni-Based WC/Co/Cr Composite Coatings Produced by Multilayer Laser Cladding

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Andrea Angelastro ◽  
Sabina L. Campanelli ◽  
Giuseppe Casalino ◽  
Antonio D. Ludovico
Keyword(s):  
Laser Cladding ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Metallic Matrix ◽  
Optimization Procedure ◽  
High Hardness ◽  
Fatigue Properties ◽  
Metal Composite ◽  
Tungsten Carbides ◽  
Cobalt Chromium

As a surface coating technique, laser cladding (LC) has been developed for improving wear, corrosion, and fatigue properties of mechanical components. The main advantage of this process is the capability of introducing hard particles such as SiC, TiC, and WC as reinforcements in the metallic matrix such as Ni-based alloy, Co-based alloy, and Fe-based alloy to form ceramic-metal composite coatings, which have very high hardness and good wear resistance. In this paper, Ni-based alloy (Colmonoy 227-F) and Tungsten Carbides/Cobalt/Chromium (WC/Co/Cr) composite coatings were fabricated by the multilayer laser cladding technique (MLC). An optimization procedure was implemented to obtain the combination of process parameters that minimizes the porosity and produces good adhesion to a stainless steel substrate. The optimization procedure was worked out with a mathematical model that was supported by an experimental analysis, which studied the shape of the clad track generated by melting coaxially fed powders with a laser. Microstructural and microhardness analysis completed the set of test performed on the coatings.

Properties of in-situ formed TiC-VC particle reinforced Fe-based alloy composite coatings produced by laser cladding on 42CrMo roller

2013 ◽  
Vol 25 (11) ◽  
pp. 2856-2860
Author(s):  
张辉 Zhang Hui ◽  
邹勇 Zou Yong ◽  
邹增大 Zou Zengda ◽  
王振坤 Wang Zhenkun
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
Alloy Composite
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