Bonding strength studies for laser cladding dies

1998 ◽  
Author(s):  
Yu Zhang ◽  
Yuan Xiangkai ◽  
Zeng Xianghua
Keyword(s):  
Laser Cladding ◽  
Bonding Strength

Development of a novel method for measuring the interfacial bonding strength of laser cladding coatings

2022 ◽  
Vol 148 ◽  
pp. 107699
Author(s):  
M.H. Nie ◽  
S. Zhang ◽  
Z.Y. Wang ◽  
H.F. Zhang ◽  
C.H. Zhang ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Bonding Strength ◽  
Interfacial Bonding ◽  
Interfacial Bonding Strength ◽  
Novel Method

scholarly journals Laser Cladding and Anti-Laser Ablative Behaviour of Si-SiC-MoSi2-ZrB2 Composite Coatings on Carbon Surface

2020 ◽  
Author(s):  
Qixuan Wang ◽  
Yi Zhuo ◽  
Wenhao Wang ◽  
Litong Guo ◽  
Xueyu Tao ◽  
...  
Keyword(s):  
Weight Loss ◽  
Laser Ablation ◽  
Oxide Layer ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Loss Rate ◽  
Composite Coatings ◽  
Carbon Surface ◽  
Weight Loss Rate ◽  
Coating Surface

Abstract A Si-SiC-MoSi2-ZrB2 antioxidation composite coating was fabricated by laser cladding technology on the graphite matrix surface, and laser ablation was carried out on the coating surface to evaluate the anti-ablation capability of the coating surface. The phase transformation, microstructure reconstruction and the change of binding strength between the coating and the matrix during the laser cladding and ablation were investigated. The coating of Si-SiC-MoSi2 series modified by 40wt% ZrB2 had the lowest weight loss rate and the highest coating bonding strength. The oxide mostly existed in amorphous form after laser cladding, and the semi-melting particles in laser path lap zone on the coating surface disappeared. The oxide layer peeled off and Mo-Zr-Si-O composite glass phase was formed on the coating surface. The internal microstructure of the coating co-existed with non-oriented fine needle-like dendrites and irregular particles, which improved the coating strength. After laser ablation, the coating modified by 40wt% ZrB2 had lower weight loss rate and higher scratch bonding strength compared with the unmodified coating of Si-SiC-MoSi2 series, which indicated that the ablation resistance of the coating was improved by the formation of continuous oxide layer on the surface.

The Bioactivity of Gradient Composite Bioceramic Coating with Different Contents of Multiple Rare Earth Deoxide Fabricated by Wide Band Laser Cladding

2013 ◽  
Vol 706-708 ◽  
pp. 318-322 ◽  
Author(s):  
Ling Yan Zhang ◽  
Qi Bin Liu
Keyword(s):  
Titanium Alloy ◽  
Rare Earth ◽  
Thermal Stress ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Wide Band ◽  
Experimental Results ◽  
Spherical Particles ◽  
Coating Materials ◽  
Gradient Coating

To improve bonding strength between titanium alloy and coating and to eliminate thermal stress during laser cladding, a gradient coating materials is designed. And the gradient coating with different contents of multiple rare earth deoxide was produced by wide band laser cladding technique. The experimental results indicate that when addition of Sm2O3 is fixed to 0.3wt.%, as addition of Y2O3 increases, the microstructure of bioceramic is different. When addition of Y2O3 reaches 0.4wt.%, the amount of Ca-P based bioactive phases such as HA, α-TCP as well as β-TCP becomes biggest. After soaking the coating with 0.3wt.% Sm2O3 and 0.4wt.% Y2O3 in SBF for 14 days, a large amount of Ca-P white spherical particles can be observed on coating, which demonstrates the bioceramic coating is of best bioactivity.

Researches on the Temperature Field during the Process of Reparation by Laser Cladding through Simulation and Experiments

2017 ◽  
Vol 893 ◽  
pp. 281-288
Author(s):  
Xiang Zhang ◽  
Wei Fu ◽  
Qi Lin Deng
Keyword(s):  
Temperature Field ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Thermal Deformation ◽  
Process Temperature ◽  
Cladding Layer ◽  
Metallurgical Bonding ◽  
Laser Cladding Process

During the laser cladding process, temperature field is an issue worth thorough research. An optimized temperature field can not only ensure the high metallurgical bonding strength between the cladding layer and the substrate, but also can produce relatively mild thermal deformation for the parts to be repaired. This work theoretically analyzes the temperature field during the cladding process and validate the analysis through the microstructure of the cladding layer.

Mechanical Properties on Gradient Bioceramic Composite Coating Produced by Wide-Band Laser Cladding

2007 ◽  
Vol 342-343 ◽  
pp. 681-684 ◽  
Author(s):  
Qi Bin Liu ◽  
Bang Cheng Yang
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Bending Strength ◽  
Wide Band ◽  
Composition Gradient ◽  
Ti Alloy ◽  
Coating Composition ◽  
Gradient Coatings ◽  
Elastic Modules

To eliminate thermal stress during laser cladding and to raise the bonding strength between substrate and coating, composition gradient coatings are designed and fabricated by using wideband laser cladding technique on a Ti alloy. And mechanical properties on coating is studied. The experimental results indicate that the bonding strength between coating and substrate is fairly high, above 38.8MPa. The highest microhardness is obtained for coating containing 0.6wt.% Y2O3 1062HV0.1 and 1405HV0.1, respectively at bioceramic coating and alloyed transition layer. The average tensile strength, bending strength, and elastic modules of coatings are 767.83MPa, 1671.65MPa, and 13.98GPa, respectively.

The Microstructure of Gradient Composite Bioceramic Coating with Single and Multiple Rare Earth Oxide Fabricated by Wide Band Laser Cladding

2013 ◽  
Vol 341-342 ◽  
pp. 171-174
Author(s):  
Ling Yan Zhang ◽  
Qi Bin Liu ◽  
Pei Ze Jiang ◽  
Zheng Zhang
Keyword(s):  
Rare Earth ◽  
Thermal Stress ◽  
Coral Reef ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Wide Band ◽  
Rare Earth Oxide ◽  
Spherical Particles ◽  
Ti Alloy ◽  
Coating Materials

To improve bonding strength between Ti alloy and bioceramic coating and to eliminate thermal stress during laser cladding, gradient bioceramic coating materials is designed. The bioceramic coating is fabricated by wide band laser cladding technique. And the effect of adding single and multiple rare earth oxide on microstructure is investigated. The samples are soaked with SBF for 14 days, the experimental results indicate that when the content of single rare earth oxide is 0.6wt.%Y2O3, a large number of bioactivity phase and chrysanthemum shape microstructure can be observed. When the content of single rare earth oxide is 0.2wt.%Sm2O3, a lot of bioactivity phase and coral reef shape microstructure can be observed. When the content of multiple rare earth oxide is 0.3wt.%Sm2O3 and 0.4wt.%Y2O3, a large amount of bioactivity phase and more homogeneous and dense spherical particles can be observed on coating, which demonstrates the microstructure is of better bioactivity.

Microstructure of SiC/Al composite coating by CO2 laser cladding

2004 ◽  
Author(s):  
Yang Xi-Chen ◽  
Li Hui-Shan ◽  
Wang Yun-Shan ◽  
Ma Bing ◽  
Yi Ying-Hui
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Co2 Laser ◽  
Al Composite
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