Case hardening ≈ Case hardening
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Prediction of Surface Treatment Effects on the Tribological Performance of Tool Steels Using Artificial Neural Networks Open
The present paper discussed the development of a reliable and robust artificial neural network (ANN) capable of predicting the tribological performance of three highly alloyed tool steel grades. Experimental results were obtained by perfor…
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Hardening effect and fatigue behavior enhancement through ball burnishing on AISI 1038 Open
The objective of this paper is to present a comprehensive study of the effects of ball burnishing on the low cycle fatigue endurance of cylindrical specimens subjected to alternative bending stress, by constructing fatigue S-N curves to ev…
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Surface treatment of tool steels against galling failure Open
In the present study two highly alloyed steel grades, intended for cold working applications, were subjected to plane-contact, nonlubricating sliding friction testing in order to estimate the working regions (applied pressure and sliding v…
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Optimization of the Laser Hardening Process by Adapting the Intensity Distribution to Generate a Top-hat Temperature Distribution Using Freeform Optics Open
Laser hardening is a surface hardening process which enables high quality results due to the controllability of the energy input. The hardened area is determined by the heat distribution caused by the intensity profile of the laser beam. H…
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Temperature Modeling of AISI 1045 Steel during Surface Hardening Processes Open
A Coupled thermo-mechanical finite element model was employed to simulate the possible effects of varying laser scanning parameters on the surface hardening process for AISI 1045 and AISI 4140 steels. We took advantage of the high-power de…
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New method for strengthening surfaces of heat treated steel parts Open
There is described a method for strengthening surfaces of heat-treated steel parts, which includes technological procedures of carburizing by electroerosive alloying process (CEEA) and also nitriding processes. The nitriding process is sim…
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Fatigue limit of induction hardened railway axles Open
A new surface induction hardening technology was designed for the purpose of increasing the resistance of railway wheelsets to fatigue damage. This paper gives a detailed presentation of the technological aspects of induction hardening of …
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Modeling of the case depth and surface hardness of steel during ion nitriding Open
Modeling of the ion nitriding process allows solving many problems of operations management, forecasting of results and development of new treatment regimes, which is an urgent issue today. The goal of the paper was modeling of the case de…
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Effects of Laser Hardening Process Parameters on Hardness Profile of 4340 Steel Spline—An Experimental Approach Open
This study displays the effect of laser surface hardening parameters on the hardness profile (case depth) of a splined shaft made of AISI 4340 steel. The approach is mainly based on experimental tests wherein the hardness profile of laser …
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Application of plasma surface quenching to reduce rail side wear Open
Hardening of the side surface of the rail head with the use of optical and electron microscopy is studied. Results of industrial tests are given. Plasma hardening of the side surface of the rail allows one to obtain a favorable structure o…
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The features of steel surface hardening with high energy heating by high frequency currents and shower cooling Open
The paper examines the process of surface hardening of steel 45 with the help of high energy heating by high frequency currents with simultaneous shower water cooling. We theoretically justified and experimentally proved a possibility of l…
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Evaluation of contact fatigue risk of a carburized gear considering gradients of mechanical properties Open
Carburized gears are widely used in geared machines such as wind turbines. Contact fatigue problems occur in engineering practice, reducing reliabilities of machines. Contact fatigue failures are related to many factors, such as gradients …
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Hardening of Surface Layers of Cu–39Zn–1Pb Brass at Holding and High-Frequency Impact Deformation in Liquid Nitrogen Open
Експериментально досліджено зміни мікротвердості HV поверхневих шарів двофазної латуні ЛС59-1 в залежності від тривалості витримки в середовищі рідкого азоту та кріогенної ультразвукової ударної обробки (УЗУО) за квазі-ізостатичних умов.По…
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Micro-pitting and wear characterization for different rolling bearing steels: Effect of hardness and heat treatments Open
The current trend of increased power density and reduction of oil viscosity in machine components is forcing engineers and scientists to engineer surfaces to endure higher contact pressures and stresses induced from rolling/sliding motion.…
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Carburization-induced microstructure evolution and hardening mechanism of 18CrNiMo7-6 steel Open
The microstructural evolution and hardening mechanism caused by carburizing heat treatment must be determined to improve the in-service functional performance of components used in advanced equipment for aerospace and other industrial appl…
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Effects of Laser Hardening Process Parameters on Case Depth of 4340 Steel Cylindrical Specimen—A Statistical Analysis Open
Laser heat treatment is considered to be one of best-performing manufacturing processes used currently due to its flexibility and its ability to develop parts with complex geometries. In fact, this process is able to produce reliable parts…
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Gear micropitting initiation of ground and superfinished gears: Wrought versus pressed and sintered steel Open
This paper investigates the resistance of micropitting on two materials, using an FZG back-to-back test rig with C-PT gears. The materials are wrought steel (16MnCr5) and a commercial powder metallurgical material (Astaloy™ Mo). Two finish…
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Fatigue‐based model for the droplet impingement erosion incubation period of metallic surfaces Open
Droplet impingement of metallic surfaces at high impact velocities results, after some time, in erosion of the surface due to fatigue. By extending our previously published analytical model to enable the use of experimental fatigue data (S…
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Formation of Surface Ultrafine Grain Structure and Their Physical and Mechanical Characteristics Using Vibration‐Centrifugal Hardening Open
The vibration‐centrifugal hardening forms a gradient ultrafine grain structure of the ferritic class with a grain size of 190 nm and a surface microhardness of 8.9 GPa and a depth of up to 6 mm on the surface of 40 Kh steel of the ferritic…
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Surface hardening of structural steel by cathode spot of welding arc Open
The structure, phase composition, and morphology of the surface layers of structural 1020, 1050, 1060 steels of the steel modified by the cathode spot of the welding arc are studied with the help of electron and optical microscopy. It is s…
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Surface hardening of cutting elements agricultural machinery vibro arc plasma Open
At present, the state technical policy aimed at the modernization of worn equipment, including agriculture, based on the use of high-performance technology called nanotechnology. By upgrading worn-out equipment meant restoring it with the …
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Stress Analysis to Improve Pitting Resistance in Gear Teeth Open
Helical gears are subjected to contact fatigue loads, which may result in the damage of the gear teeth, for example by pitting-type failure. Microstructural features, mechanical properties and residual stresses have strong influence on the…
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Thermochemical post-processing of additively manufactured austenitic stainless steel Open
The effects of different thermochemical post-processing treatments on the microstructure and properties of additively manufactured austenitic stainless steel were investigated. If the nitrogen content in the as-built condition is high, aus…
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DEVELOPMENT OF AIR-PLASMA TECHNOLOGY FOR HARDENING CUTTING TOOLS BY APPLYING WEAR-RESISTANT COATINGS Open
The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of geology and technical sciences in the Emer…
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Steel Case Hardening Using Deformational Cutting Open
This paper describes some fundamental principles, specific features, and the technological capabilities of a new method of quenching steel surface by turning without separation of chips. The underlying process of this method is a deformati…
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Method of case hardening depth testing by using multifunctional ultrasonic testing instrument Open
The paper describes usability of ultrasonic case hardening depth control applying standard instrument of ultrasonic inspections. The ultrasonic method of measuring the depth of the hardened layer is proposed. Experimental series within the…
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Method of Electrolyte-Plasma Surface Hardening of 65G and 20GL Low-Alloy Steels Samples Open
This work is devoted to formation of modified surface layers in 65G and 20GL steels which using for the manufacture of railway transport parts, as well as the study of influence of the parametersof electrolyte-plasma surface hardening meth…
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Microcracks Reduction in Laser Hardened Layers of Ductile Iron Open
A study of surface hardening of Ductile Iron (DI) with and without austempering heat treatment was developed. The chemical composition of the material contains alloying elements such as Cu and Ni, that allow to obtain a Ductile Iron Grade …
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Laser Surface Hardening of Ni-hard White Cast Iron Open
Laser surface treatment on two different types of nickel–chromium white cast iron (Ni-hard) alloys (Ni-hard 1 and Ni-hard 4) was investigated. Nd:YAG laser of 2.2-kw with continuous wave was used. Ni-hard alloys are promising engineering m…
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A Review of Common Beam Hardening Correction Methods for Industrial X-ray Computed Tomography Open
X-ray computed tomography (XCT) became an important instrument for quality assurance in industry products as a non-destructive testing tool for inspection, evaluation, analysis and dimensional metrology.Thus, a high-quality image is requir…