Changing of structure and mechanical properties of P6M5 steel for nitriding and carbonitriding in electrolyte plasma

Skakov, Маzhyn; Rakhadilov, Bauyrzhan; Sheffler, Michael

doi:10.1109/ifost.2012.6357727

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…The measurement results, Figure 7, indicate that after electrolytic plasma hardening, the microhardness more than doubled: on average, from HV 231 to HV 640 kgf/mm2. When converting the hardness, the average value of the hardness of the hardened surface of the tip by the method of electrolytic plasma hardening corresponds to 54-60 HRC, which significantly exceeds the hardness of 255-260 HB of steel in the as-delivered condition [25].…”

Section: Fig 5 Cyclic Electrolytic-plasma Hardeningmentioning

confidence: 99%

Improving wear resistance by electrolyte-plasma hardening of corrosion-resistant steel of the tip

et al. 2023

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The development of new fields in the oil and gas industry of Kazakhstan, the exploitation of fields with hard-to-recover reserves, and the exclusion of harmful environmental impacts require the study of new advanced technologies in the manufacture of valves. Hardening of the throttle tip in the factory from low-carbon corrosion steel is provided traditionally: carburizing in a solid carburetor, followed by hardening and normalization in an electric furnace. However, this process is accompanied by high heat losses, long time spent on heating and cooling the furnace to the required temperature, and high-energy consumption - power costs are 60-100 kW/h. The carbon penetration rate is low, and for depths of 1-1.5 mm, it becomes necessary to heat the workpiece in a carburetor for 8-10 hours at a certain temperature, followed by hardening and normalization. The technological process of traditional hardening by cementation, followed by hardening and normalization, is accompanied by the appearance of various defects. The most common defects include the formation of microcracks, warpage, scale, and peeling of the metal, as well as high labor intensity and energy intensity. A technology has been developed for hardening the tip on an electrolytic-plasma modification installation, which includes heating the part to 910-9600C and quenching in an electrolyte flow at 330-3600C, characterized in that the part is heated by electrolyte plasma, the temperature of which exceeds 6000 K. Analytically and experimentally it was determined that heating with electrolyte plasma for quenching is achieved within 4 seconds and quenching in the electrolyte flow is achieved within 8 seconds. With cyclic electrolytic plasma hardening at the 10th cycle with 40 seconds of total processing, optimal hardening rates are achieved. An electron microscopic study of the hardened structure indicates a phase transformation and the formation of hardening martensite with a carbide network, which strengthens the steel. The tribological properties and friction coefficient of the surface layers formed during electrolytic-plasma hardening indicate an increase in the wear intensity by more than two times.

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Section: Fig 5 Cyclic Electrolytic-plasma Hardeningmentioning

confidence: 99%

Improving wear resistance by electrolyte-plasma hardening of corrosion-resistant steel of the tip

et al. 2023

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“…[9] Achieving optimum surface properties with high energy density, minimal energy, and time consumption of electrolytic plasma treatments (EPT) is extremely important from an economic and environmental point of view. [12][13][14][15][16] Today, methods such as Taguchi, [17][18][19][20] response surface method (RSM), [21,22] and artificial neural network (ANN) [23] are used for optimization and estimation in coating and tribology.This study investigates the microstructural evolution of Ti-6Al-4V under EPT thermal as a pioneer study. Moreover, a methodology of surface hardening Ti-6Al-4V alloy with graded microstructure and performance was conducted by applying the EPT thermal cycles.…”

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Taguchi Optimization of Electrolytic Plasma Hardening Process Parameters on Ti‐6Al‐4V Alloy: Microstructure and Mechanical Properties

Ayday,

Özsoy,

Yener

2023

Adv Eng Mater

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In this study it is investigated the effects of electrolytic plasma treatment (EPT) on the hardness distribution, wear resistance and surface morphologies of titanium alloy (Ti‐6Al‐4V) at three different thermal cycles (4‐5‐6 times). The microstructure was controlled by heat temperature and modification times of thermal cycles depending on EPT processing parameters. A novel technique to modify Ti‐6Al‐4V alloy by the process of EPT successfully occurred. The results showed that the phase transformation was shown as follows: fine α and β for the low thermal cycle → irregular martensite α’ for the high thermal cycle → complete zigzag martensite α’ for the max thermal cycle. The hardness was increased from 350±10HV0.05 to 530±10HV0.05 after the modification. Wear tests were conducted according to Taguchi L9 (3^3) orthogonal array. Three parameters (load, sliding speed, sample type) with three levels examined wear rate and coefficient of friction. Optimum levels were obtained by Taguchi analysis from the experimental results. In addition, analysis of variance (ANOVA) was performed to find the effectiveness of the parameters. The wear surfaces were analyzed by scanning electron microscope. After the analysis, the best result was obtained in 5 thermal cycle.This article is protected by copyright. All rights reserved.

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Effects of Electrolyte Plasma Carbonitriding on Tribological Properties of High Speed Steel

Skakov

Rakhadilov

Sсheffler

2013

AMR

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This paper presents research of influence electrolyte plasma carbonitriding on tribological properties of R6M5 high-speed steel. Shows perspectiveness of carbonitriding high-speed steels in electrolyte plasma. The results of research demonstrated increasing wear-resistance of R6M5 steel after carbonitriding in electrolyte plasma. Under the same test conditions by the method of scratch-test have been determined that the depth of the scar of a modified layer has become less in comparison with the original sample, which indicates a significant increase of wear-resistance and hardness of the surface carbonitriding layer R6М5 steel. It was set that after electrolytic-plasma carbonitriding abrasive wear-resistance of the surface layers of R6M5 steel is increased by 25%. Introduction

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Changing of structure and mechanical properties of P6M5 steel for nitriding and carbonitriding in electrolyte plasma

Cited by 3 publications

References 2 publications

Improving wear resistance by electrolyte-plasma hardening of corrosion-resistant steel of the tip

Improving wear resistance by electrolyte-plasma hardening of corrosion-resistant steel of the tip

Taguchi Optimization of Electrolytic Plasma Hardening Process Parameters on Ti‐6Al‐4V Alloy: Microstructure and Mechanical Properties

Effects of Electrolyte Plasma Carbonitriding on Tribological Properties of High Speed Steel

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