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About Increasing Wear Resistance of Rock-Breaking Tool to Abrasion by Using Mechanical and Thermo-Mechanical Treatment

Victor Bolobov(1), Stanislav Chupin(2*), Vladimir Bochkov(3)

(1) Saint Petersburg Mining University, Russian Federation
(2) Saint Petersburg Mining University, Russian Federation
(3) Saint Petersburg Mining University, Russian Federation
(*) Corresponding author


DOI: https://doi.org/10.15866/ireme.v11i5.11581

Abstract


The experimental studies results of the mechanical and thermo-mechanical treatment influence of wear resistance of excavator bucket tooth materials and rotary cutting tool are presented in this article. Experiments on abrasion in different rocks were investigated. In the example of 110G13L steel (Hadfield steel), it was shown that mechanical strengthening (cold hardening) is an effective way to improve wear resistance of machine parts working in abrasive environments. It was revealed that if the hardness of abrasive materials is lower than the hardness of cold hardening steel, wear resistance may increase by 10 times and if the hardness of abrasive materials is higher than the hardness of steel with cold hardening, it does not influence wear resistance. It was found that the high-temperature thermo-mechanical treatment of 30KhGSA steel increases its hardness (by 23%) and wear resistance (by 38%) by comparing with the same steel after hardening. It was concluded that the advisable use one of these methods depends on rock hardness.
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Keywords


Material of Rock-Breaking Tool; Cold Hardening; Thermo-Mechanical Treatment; Rocks; Wear Resistance; Wear Rate

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