Antifriction properties of aluminum alloys after surface laser alloying

1991 ◽  
Vol 33 (10) ◽  
pp. 772-776 ◽  
Author(s):  
Ya. D. Kogan ◽  
Z. S. Sazonova ◽  
V. D. Aleksandrov ◽  
T. M. Borovskaya
Keyword(s):  
Aluminum Alloys ◽  
Laser Alloying ◽  
Antifriction Properties ◽  
Surface Laser

Effect of different laser energy densities on the corrosion resistance of aluminum alloys

2020 ◽  
Vol 67 (5) ◽  
pp. 437-444
Author(s):  
Di Xie ◽  
Hui Chen ◽  
Siyi Yin ◽  
Feisen Wang ◽  
Jingwen Chen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Energy Density ◽  
Surface Cleaning ◽  
Laser Cleaning ◽  
Chemical Cleaning ◽  
Content Type ◽  
Cleaning Equipment ◽  
Surface Laser

Purpose Laser cleaning, as a new type of cleaning technology, has the advantages of environment-friendliness, better selectivity, better controllability and higher efficiency compared to traditional chemical cleaning or grinding. This paper aims to use ultra-fast surface laser cleaning equipment built in laboratory to study the influence of different energy density (7.6, 11.5 and 15.3 J/cm2) on corrosion resistance of the aluminum alloy A7N01P-T4, a high-speed train body material. Design/methodology/approach SEM, white light interferometer, EDS and XPS were used to analyze the surface morphology, roughness, element content and oxide layer composition of aluminum alloy before and after cleaning. The corrosion resistance was studied by electrochemical experiments and exfoliation corrosion experiments. Findings The results showed that new oxide scale was formed on the surface after laser cleaning. The changes of surface roughness and chemical composition of oxide scale made a significant influence on corrosion behaviors. Better corrosion resistance was obtained with the energy density increased, and at the energy density of 11.5 J/cm2, aluminum alloy exhibited the best corrosion resistance. Research limitations/implications The paper only studies specific aluminum alloys and is not universal. Laser cleaning equipment is set up for the laboratory and has not yet been put into industrial production. Practical implications This paper indicated that ultra-fast laser processing was a new direction for the development of industrial equipment surface cleaning and carried out ultra-fast laser of aluminum alloy surface cleaning had certain research significance for its corrosion resistance. Social implications Compared with the conventional cleaning methods such as air abrasives grinding or chemical cleaning, laser cleaning has advantages of environment-friendliness, better selectivity, better controllability and higher efficiency. Laser cleaning can not only protect the environment, but also improve cleaning efficiency. Originality/value Changes in the surface of aluminum alloys after ultra-fast surface laser treatment were found, and the mechanism of changes in aluminum alloy corrosion properties was clarified.

Getting wear-resistant coatings on aluminum alloys by laser alloying

2021 ◽  
Vol 2021 (9) ◽  
pp. 42-48
Author(s):  
Larisa Petrova ◽  
Victor Alexandrov ◽  
Maxim Morshchilov
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloys ◽  
Laser Surface ◽  
Optimal Selection ◽  
Laser Alloying ◽  
Surface Alloying ◽  
Laser Surface Alloying ◽  
Wear Resistant Coatings ◽  
Selection Of ◽  
Hardened Surface

A method to improve the properties of aluminum alloys by laser surface alloying is considered. The optimal selection of alloying elements is carried out. It is shown that this method of hardening increases the wear resistance and reduces the friction ratio of the hardened surface.

Laser Alloying of the Surface Layers of Aluminum Alloys for Improving Their Wear Resistance

2020 ◽  
Vol 2020 (13) ◽  
pp. 1496-1501
Author(s):  
V. D. Aleksandrov ◽  
L. G. Petrova ◽  
M. V. Morshchilov ◽  
A. S. Sergeeva
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloys ◽  
Laser Alloying ◽  
Surface Layers

Principles for creation of high-strength coatings for friction units

2020 ◽  
pp. 272-276
Author(s):  
O.V. Chudina
Keyword(s):  
Wear Resistance ◽  
Crack Resistance ◽  
Surface Hardness ◽  
High Strength ◽  
Structural Theory ◽  
Laser Alloying ◽  
Friction Units ◽  
Surface Laser

The concept for creating of high-strength coatings based on the structural theory of strength is proposed. It allows purposefully forming structure, that can effectively resist wear and fatigue. Surface laser alloying of steels with subsequent nitriding is studied. The increase in surface hardness, strength, wear resistance by 15 times and crack resistance by 1.5 times is shown in comparison with the standard parameters of steels.

scholarly journals Modification of surface layer in aluminum alloys by electroerosion coating

2016 ◽  
Vol 1 (4) ◽  
pp. 14-21
Author(s):  
А. Норман ◽  
A. Norman ◽  
В. Смоленцев ◽  
V. Smolentsev ◽  
В. Золотарев ◽  
...  
Keyword(s):  
Surface Layer ◽  
Aluminum Alloy ◽  
Cast Iron ◽  
Aluminum Alloys ◽  
Coating Process ◽  
Fusion Temperature ◽  
Friction Units ◽  
Antifriction Properties ◽  
Iron Coatings ◽  
Active Substances

The mechanism of plating on low-melting alloys (for example, aluminum) cast-iron coatings having a high fusion temperature is considered. By means of this method one achieves in light aluminum alloy parts higher performance attributes to which belong reliable protection of parts with a coating against aggressive influence of chemically active substances. Besides, antifriction properties of parts operating in friction units are improved. The technological modes are developed and a coating process is designed. The example of the method offered is shown.

AZ31 Magnesium Alloy Surface Laser Alloying of SiC-316L Composite Coating

2012 ◽  
Vol 538-541 ◽  
pp. 243-246
Author(s):  
Guang Yao Xiong ◽  
Meng Yu ◽  
Long Zhi Zhao
Keyword(s):  
Magnesium Alloy ◽  
Organizational Structure ◽  
Good Condition ◽  
Az31 Magnesium Alloy ◽  
Layer Surface ◽  
Alloyed Layer ◽  
Laser Alloying ◽  
Interface Zone ◽  
Surface Laser ◽  
Columnar Grain

AZ31 magnesium alloy preset SiC-316L powder by laser alloying on the surface treatment. The organizational structure and composition of alloying layer material by XRD, SEM and EDS phase were analyzed. The results show that the alloying layer surface has roughness, lap in good condition, no pilling, pores and cracks defect, etc. Alloying layer is mainly composed of the original phase Mg, Fe, SiC and the oxides of MgO and SiO2. The columnar grain zone perpendicular to the interface and pointing to the alloyed layer. It is formed in the bottom of the alloyed layer and the interface zone of magnesium alloy substrate.

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