STUDY OF THE INFLUENCE OF CONTROLLED ELECTRODE METAL TRANSFER DURING ELECTRIC ARC SURFACING ON THE CONTACT FATIGUE OF THE DEPOSITED LAYER

Elena Lavrova, Vitaliy Ivanov
2020 НАУКОВЕ ЗАБЕЗПЕЧЕННЯ ТЕХНОЛОГІЧНОГО ПРОГРЕСУ XXI СТОРІЧЧЯ ТОМ 2   unpublished
The deposited working layer of the rolling rolls of hot and cold rolling mills, crane wheels, guides and other equipment units should have high values of not only wear resistance, but also contact fatigue resistance. The main ways to increase the resistance of weld-up equipment nodes in this case are the development of new compositions of surfacing materials, as well as the improvement of restoration technology. Despite a large number of studies in these areas, the operational stability of the
more » ... l stability of the deposited working layer requires a search for ways to further improve. The use of controlled transfer of electrode metal during electric arc surfacing allows one to increase the melting coefficient of the electrode, reduce the participation of the base metal in the deposited, and also stabilize the depth of the penetration zone for both wire [1] and strip electrodes [2, 3]. However, according to the literature, studies on the effect of controlled transfer parameters on the resistance of the deposited layer to contact fatigue have not been previously conducted. The need to reduce the cost of manufacturing products requires the development of technology to use the methods of testing the properties of the deposited layer on the samples when simulating the operating conditions of the deposited products. A known method of testing materials for contact fatigue according to the scheme of a three-contact roller machine [4] with the location of the contact rollers at an angle of 120º relative to each other. Tests are conducted on cylindrical specimens with a diameter of up to 200 mm in an oil bath. This test
doi:10.36074/01.05.2020.v2.04 fatcat:qxezrsrf7zhdhpzr6vrnexkwvu