EFFECTS OF TITANIUM CARBIDES FORMATION ON INTERNAL HEAT OF WELDING BATH
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2018, Vol 82, Issue
Abstract
Problem. At present, precious alloy with alloying elements, which are scarce and expensive in Ukraine, are used to increase the durability of the die tool. In this regard, studies aimed at reducing energy and resource costs while restoring a metal-working tool, enhancing its reliability and durabil-ity, are particularly relevant. The goal is to investi-gate the distribution of the TiC carbide phase in the Cr–Mn–Mo–Ti wear–resistant alloy compounds. Methodologically, the work was carried out in the following way: on the basis of literary sources and industrial research the conditions of the work of dies for hot metal processing were studied. An analysis of existing alloys and their application technol-ogies showed that they all have both advantages and disadvantages. On the basis of this, economical-ly wear-resistant alloys of the Cr–Mn–Mo–Ti system on the basis of iron with a limited content of chro-mium (up to 3 %) and molybdenum (up to 5%) were developed, as well as the technology of their appli-cation with an exhausted additive which is fed to the main part of the welding baths. Results. Application of surfacing with powdered wires with exoge-nous introduction of carbides into a weld bath promotes a more even distribution of the carbide phase in the volume of metal compared with the endoge-nous carbide entrance. In this case, increasing the content of Mn and Cr in the welded metal reduces the activity of carbon as a carbide–forming element. An increase in the carbide phase of TiC increases the internal heat of the weld metal when it is exoge-nously introduced. Practical significance. Ware-houses of wear-resistant coatings with limited con-tent of scarce alloying elements have been devel-oped as well as the technology of application. The use of developed wear- resistant alloys and technol-ogies for their application allowed to reduce the concentration of alloying elements, the complexity of the thermal treatment of recovered stamps, the relative weight of flux and the share of electricity consumption, to improve the basic technological parameters of surfacing.
Authors and Affiliations
V. Bagrov
Keywords
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- EP ID EP477849
- DOI 10.30977/BUL.2219-5548.2018.82.0.81
- Views 78
- Downloads 0
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