The influence of carbides on the microstructure, grain growth, and oxidation resistance of nanostructured carbides-strengthened cobalt-based multi-track laser-cladding layers

2019 ◽  
Vol 469 ◽  
pp. 495-504 ◽  
Author(s):  
Yuzhen Zhang ◽  
Peiquan Xu ◽  
Chuangen Liu ◽  
Jiangwei Ren ◽  
Hongying Gong
Keyword(s):  
Grain Growth ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
Cladding Layers

Microstructure and Properties of Fe-Based Laser Cladding Coatings Reinforced by In Situ Synthesized Multiphase Ceramic Particles

2010 ◽  
Vol 150-151 ◽  
pp. 1429-1432
Author(s):  
Gui Hua Li ◽  
Yong Zou ◽  
Zeng Da Zou ◽  
Xu Wei Dong
Keyword(s):  
Oxidation Resistance ◽  
Laser Cladding ◽  
Composite Coatings ◽  
Wear Test ◽  
X Ray Diffraction ◽  
Ceramic Particles ◽  
X Ray ◽  
42Crmo Steel ◽  
Cladding Layers

The Fe-based composite coating reinforced by in situ synthesized multiphase ceramic particles has been successfully prepared by laser cladding preplaced powder on 42CrMo steel. The experimental results of X-ray diffraction and scanning electron micrograph indicate the coating is consisted by γ-Fe phase and Fe-Cr fine phase which possesses the better oxidation resistance and corrosion resistance. In-situ synthesized V(C,N), Cr2B3 and Cr3C2 particulates which are uniformly distributed in the composite coatings. The wear test showed that these reinforcement particulates improved significantly wear resistance of the coatings. The wear mass loss of the coating is about one tenth of the 42CrMo substrate. Laser cladding layers have better oxidation resistance. The oxide scale of the coatings is one eighth of the substrate through 750 constant temperature for 120h oxidation.

Research Status of Subsequent Machining of Laser Cladding Layers

2020 ◽  
Vol 15 ◽  
Author(s):  
Lei Li ◽  
Yujun Cai ◽  
Guohe Li ◽  
Meng Liu
Keyword(s):  
Tool Wear ◽  
Surface Quality ◽  
Laser Cladding ◽  
Wear Surface ◽  
Chip Formation ◽  
Cutting Temperature ◽  
Dimensional Accuracy ◽  
Cutting Parameters ◽  
Cladding Layer ◽  
Cladding Layers

Background: As an important method of remanufacturing, laser cladding can be used to obtain the parts with specific shapes by stacking materials layer by layer. The formation mechanism of laser cladding determines the “Staircase effect”, which makes the surface quality can hardly meet the dimensional accuracy of the parts. Therefore, the subsequent machining must be performed to improve the dimensional accuracy and surface quality of cladding parts. Methods: In this paper, chip formation, cutting force, cutting temperature, tool wear, surface quality, and optimization of cutting parameters in the subsequent cutting of laser cladding layer are analyzed. Scholars have expounded and studied these five aspects but the cutting mechanism of laser cladding need further research. Results: The characteristics of cladding layer are similar to that of difficult to machine materials, and the change of parameters has a significant impact on the cutting performance. Conclusion: The research status of subsequent machining of cladding layers is summarized, mainly from the aspects of chip formation, cutting force, cutting temperature, tool wear, surface quality, and cutting parameters optimization. Besides, the existing problems and further developments of subsequent machining of cladding layers are pointed out. The efforts are helpful to promote the development and application of laser cladding remanufacturing technology.

Microstructure and Hardness of the ZrO2/Ni60A Composite Coating Formed by Feeding Powder Laser-Clad on Circular Surface

2011 ◽  
Vol 138-139 ◽  
pp. 732-736
Author(s):  
Ba Sheng Ouyang ◽  
Run Juan You
Keyword(s):  
Laser Cladding ◽  
Ceramic Powder ◽  
Scanning Speed ◽  
Micro Hardness ◽  
Processing Property ◽  
Laser Process ◽  
Cladding Layer ◽  
Parameter Variations ◽  
Circular Surface ◽  
Cladding Layers

Cladding experiment with parameter variations was presented to manufacture the better processing property coating by laser cladding self-fused Ni-based ceramic powder of ZrO2 composite on the excircle surface of 304 SUS. The influence of the laser process parameters on macroscopic view, microstructure and micro-hardness of the laser cladding layers were investigated. The results show that we can get better coating when laser power is 1.5KW, and that the cladding layer microstructure has the trend of refined framework with the growing of scanning speed; micro-hardness will be higher and distribution from substratum to surface with little fluctuate by optimizing scanning speed.

Experimental characterizations of laser cladding of iron- and nickel-based alloy powders on carbon steel 1045 for remanufacturing

2016 ◽  
Vol 232 (12) ◽  
pp. 1023-1035 ◽  
Author(s):  
Mingsan Xu ◽  
Jibin Jiang ◽  
Bingbing Li ◽  
Weilong Cong ◽  
Dongdong Zhang
Keyword(s):  
Carbon Steel ◽  
Laser Cladding ◽  
Orthogonal Design ◽  
Substrate Material ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Cladding Layer ◽  
Bonding Shear Strength ◽  
Steel Substrates ◽  
Cladding Layers

The purpose of this investigation is to test the laser cladding of different alloy powders onto 1045 medium-carbon steel substrates for parts remanufacturing. The types of alloy powder, laser output powers, and scanning speeds are selected as influencing factors to conduct laser cladding experiments with orthogonal design on the carbon steel 1045 substrate. Bonding shear strength and microhardness of the cladding layer and the substrate are tested and analyzed. The high resolution scanning electron microscopy and energy dispersive X-ray spectroscopy are also used to analyze cladding layers, microstructures, and elements. The experimental results show that a good metallurgical bond is formed between the cladding layer and the substrate without porous cracks and other defects. Shear stress intensity of nickel-based powder is two to three times higher than that of substrate material, while iron-based powder is five times higher than the substrate material. The type of the powder is the most significant factor and laser power is the least. The hardness of outer cladding layer is higher than that of bonding section and inner section. In the heat-affected zone, hardness is higher than that of the substrate material.

Thermal stability and oxidation resistance of FeCrxCoNiB high-entropy alloys coatings by laser cladding

2019 ◽  
Vol 359 ◽  
pp. 132-140 ◽  
Author(s):  
Fa Chang ◽  
Bingjie Cai ◽  
Chong Zhang ◽  
Biao Huang ◽  
Shuai Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
High Entropy Alloys ◽  
High Entropy

Effects of Laser Cladding Layers Width on Total Indicated Runout Characteristics of Steam Turbine Rotor Surface

2017 ◽  
Vol 46 (3) ◽  
pp. 612-616
Author(s):  
Guo Shirui ◽  
Shang Huichao ◽  
Cui Lujun ◽  
Guo Xiaofeng ◽  
Yao Jianhua
Keyword(s):  
Steam Turbine ◽  
Laser Cladding ◽  
Turbine Rotor ◽  
Steam Turbine Rotor ◽  
Rotor Surface ◽  
Cladding Layers

Microstructure, wear and oxidation resistance of Al-doped Ti–Si3N4 coatings by laser cladding

2021 ◽  
pp. 127942
Author(s):  
Lixin Wang ◽  
Yiming Huang ◽  
Yuxue Yuan ◽  
Chenpeng Jia ◽  
Lijun Yang
Keyword(s):  
Oxidation Resistance ◽  
Laser Cladding

Evolution mechanisms of TiC ceramic particles in FeCoCrNiAl high-entropy alloy laser cladding layers

2019 ◽  
Vol 6 (10) ◽  
pp. 1065d2 ◽  
Author(s):  
Yangchuan Cai ◽  
Sansan Ao ◽  
Sunusi Marwana Manladan ◽  
Jichao Xue ◽  
Zhen Luo
Keyword(s):  
Laser Cladding ◽  
High Entropy Alloy ◽  
Ceramic Particles ◽  
High Entropy ◽  
Cladding Layers

scholarly journals Effect of Heat Treatment on Microstructure and Tribocorrosion Performance of Laser Cladding Ni-65 WC Coating

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ze Liu ◽  
Eryong Liu ◽  
Shuangming Du ◽  
Congwei Li ◽  
Huiling Du ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Laser Cladding ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Bonding Layer ◽  
Wear Performance ◽  
Comprehensive Comparison ◽  
Cladding Layers

The Ni-65wt%WC cladding layers were prepared on the surface of Q235 using laser cladding technology, in which the effect of heat treatment on microstructure and tribocorrosion performance was investigated. The results showed that the coating is mainly consisted of Ni, WC, and W2C, and a significant diffusion phenomenon is formed between the interfaces of WC/Ni matrix, benefited for the improvement of bonding layer between WC/Ni-based matrixes. Meanwhile, the crystallization of WC particles after heat treatment was more obvious than untreatment; the Ni matrix grain size was also grown remarkable, leading to the lower hardness and weaker plastic deformation resistance of Ni-65wt%WC coating. And the erosion results showed that the wear rate of coating gradually decreased with heat treatment temperature increasing, while brittle WC was not suitable for high impact wear conditions. Furthermore, with the increase of heat treatment temperature, the reciprocating wear performance showed that the friction coefficient and wear rate of Ni-65wt%WC coating decreased. And the friction coefficient and wear rate of the coating (700°C) in 3.5% NaCl solution were 0.15 and 4.82×10−8 mm3·N-1·m-1, respectively. Therefore, the comprehensive comparison showed that Ni-65WC coating had better performance in low impact reciprocating testing under corrosion environment, and heat treatment was helpful to further improve the tribocorrosion performance of laser cladding Ni-65wt%WC coating.

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