SELECTION OF MATERIAL FOR RESPONSIBLE DETAILS SCRAPER CONVEYOR
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2018, Vol 82, Issue
Abstract
Problem. We have studied the properties of steels BRK, 18ChGT, 20ChGNB used for the manufacture of sidewalls of chute conveyor pans after various treatment regimes in order to select the most appropriate one. The working conditions stipulate high demands to chute conveyor pan material with respect to strength and durability, and the term of chute conveyor pan service is determined by the sidewall stability. The level of properties, micro-structure of sidewalls after heat treatment and weld-ing are analyzed. As between the hardness and wear resistance there is a direct relationship, the research methodology consisted in measuring the hardness, strength indicators, and study of the microstructure. It was revealed that after the heat treatment and welding of pan sidewalls made of steel BRK there is not provided the desired level of strength (the tensile strength must not be lower than 1275 MPa), and there is observed unevenness in the distribution of hardness and strength properties over the cross sec-tion. This can be avoided using alloy steels. It was established that оf the two studied steels 18HGT and 20HGNR, a higher complex of properties is provided by steel 20HGNR, during quenching of which in a soft cooling medium – oil – a high level of proper-ties is fixed. When welding the sidewalls of pans made of steel 20ChGNB with other parts of pans, subject to wear the softening of the areas subject to wear do not exceed 2–3 HRC. Based on the above studies it should be noted that steel 20ChGNB can be recommended for the manufacture of sidewalls of pans.
Authors and Affiliations
D. B. Нlushkova, L. L. Kostina, E. M. Voronova, S. V. Demchenko, A. A. Chigrin
Keywords
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- EP ID EP477832
- DOI 10.30977/BUL.2219-5548.2018.82.0.74
- Views 94
- Downloads 0
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