Verification of Chips Creating as an Indicator of Machinability in Turning of a New Steel X2cr12ni12motin

2012 ◽  
Vol 500 ◽  
pp. 9-13
Author(s):  
Mário Gajdoš ◽  
Andrej Berdis ◽  
Ján Gecák ◽  
Milan Mičko ◽  
Tadeaš Kurilovský
Keyword(s):  
Stainless Steels ◽  
Feed Rate ◽  
Austenitic Stainless Steels ◽  
Theory And Practice ◽  
Machining Process ◽  
Solid Carbide ◽  
Cutting Zone ◽  
Carbide Insert ◽  
Cutting Speeds

Precise and reliable information on the machinability of a material before it enters the machining process is a necessity, and hypotheses must be tested through verification of actual methods. This article presents conclusions of machinability tests on a new austenitic stainless steels X2Cr12Ni12MoTiN and describes appropriate parameters for the cutting zone during the process of turning. The content of this article also focuses on the analysis of selected basic indicators of steel machinability: quality of the processed surface. The results of the article are conclusions for working theory and practice for turning of austenitic stainless steels. Based on the cutting tests, cutting speeds of 80 to 200 m/min, feed rate of 0.05 to 0.2 mm and solid carbide insert WNMG 080404-NF.

Analysis of Cutting Zone Machinability during the Drilling of XCr18Ni8 Stainless Steel

2012 ◽  
Vol 224 ◽  
pp. 142-145
Author(s):  
Jozef Jurko ◽  
Anton Panda ◽  
Marcel Behún
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Feed Rate ◽  
Austenitic Stainless Steels ◽  
Theory And Practice ◽  
Cutting Zone ◽  
Cutting Speeds

This paper presents the conclusions of machinability tests on a XCr18Ni8 stainless steel. The content of this article also focuses on the analysis of selected basic indicators of steel machinability: quality of the processed surface. The results of the article are conclusions for working theory and practice for drillng of austenitic stainless steels. Based on the cutting tests, cutting speeds of 40 to 60 m/min, feed rate of 0.04 to 1.2 mm and screw drill carbide monolite.

Verification of Surface Finish as an Indicator of Machinability in Turning Steel X6Cr16Ni10MoTiN

2011 ◽  
Vol 291-294 ◽  
pp. 2987-2990 ◽  
Author(s):  
Jozef Jurko
Keyword(s):  
Stainless Steels ◽  
Food Processing ◽  
Austenitic Stainless Steels ◽  
Theory And Practice ◽  
Food Processing Industry ◽  
Solid Carbide ◽  
Cutting Zone ◽  
Indexable Insert ◽  
Cutting Speeds

This paper presents the conclusions of machinability tests on a new austenitic stainless steel X6Cr16Ni10MoTiN, which applicated in food processing industry, and describes important concurrent parameters for the cutting zone during the process of turning. The content of this article also focuses on the analysis of selected basic indicators of steel machinability: quality of the processed surface. The results of the article are conclusions for working theory and practice for turning of austenitic stainless steels. Based on the cutting tests, cutting speeds of 60 to 220 m/min, feed rate of 0.06 to 1.2 mm and solid carbide indexable insert CNMG 160404-MF.

Analysis of the Cutting Zone Machinability during the Drilling of Cast Iron GTW 35-04

2013 ◽  
Vol 420 ◽  
pp. 246-249
Author(s):  
Jozef Jurko ◽  
Andrej Berdis ◽  
Ján Gecák ◽  
Janka Nemcová
Keyword(s):  
Cast Iron ◽  
Feed Rate ◽  
Theory And Practice ◽  
Cutting Zone ◽  
Iron Based ◽  
Cutting Speeds

This paper presents the conclusions of machinability tests on a Cast Iron GTW 35-04. The content of this article also focuses on the analysis of selected basic indicators of steel machinability: quality of the processed surface. The results of the article are conclusions for working theory and practice for drillng of cast iron. Based on the cutting tests, cutting speeds of 50 to 100 m/min, feed rate of 0.1 to 1.0 mm and screw drill carbide monolite.

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.

Evaluation of the Tool Wear the Screw Drill during the Drilling of Stainless Steels DIN 1.4301

2014 ◽  
Vol 692 ◽  
pp. 406-410
Author(s):  
Jozef Jurko ◽  
Anton Panda
Keyword(s):  
Tool Wear ◽  
Stainless Steels ◽  
Feed Rate ◽  
Cutting Tool ◽  
Theory And Practice ◽  
Cutting Tool Wear ◽  
Cutting Speeds

This paper presents the conclusions of the cutting tool wear during the drilling of steel DIN 1.4301. Based on the cutting tests, cutting speeds of 40 to 100 m/min, feed rate of 0.05 to 0.5 mm and screw drill carbide monolite. The results of the article are conclusions for working theory and practice for drilling of steel DIN 1.4301.

Evaluation of the Surface Roughnes the Machined Surface of Holes during the Drilling of Stainless Steels DIN 1.4301

2014 ◽  
Vol 692 ◽  
pp. 401-405
Author(s):  
Jozef Jurko ◽  
Anton Panda
Keyword(s):  
Stainless Steels ◽  
Feed Rate ◽  
Theory And Practice ◽  
Machined Surface ◽  
Surface Precision ◽  
Cutting Speeds

This paper presents conclusions the machined surface precision of holes for steel DIN 1.4301. Based on the cutting tests, cutting speeds of 40 to 100 m/min, feed rate of 0.05 to 0.5 mm and screw drill carbide monolite. The results of the article are conclusions for working theory and practice for drilling of steel DIN 1.4301.

scholarly journals Analysis of Forces in Vibro-Impact and Hot Vibro-Impact Turning of Advanced Alloys

2011 ◽  
Vol 70 ◽  
pp. 315-320 ◽  
Author(s):  
Riaz Muhammad ◽  
Agostino Maurotto ◽  
Anish Roy ◽  
Vadim V. Silberschmidt
Keyword(s):  
Finite Element ◽  
Cutting Forces ◽  
Three Dimensional ◽  
Element Model ◽  
Machining Process ◽  
Strain Rates ◽  
Machining Processes ◽  
Machined Surface ◽  
Cutting Zone

Analysis of the cutting process in machining of advanced alloys, which are typically difficult-to-machine materials, is a challenge that needs to be addressed. In a machining operation, cutting forces causes severe deformations in the proximity of the cutting edge, producing high stresses, strain, strain-rates and temperatures in the workpiece that ultimately affect the quality of the machined surface. In the present work, cutting forces generated in a vibro-impact and hot vibro-impact machining process of Ti-based alloy, using an in-house Ultrasonically Assisted Turning (UAT) setup, are studied. A three-dimensional, thermo-mechanically coupled, finite element model was developed to study the thermal and mechanical processes in the cutting zone for the various machining processes. Several advantages of ultrasonically assisted turning and hot ultrasonically assisted turning are demonstrated when compared to conventional turning.

scholarly journals Influence of Elastomer Layers in the Quality of Aluminum Parts on Finishing Operations

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 289 ◽  
Author(s):  
Antonio Rubio-Mateos ◽  
Asuncion Rivero ◽  
Eneko Ukar ◽  
Aitzol Lamikiz
Keyword(s):  
Process Parameters ◽  
Feed Rate ◽  
Cutting Speed ◽  
Milling Process ◽  
Machining Process ◽  
Butadiene Rubber ◽  
Compression Tests ◽  
Compressive Behavior ◽  
Finishing Processes

In finishing processes, the quality of aluminum parts is mostly influenced by static and dynamic phenomena. Different solutions have been studied toward a stable milling process attainment. However, the improvements obtained with the tuning of process parameters are limited by the system stiffness and external dampers devices interfere with the machining process. To deal with this challenge, this work analyzes the suitability of elastomer layers as passive damping elements directly located under the part to be machined. Thus, exploiting the sealing properties of nitrile butadiene rubber (NBR), a suitable flexible vacuum fixture is developed, enabling a proper implementation in the manufacturing process. Two different compounds are characterized under axial compression and under finishing operations. The compression tests present the effect of the feed rate and the strain accumulative effect in the fixture compressive behavior. Despite the higher strain variability of the softer rubber, different milling process parameters, such as the tool feed rate, can lead to a similar compressive behavior of the fixture regardless the elastomer hardness. On the other hand, the characterization of these flexible fixtures is completed over AA2024 floor milling of rigid parts and compared with the use of a rigid part clamping. These results show that, as the cutting speed and the feed rate increases, due to the strain evolution of the rubber, the part quality obtained tend to equalize between the flexible and the rigid clamping of the workpiece. Due to the versatility of the NBR for clamping different part geometries without new fixture redesigns, this leads to a competitive advantage of these flexible solutions against the classic rigid vacuum fixtures. Finally, a model to predict the grooving forces with a bull-nose end mill regardless of the stiffness of the part support is proposed and validated for the working range.

Effect of Rare Earth Elements on Machining Characteristics of Austenitic Stainless Steels without Lead Addition

2013 ◽  
Vol 377 ◽  
pp. 128-132
Author(s):  
Zhuang Li ◽  
Di Wu ◽  
Wei Lv ◽  
Shao Pu Kang ◽  
Zhen Zheng
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Large Numbers ◽  
Machining Characteristics ◽  
Lead Addition ◽  
Cutting Speeds ◽  
Better Than

Rare earth elements (REE) are harmless for human health. REE addition contributes to the improvement of the machinability of the steels. In the present paper, machining characteristics of austenitic stainless steels without lead addition were investigated by adding free-machining elements, such as sulfur, REE and bismuth. The results have shown that large numbers of rounded, globular shaped inclusions were obtained for both steels. The machinability of steel B is better than that of steel A, and the cutting forces of steel B are lower than those of steel A at various cutting speeds. Lead can be substituted by REE and bismuth in free machinable austenitic stainless steels. REE significantly affects machining characteristics of austenitic stainless steels without lead addition. The mechanical properties of both steels were similar, and their fracture exhibited ductile characteristics. Satisfactory machinability and mechanical properties can be obtained for both steels.

Research on Increasing the Nitrogen Removal Efficiency by Changing the Secondary Treatment Parameters

2014 ◽  
Vol 216 ◽  
pp. 267-272 ◽  
Author(s):  
Erika Ardelean ◽  
Marius Ardelean ◽  
Teodor Hepuț ◽  
Florin Drăgoi
Keyword(s):  
Removal Efficiency ◽  
Stainless Steels ◽  
Liquid Steel ◽  
Austenitic Stainless Steels ◽  
Inert Gases ◽  
Secondary Treatment ◽  
Refining Slag ◽  
Main Method ◽  
Flow Pressure

The existence of gases in the solid metals (hydrogen and nitrogen) assumes the presence of these gases in metals even before solidification, respectively in the elaboration, secondary treatment and casting phases. Usually, great amounts of gases dissolved in steels can be detected, between 3.5-8ppm for hydrogen and 0.02-0.03% for nitrogen, respectively. There are also cases when the purpose is to alloy with nitrogen, this being the case of austenitic stainless steels where the nitrogen content can reach 0.5% using ferrochromium or ferromanganese alloyed with nitrogen in 3-5.5 %. The main method of removing these gases is bubbling with inert gases and /or treating the steel in a vacuum facility. The paper presents a study regarding increasing the removal efficiency of nitrogen from the liquid steel by changing the bubbling parameters (flow, pressure, duration) but also the basicity of the refining slag. The equations of the regression surface and the identified fields are of a real help for the technologists, allowing quick decisions but they are also important for the quality of the metallic products [.

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