scholarly journals Modeling of quality characteristics of the surface layer hardened by free-moving indenters under rotating electromagnetic field

2016 ◽  
Vol 16 (3) ◽  
pp. 71-78
Author(s):  
Valery A. Lebedev ◽  
Anatoly A. Kochubey ◽  
Irina V. Chumak
Keyword(s):  
Electromagnetic Field ◽  
Surface Layer ◽  
Functional Model ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Quality Parameters ◽  
Surface Plastic ◽  
Dynamic Methods ◽  
Dynamic Processing ◽  
Surface Layer Quality

It is shown that the magnetodynamic treatment implemented under the conditions of a rotating electromagnetic field is a kind of the dynamic methods of hardening free-moving indenters by the convection flows. It is proposed to use analytic dependences obtained by the approximation of the test data of effect of the surface plastic deformation (SPD) dynamic methods on the component hardened layer quality to evaluate quality parameters of the surface layer formed under the magnetodynamic processing. The resulting expression describing the experimentally established fact that the main contribution to the formation of the quality parameters of the hardened layer is made by the initial continuous coating of the treated surface with plastic prints is obtained. An analytical functional model establishing the surface layer quality parameters behavior depending on the multiplicity of covering the surface by the shock-pulse impact of the free-moving indenters is proposed. A comparative analysis of the experimental data obtained in the process of the magneto-dynamic processing with the calculated ones shows the applicability of the proposed models for predicting quality parameters of the hardened surface layer.

scholarly journals Finish-strengthening treatment with surface-plastic deformation

2021 ◽  
Vol 2021 (4) ◽  
pp. 3-9
Author(s):  
Roman Gurov ◽  
Andrey Shcherbakov
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Quality Criteria ◽  
Surface Plastic Deformation ◽  
Quality Parameters ◽  
Geometrical Parameters ◽  
Surface Plastic ◽  
Processing Modes ◽  
Definition Of ◽  
Surface Layer Quality

There are offered dependences for the definition of parameters formed for surface layer quality when finishing and finish-strengthening with surface-plastic deformation, for the definition of processing modes, tool geometrical parameters taking into account initial parameters of surface layer quality. Criteria for the choice of the processing method ensuring quality parameters required for a surface layer and surface operation properties are offered.

Acoustic and Emission Control of the Hereditable Stress and Strain State of the Metal Surface Layer during Cutting and Surface Plastic Deformation

2015 ◽  
Vol 788 ◽  
pp. 3-10
Author(s):  
Valeriy Yu. Blumenstein ◽  
Fyodor I. Panteleenko ◽  
Igor V. Miroshin ◽  
Oleg A. Ostanin
Keyword(s):  
Plastic Deformation ◽  
Acoustic Emission ◽  
Surface Layer ◽  
Shear Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Deformation Degree ◽  
Emission Signal ◽  
Experimental Findings ◽  
Surface Layer Quality

Methods and experimental findings shown describe how mechanical parameters of the surface layer behavior and acoustic emission signals are interconnected.Experimental study was carried out under conditions of simple single-and dual stage compression. Graphic and analytic dependencies between the counting rate of the acoustic emission Ṅ and the shear deformation degree Λ were revealed. The findings describing dual compression show that the acoustic emission method is sensitive to the material stressing history.The dependency of the acoustic emission signal energy on the pre-stressing program was found, which helped establish that, with values of the plasticity reserve depletion being equal for all experimental specimens, the accumulated shear deformation degree Λ was different.The findings describing the hereditable physical state of the strengthened surface layer of parts during cutting and surface plastic deformation are presented in the paper. The study was carried out using the methods of property accumulation control in deformation sites depending on treatment modes with real-time monitoring of acoustic emission signals. A peculiar feature of these methods is the use of visual recording of the metal plastic flow to be further used in calculating the hereditable parameters of the surface layer quality.

scholarly journals HETEROGENEOUS HARDENING OF MACHINES PARTS BY SURFACE PLASTIC DEFORMATION

2019 ◽  
pp. 106-112
Author(s):  
А. Афонин ◽  
A. Afonin ◽  
Е. Мартынов ◽  
E. Martynov ◽  
А.В. Макаров ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Fatigue Loading ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Heterogeneous Structure ◽  
The Finite Element Method ◽  
Operational Characteristics ◽  
Machine Parts

The main causes of failure of heavily loaded threads are considered. The methods of increasing the efficiency of the equipment due to the method used are proposed. It is found that improving the operational characteristics of the components of mining and metallurgical machinery can be achieved forming heterogeneous-hardened surface layer. Methods of forming heterogeneous structure by surface plastic deformation (SPD are considered). The importance of identifying the nature of the influence of parameters of heterogeneous hardened layer on the performance of machine parts is indicated. Modeling of process heterogeneous hardening of SPD of the finite element method is executed. Recommendations about application of heterogeneous hardening of SPD for hardening the heavy-duty parts are offered. It is found that the use of different methods SPD allows widely vary the degree of depth and the uniformity of the hardening of machine parts. It is found that this increase in life responsible highly loaded parts operating under fatigue loading due to hardening of the heterogeneous surface layer may reach 1.5 times or more.

scholarly journals Engineering support for specified quality of parts surface layer under dynamic methods processing of surface plastic deformation

2016 ◽  
Vol 16 (3) ◽  
pp. 46-52 ◽  
Author(s):  
Mihail- Tamarkin- ◽  
Aleksandra- Shvedova-- ◽  
-Roman- Grebenkin ◽  
Sergey Novokreshchenov-
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Dynamic Methods

Reliability control of technological processes of parts processing by dynamic methods of surface plastic deformation

2020 ◽  
pp. 419-423
Author(s):  
M.A. Tamarkin ◽  
E.E. Tishchenko ◽  
T.S. Sosnitskaya ◽  
S.A. Novokreshchenov
Keyword(s):  
Plastic Deformation ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Parameters ◽  
Degree Of Deformation ◽  
Technological Processes ◽  
Dynamic Methods ◽  
Reliability Control ◽  
Deformation Treatment

The results of parts processing processes by dynamic methods of surface plastic deformation taking into account their reliability are presented. Dependencies are identified to determine surface roughness, depth of the hardened layer and degree of deformation for various dynamic methods of surface plastic deformation treatment. Processing time is defined. Studies of the considered technological processes reliability by technological parameters are carried out. Technological recommendations on design of technological processes and application of research results are given.

Study of Surface Layer Hardening after Treatment Complex Tool

2020 ◽  
Vol 303 ◽  
pp. 89-96
Author(s):  
K.S. Mitrofanova
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Strain State ◽  
Experimental Studies ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Inheritance ◽  
Multiple Loading ◽  
Surface Layer Hardening ◽  
Solidified Body

The results of experimental studies of the thin surface layer of samples made of steel 45 after treatment with surface plastic deformation (SPD) multiradius roller (MR-roller) are presented. On the basis of the apparatus of the mechanics of technological inheritance, taking into account the effect of the solidified body, a model of the process according to the scheme of multiple loading-unloading of metal, taking into account the phenomenology of the SPD process and the properties of the material, is created. Distributions of parameters of the stress-strain state in the deformation centre are obtained, the parameters of roughness and microhardness of the surface layer are investigated.

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