Effect produced by corrosive environment on fatigue resistance of automotive structural steel

Пачурин, Г. В.; Filippov, A. A.; Goncharova, D. A.; Nuzhdina, T. V.; Matveyev, Yu.I.; Mukhina, M. V.; Kutepova, Lyubov I.

doi:10.1088/1757-899x/632/1/012037

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…The most important task in the production development is the improvement of quality of the initial metal products and parts made therefrom, increase of their performance, reliability, durability, as well as bringing of these indicators to the world levels in order to ensure the products competitiveness at the world market [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Resource-saving preparation of the 38KHGNM steel surface for heading of automobile components

et al. 2020

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To produce high-quality fasteners for motor group components of automobiles it is necessary to follow the increased requirements to calibrated rolled stock in terms of surface defects. Therefore, the goal of this paper is to study the reasons, types and depth of the surface defects on the calibrated rolled stock from steel 38KHGNM Ø 12.0 mm on the basis of the metallographic analysis. Before cold upsetting, the hot-rolled products are subjected to metal flow and removal of unacceptable surface defects by means of expensive turning operation during which the screw cuts and cracks might appear. It has been defined, that the hot-rolled stock from steel, grade 38KHGNM, diameter 12.0 мм has nonuniform mechanical properties, grooves, laps and partial decarburization on the surface. The heat treatment of the rolled stock with a decarburized layer on the surface contributes to its further decarburization. Poor alignment of calibrated stock during its turning at the turning machine does not enable to completely remove the decarburized layer with minimum skinning of rolled stock. It has been shown that the use of rolled stock from steel 38KHGNM with surface defects and unreasonably high decarburized layer on the surface increases its rejection by 8% and raises the consumption of rolled stock for manufacturing of important fasteners for the motor group of automobiles.

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Section: Introductionmentioning

confidence: 99%

Resource-saving preparation of the 38KHGNM steel surface for heading of automobile components

et al. 2020

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“…Operating performance of the structural materials intended for manufacturing of the machine building hardware items is formed at all stages of metallurgical treatment: from selection of furnace charge used for metal smelting to the final item production [3][4][5]. Another reason to increase the service life and operating reliability is the high cost of the automotive structural materials.…”

Section: Introductionmentioning

confidence: 99%

Fatigue of the automobile structural materials in corrosive environment

et al. 2020

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Operation of machines and equipment is accompanied by an impact produced by various types of loads leading to fatigue rupture of the structural materials. The most harmful are the vibration loads which in a corrosive environment increase the potential for a failure resulting in human casualties. Therefore, the task of ensuring the operating capability of machine elements and assemblies is one of the outstanding tasks for all industry sectors. In addition, the need for extending the service life and increasing the operational reliability is also determined by a relatively high cost of the machine structural materials and hardware items. Therefore, the execution of the experimental studies of the structural material fatigue features with a view to reduce the metal consumption, to establish new processing methods as well as to select a competitive material, are of the priority for the up-to-date machine building sector. The purpose of this article is to determine any fatigue behavior regularities in automotive materials which were pre-processed according to various technology types and modes and which were operating in a corrosive environment. The experimental data analysis has demonstrated that the longer the cyclic metal materials testing is run, the more sufficient is the decrease of the fatigue resistance of these.

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Factors affecting the tribotechnical properties of sintered materials

Cherney

Skachkova

Permovskiy

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The article considers the issues of production of powder antifriction materials based on iron by methods of pressing and rolling powder mixtures. The analysis of influence of composition of materials, technological conditions of their production and other factors on the structure, mechanical and tribotechnical properties of powder sliding bearings was carried out. During the operation of the machine, its elements, subjected to various influences, change in state, size and properties. The effectiveness of developments in the field of tribotechnical materials is determined by the properties of these materials, as well as the speed and breadth of their industrial use. The effect of porosity of samples on their tribotechnical properties and hardness after sintering and additional heat treatment is studied. The results of tribotechnical tests of iron-copper-graphite sintered sulfided compositions, not alloyed and doped with phosphorus, as well as materials including additional lubricant components: graphite, molybdenum disulfide or calcium fluoride, are presented. On the basis of tests, it was found that in conditions of liquid friction, alloying with phosphorus has a decisive effect on increasing wear resistance, and without supplying lubricant to sintered samples with impregnated oil, wear is more than an order of magnitude higher compared to the conditions of liquid friction.

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Effect produced by corrosive environment on fatigue resistance of automotive structural steel

Cited by 3 publications

References 10 publications

Resource-saving preparation of the 38KHGNM steel surface for heading of automobile components

Resource-saving preparation of the 38KHGNM steel surface for heading of automobile components

Fatigue of the automobile structural materials in corrosive environment

Factors affecting the tribotechnical properties of sintered materials

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