Hardening coatings of tool materials for turning of stainless steels

2021 ◽  
pp. 7-10
Author(s):  
B.Ya. Mokritsky
Keyword(s):  
Experimental Data ◽  
Computer Simulation ◽  
Tool Wear ◽  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
Software Environment ◽  
Tool Materials ◽  
Hardening Coatings ◽  
Cutting Zone

The results of new tool materials designing for processing of stainless steels are presented, which allowed to increase the tool life up to 3 times. The studies are carried out with the integrated use of experimental data and computer simulation in the Deform software environment. The criteria by which modeling is feasible at sufficient level are identified: tool wear, temperature in the cutting zone, stresses in the tool material and tool material deformation.

scholarly journals The use of tool materials for monitoring the state of cutting technological systems

2021 ◽  
Vol 25 (1) ◽  
pp. 17-30
Author(s):  
В. Ya. Mokritskiy ◽  
V. Yu. Shelkovnikov
Keyword(s):  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
The State ◽  
Technological System ◽  
Dynamic State ◽  
Technological Systems ◽  
Software Environment ◽  
Life Period ◽  
Cutting Zone

 The aim was to develop a methodology for monitoring the dynamic state of the links “machine tool – device – cutting tool – detail” comprising a cutting technological system as applied to turning specialized stainless steels using replaceable standard hardmetal inserts. The research object was the hard-to-treat non-corrosive stainless steels 09Х17Н7Ю, 12Х18Н10Т and 13Х15Н5 АМ-3. Monitoring was carried out by simulating plate coatings in the Deform software environment. The diagnostic criterion was the tool life period up to the wear level of 0.5 mm along the rear edge. The effect of coatings on the tool life period was assessed according to the following parameters: temperature in the cutting zone, tension in the tool material and tool deformation. As a result, 10 optimal coatings having the greatest impact on the state of the cutting technological system under study were selected. These coatings can be used for diagnosing the state of cutting technological systems. The coatings were distinguished in terms of architecture (design, composition,structure and coating method). A technique for monitoring and managing the state of cutting technological systems according to the results of diagnostics was proposed. The deviation of the revealed state of the cutting technological system from the desired state was estimated by the life period of tools with different coatings for the same time of their operation. The state of the system under study was considered effective provided that the maximum tool life period due to the use of an optimal coating was achieved. A technique allowing assessment of the state of technological cutting systems by their simulation according to the parameters “temperature in the cutting zone”, “tension in the tool material” and “tool deformation” was proposed. This technique also permits monitoring of the state of cutting systems by the parameter "tool life period" and managing their state according to the results of diagnostics through the use of the most optimal plate coatings. The developed technique can be used to reveal the optimal parameters of the cutting mode of hard-to-treat specialized corrosion-resistant steels.  

Tool Materials for Turning Machine-Building Stainless Steel 09Kh17N7Yu

2021 ◽  
pp. 27-33
Author(s):  
B.Y. Mokritskiy ◽  
E.S. Sitamov
Keyword(s):  
Stainless Steel ◽  
Tool Wear ◽  
High Performance ◽  
Metal Cutting ◽  
Operating Time ◽  
Tool Material ◽  
Machine Building ◽  
Operating Conditions ◽  
Software Environment ◽  
Tool Materials

Hard-to-process specialized stainless steel grade 09Kh17N7Yu has become widely used in various fields of mechanical engineering due to its unique performance properties. The existing recommendations for its processing are outdated and do not meet modern requirements for the performance of metal-cutting tools. This necessitated the need to develop recommendations for modern high-performance machine tools. The paper presents methods of solving this problem based on the example of turning by typical domestic replaceable hard-alloyed cutting plates. Relationships between the tool wear and the operating time were obtained. Design solutions for tool materials to be used under specified operating conditions were developed. A significant outcome of the paper was the use of simulation modeling in the Deform software environment, which allowed the authors to develop new coatings for the hard alloy VK8, which provided a significant (up to 3 times) increase in tool life. Using modelling, it was also possible to design new tool materials for new or expected operating conditions. The following main criteria sufficient for modeling were identified: tool wear, temperature in the cutting zone, stresses in the tool material and deformation of the tool material. The results obtained can be used as the basis for the so-called data bank, which can be used in production enterprises.

Peculiarities of tool material wear at polymeric composite blank cutting

2018 ◽  
Vol 2018 (7) ◽  
pp. 27-31
Author(s):  
Юрий Зубарев ◽  
Yuriy Zubarev ◽  
Александр Приемышев ◽  
Alexsandr Priyomyshev
Keyword(s):  
Tool Wear ◽  
Tool Material ◽  
Polymeric Composite ◽  
Physical Models ◽  
Technological Parameters ◽  
Tool Materials ◽  
Materials Used ◽  
The Impact ◽  
Material Wear

Tool materials used for polymeric composite blank machining, kinds of tool material wear arising at machining these blanks, and also the impact of technological parameters upon tool wear are considered. The obtained results allow estimating the potentialities of physical models at polymeric composite blanks cutting.

Evaluation of Cooling Potential and Tool Life in Turning Using Metalworking Fluids Delivered in Supercritical Carbon Dioxide

2009 ◽  
Author(s):  
Andres F. Clarens ◽  
Ye-Eun Park ◽  
Jacob Temme ◽  
Kim Hayes ◽  
Fu Zhao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Tool Wear ◽  
Tool Life ◽  
Heat Removal ◽  
Minimum Quantity Lubrication ◽  
Metalworking Fluids ◽  
Compacted Graphite ◽  
Lower Viscosity ◽  
Cutting Zone ◽  
Machining Operations

Carbon Dioxide is an industrial byproduct that has been proposed as an alternative metalworking fluid (MWF) carrier with lower environmental impacts and better cooling potential than existing MWFs. This paper investigates the heat removal and tool life effects of rapidly expanding supercritical CO2 (scCO2)-based MWFs relative to MWFs delivered as a flood of semi-synthetic emulsion or as minimum quantity lubrication (MQL) sprays. When cutting both compacted graphite iron (CGI) and titanium, tool wear was most effectively controlled using the scCO2-based MWF compared with the other MWFs. Analysis in this paper suggests that the performance benefit imparted by rapidly expanding scCO2 appears to be related to both the cooling potential and penetration of the sprays into the cutting zone. High-pressure gas sprays have lower viscosity and higher velocity than conventional MWFs. An experiment in which the spray direction was varied clearly demonstrated the importance of spray penetration in tool wear suppression. The type of gas spray is also a significant factor in tool wear suppression. For instance, a spray of N2 delivered under similar conditions to CO2 effectively reduced tool wear relative to water based fluids, but not as much as CO2. This result is particularly relevant for MQL sprays which are shown to not cool nearly as effectively as scCO2 MWFs. These results inform development of scCO2-based MWFs in other machining operations, and provide insight into the optimization of scCO2 MWF delivery.

Tool Materials for Turning Specialized Stainless Steels

2021 ◽  
pp. 3-8
Author(s):  
B.Y. Mokritskiy ◽  
E.S. Sitamov
Keyword(s):  
Hard Alloy ◽  
Stainless Steels ◽  
Tool Material ◽  
Simulation Studies ◽  
Operational Parameters ◽  
Tool Materials ◽  
Coating Method ◽  
Composition Structure ◽  
Good Agreement ◽  
Tool Durability

The article considers the issues of increasing the tool durability when turning specialized hard-to-work corrosion-resistant stainless steels 09Kh17N7Yu, 12Kh18N10T and 13Kh15N5AM3 with standard replaceable carbide tip. To develop recommendations for reducing tool consumption, a number of experimental and simulation studies was performed. The simulation was performed in the Deform software for three parameters: temperature, stress, and strain. The simulation results are compared with the operational parameters (wear of the tool material). Simulation was performed for ten different coatings on a hard-alloy substrate of the VK8 brand. The tool hard alloy VK8 is used as the base tool material, the other tool materials differ in the architecture (design, composition, structure and coating method) of the coatings applied to the VK8 substrate. The techniques of selecting the most rational tool materials are developed. The results obtained by simulation are verified experimentally. A good agreement between the results of simulation and experimental research has been achieved.

Study of the Tool Life and the Tool Wear Mechanisms in the Production of Holes in Stainless Steel

2013 ◽  
Vol 459 ◽  
pp. 424-427 ◽  
Author(s):  
Jozef Jurko ◽  
Anton Panda
Keyword(s):  
Stainless Steel ◽  
Tool Wear ◽  
Tool Life ◽  
Stainless Steels ◽  
Feed Rate ◽  
Wear Mechanisms ◽  
Theory And Practice ◽  
Tool Wear Mechanisms ◽  
Cutting Speeds

The content of this article also focuses on the analysis of the tool life of screw drills. This paper presents the conclusions of tests on a stainless steel DIN 1.4301.The results of the article are conclusions for working theory and practice for drilling of stainless steels. Based on the cutting tests, cutting speeds of 30 to 60 m/min, feed rate of 0.04to0.1 mm and screw drill carbide monolite.

scholarly journals Influence of machining conditions on friction in metal cutting process – A review

Mechanik ◽  
2019 ◽  
Vol 92 (4) ◽  
pp. 242-248
Author(s):  
Wit Grzesik ◽  
Joel Rech
Keyword(s):  
Tool Wear ◽  
Contact Zone ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Sliding Velocity ◽  
Contact Conditions ◽  
Tool Materials ◽  
Cutting Zone ◽  
Cooling Media ◽  
Cutting Tool Materials

This paper presents a range of variable machining factors which influence substantially friction directly or by the tool wear developed in the cutting zone. The group of direct factors include the workpiece and cutting tool materials coupled, the cutting/sliding velocity, cooling media supplied to the tool-chip contact zone, modification of the tool contact faces by micro-texturing. Special attention was paid to the tool wear evolution and its pronounced effect on changes of the contact conditions.

On effect of tool materials coating on surface roughness treated during turning of stainle

2021 ◽  
pp. 77-81
Author(s):  
B.Ya. Mokritsky ◽  
S.N. Guletsky
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Stainless Steels ◽  
Technological System ◽  
Tool Materials ◽  
Hardening Coatings

The requirements for the surface quality of parts are steadily growing, including for parts made from stainless steels, the scope of which is rapidly expanding. Surface roughness is largely the result of a large number of processes occurring in the cutting technological system. For most cases, the roughness is regulated by the parameters Ra and Rz. This paper describes the dependence of the surface roughness of parts on the hardening coatings applied to the carbide replaceable plates of turning cutters, presents the results of the corresponding studies of the surface roughness by a large number of parameters as applied to the turning of specialized stainless steels.

Helical Drills Wear during Drilling of a New ELC Austenitic Stainless Steels

2012 ◽  
Vol 217-219 ◽  
pp. 2202-2205 ◽  
Author(s):  
Jozef Jurko ◽  
Anton Panda ◽  
Marcel Behún ◽  
Andrej Berdis ◽  
Ján Gecák ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Tool Wear ◽  
Stainless Steels ◽  
Cutting Speed ◽  
Austenitic Stainless Steels ◽  
Depth Of Cut ◽  
Low Carbon ◽  
Tool Wear Mechanisms ◽  
Cutting Zone

This article presents the results of experiments that concerned on the tool wear and tool wear mechanisms by drilling of a new Extra Low Carbon (ELC) austenitic stainless steel X02Cr16Ni10MoTiN. This article presents conclusions of machinability tests on new austenitic stainless steels X02Cr16Ni10MoTiN. The results of cutting zone evaluation under cutting conditions (cutting speed in interval vc=30-50 m/min, depth of cut ap=4.0 mm and feed f=0.02-0.08 mm per rev.).

Tool Wear Investigations on Some Cutting Tool Materials

1980 ◽  
Vol 102 (4) ◽  
pp. 556-559 ◽  
Author(s):  
V. C. Venkatesh
Keyword(s):  
Tool Wear ◽  
Titanium Carbide ◽  
Tool Life ◽  
Diffusion Layer ◽  
Cutting Tool ◽  
Tungsten Carbides ◽  
Crater Wear ◽  
Tool Materials ◽  
Titanium Carbides ◽  
Cutting Tool Materials

Tool life curves were plotted for HSS, cemented tungsten carbides, coated carbides, and cemented titanium carbides. HSS tools showed a distinct inflection coinciding with the formation of a white diffusion layer. Crater wear propagation studies were carried out on all tools and in addition on laminated carbides. HSS, laminated carbide, and cemented titanium carbide show a tendency to form a closed crater, revealing that in these tools diffusion is a mode of wear.

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