Influence of the Method of Strengthening the Surface of Parts on Acoustic Characteristics

Elena Levashova,Nikolai Ababkov,Maksim Pimonov,S Vöth,N Van Hoan,S Popek,F.I Panteleenko,R Vavrek,N.C Cuong

doi:10.1051/matecconf/201929705010

Elena Levashova, Nikolai Ababkov + Show 7 more

Open Access

https://doi.org/10.1051/matecconf/201929705010

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Abstract

The article is devoted to the consideration of the method of increasing the mechanical and tribological properties of parts of mining machines due to quenching and electric arc hardening of the restored surface layer by welding. The essence of the proposed method was to restore the geometric dimensions of the part with cored wire with guaranteed hardness of 50-55 HRC and an increase in values up to 60 HRC due to electric arc hardening (EAH), which uses equipment available at each mining enterprise, namely, a tungsten-electrode torch cooled water and protective gas. Argon, which has a relatively low ionization potential, was used as a protective gas, and the use of carbon dioxide was not considered, owing to the increased tendency to crack formation of layers strengthened in this way. The results of studies of the acoustic characteristics of the restored part of the rotation of the welding, made of steel 30HGSA in the initial state of surfacing after electric arc hardening, after quenching and the combined combination of hardening and electric arc hardening are shown.

Highlights

As you know, the main methods for improving mechanical properties and creating a certain structure of restored parts of mining equipment is heat treatment
This article is devoted to the consideration of the method of increasing the mechanical and tribological properties of parts of mining machines due to quenching and electric arc hardening of the restored surface layer by welding
The essence of the proposed method is to restore the geometric dimensions of the part powder wire with a guaranteed hardness of 50-55 HRC and an increase in values up to 60 HRC due to electric arc hardening (EAH), in which equipment is used that is available at each mining enterprise, namely a water-cooled tungsten electrode torch and protective gas

Summary

Introduction

The main methods for improving mechanical properties and creating a certain structure of restored parts of mining equipment is heat treatment. The most common methods are laser treatment, electrospark doping and surface hardening.

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Results

Conclusion