Influence of Soil Type on Breaking of Low-Alloy Steels during Wear

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2023-03-13 DOI:10.3103/S1068366622060046

V. I. Dvoruk, K. V. Borak, I. A. Buchko, N. A. Kirienko

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Abstract—

The results of studying the regularities of destruction and their influence on the wear resistance of low-alloy 65G and 28MnB5 steels when moving in different types of soil are presented. It has been established that the effect of soil type on destruction and wear resistance ε is controlled by rheological-fatigue parameter R_f, which plays a leading role in the strength base of the wear mechanism of low-alloy steels. In the process of wear, residual tensile stresses of a plastic-destructive nature are formed on the working surface of the steel, the lowest value of which is observed after testing in sandy loam, and the highest in light clay. Consequently, the relaxation of stresses by the mechanisms of plastic deformation and destruction in sandy loam is more intense than in average loam and light clay. The following correlation has been established: the higher the level of residual stresses, the higher the rheological-fatigue parameter and wear resistance of steel. In the studied soil types, the leading role is played by stress relaxation mechanisms in the area of low-cycle fatigue. Therefore, the mechanical component of interaction with the soil is dominant in the formation of the structural-phase state of the surface layers of steels. The damage of low-alloy steels in soil is mixed and includes three main forms of abrasive wear: mechanical, mechanical fatigue, mechanochemical. In all studied soil types, the mechanical fatigue form of abrasive wear plays a leading role. Therefore, an increase in the wear resistance of low-alloy steels must first of all be associated with the elimination of active low-cycle fatigue phenomena on the wear surface. The formation of secondary structures during wear in the soil contributes to a decrease in the absorption of irreversible energy by the metal, and, consequently, to an increase in its wear resistance.

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土壤类型对低合金钢磨损断裂的影响

摘要:本文研究了低合金65G和28MnB5钢在不同类型土壤中移动时的破坏规律及其对耐磨性的影响。研究表明，土壤类型对破坏和耐磨性ε的影响受流变疲劳参数Rf控制，在低合金钢磨损机理的强度基础中起主导作用。在磨损过程中，钢的工作表面形成了塑性破坏性质的残余拉应力，砂壤土中残余拉应力最小，轻粘土中残余拉应力最大。因此，砂壤土的塑性变形和破坏机制对应力的松弛作用比普通壤土和轻质粘土更强烈。建立了以下相关性:残余应力水平越高，钢的流变疲劳参数和耐磨性越高。在研究的土壤类型中，应力松弛机制在低周疲劳区起主导作用。因此，与土壤相互作用的力学分量在钢表层结构相态的形成中占主导地位。低合金钢在土壤中的损伤是混合性的，主要有三种磨损形式:机械磨损、机械疲劳磨损和机械化学磨损。在所有研究的土壤类型中，磨粒磨损的机械疲劳形式起主导作用。因此，要提高低合金钢的耐磨性，首先必须消除磨损表面的主动低周疲劳现象。在磨损过程中，土壤中二级结构的形成有助于减少金属对不可逆能量的吸收，从而提高其耐磨性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.