Search academic texts

Registration Number

0221U105629, 0120U104448 , R & D reports

Title

Innovative surfacing and welding processes.

popup.stage_title

Head

Chigarev Valerii V., Доктор технічних наук

Registration Date

29-07-2021

Organization

State Higher Educational Institution "Azov State Technical University"

popup.description2

 Research Object - surfacing and welding of steels and alloys. A purpose of work - an increase of reliability of details of machines. A research method is microanalysis, tests for mechanical properties, computational and experimental research, mathematical methods of data processing. The formation of the connection of aluminum with steel in vacuum is considered in the work and the estimation of the change of hardness in the welding zone is given. The regularities of the influence of the deposited metal thickness and linear energy on the welding stresses and crack resistance of the rolls are established. As the thickness of the weld metal and the linear energy increase, the welding stresses increase, which leads to the formation of cracks and delamination of the weld metal. The process of high-speed surfacing at low running energy has been developed. The comparison of sanitary and hygienic characteristics during welding of aluminum tires is given, which showed significant advantages of the process of automatic submerged arc welding in closed arc in comparison with manual arc welding with a carbon electrode. The factors of the welding mode that affect the formation of the weld during butt welding were studied. The comparison of wire electrodes with tape electrodes during copper surfacing is investigated. It is established that powder tape electrodes have certain advantages and differences. It was found that unilateral high-speed welding increases the crystallization rate, the grains do not have time to grow, which provides grinding of the microstructure, reducing the interatomic distance, increasing the contact area of atoms, interatomic bonds and increasing the toughness of welds. The process of unilateral high-speed welding of pipes for gas and oil pipelines has been developed. The development of the composition of the ceramic flux, which reduces the cost of restoring machine parts and structures.

Product Description

popup.authors

Alistratov Valerij M
Bilyk Oleksandr G
Zusin Anton M
Zusin Vladimir Ya
Chigariov Valeriy Vasilijovich
Shchetinin Sergey V
Shchetinina Vira I

popup.nrat_date

2021-07-29