The Experts below are selected from a list of 171 Experts worldwide ranked by ideXlab platform

Mitjan Kalin - One of the best experts on this subject based on the ideXlab platform.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    Abstract One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained. © 2011 Elsevier Ltd. All rights reserved.

F. Majdič - One of the best experts on this subject based on the ideXlab platform.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    Abstract One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained. © 2011 Elsevier Ltd. All rights reserved.

J. Pezdirnik - One of the best experts on this subject based on the ideXlab platform.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    Abstract One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained.

  • Experimental validation of the lifetime performance of a proportional 4/3 hydraulic Valve operating in water
    Tribology International, 2011
    Co-Authors: F. Majdič, J. Pezdirnik, Mitjan Kalin
    Abstract:

    One of the alternative hydraulic fluid is water, which is environmentally acceptable, low-cost and non-flammable. We have designed a new hydraulic test rig and a new water proportional control Valve to investigate the tribological and hydraulic behaviour of such water-based systems under pressures of up to 16 MPa and flows of up to 30 lpm. In this work, we present the lifetime performance of all-stainless-Steel Valve with distilled water being used as the hydraulic fluid. The results show that the water-based Valve can operate for more than 10 million cycles under industrial relevant conditions if the water cleanness is appropriately maintained. © 2011 Elsevier Ltd. All rights reserved.

N. Murugan - One of the best experts on this subject based on the ideXlab platform.

  • Effect of gas tungsten arc welding process variables on dilution and bead geometry of Stellite 6 hardfaced Valve seat rings
    Surface Engineering, 2020
    Co-Authors: R. Shanmugam, N. Murugan
    Abstract:

    AbstractHardfacing is one of the surfacing methods most widely employed in Valve manufacturing industries to deposit Stellite 6, a cobalt based alloy, on low carbon Steel Valve seat rings to enhance specific properties such as wear and corrosion resistance. Gas tungsten arc welding (GTAW) process is used for hardfacing smaller size Valves. The quality of the hardfaced deposits depends on the degree of dilution. The control of dilution will result in better metallurgical and mechanical properties of hardfaced deposits. Mathematical models have been developed in this paper to study the effects of GTAW process parameters on dilution and other important hardfacing parameters, namely, penetration, reinforcement and bead width. Models have been tested for their adequacy by regression methods. The direct and interaction effects are presented in graphical form which can be used not only for the prediction of geometry but also for controlling weld bead quality.

  • Prediction and Optimisation of Weld Bead Geometry of Plasma Transferred Arc Hardfaced Valve Seat Rings
    Surface Engineering, 2020
    Co-Authors: K. Marimuthu, N. Murugan
    Abstract:

    AbstractAutomatic weld hardfacing is being employed increasingly in process and power industries. Plasma transferred arc welding (PTAW) has become a natural choice for automatic hardfacing due to its reliability, better process control, ease of use, low dilution and high volume production. Increasing the use of PTAW in its automatic mode, will increase dependence on the use of equations to predict the dimensions of the weld bead. The development of such mathematical equations using a five factor, five level factorial technique to predict the geometry of the weld in the deposition of Stellite 6 (Co-Cr-A) alloy onto carbon Steel Valve seat rings (ASTM A105) is presented. The developed models have been checked for their adequacy and significance by the F test and t test respectively. Main and interaction effects of the control factors on dilution and bead geometry are presented in a graphical form that aids rapid selection of the process parameters to achieve the desired quality of overlay. The results obtai...

  • Development of Mathematical Models for Prediction of Weld Bead Geometry in Cladding Mild Steel Valve Seat Rings by PTAW
    Procedia Engineering, 2020
    Co-Authors: N. Srimath, N. Murugan
    Abstract:

    Abstract The process of metal joining for cladding is largely used in many process industries. Plasma transferred arc welding (PTAW) is accurate, and is easily available, with very low dilution and high volume of production. Computation of process equations by PTAW to predict the weld bead geometry is largely used in automatic PTAW. A five factor, five level technique used for the development of mathematical equations for the predicting the weld bead geometry for cladding SS410L (Cr-Si-Ni) onto carbon seat Valve rings (ASTM A105) and is presented. The sufficiency and significance of the developed models by F test and t test have been checked respectively. To achieve the desired quality of overlay, the main and interaction effects of the control factors on dilution and bead geometry is presented. The mathematical model and the results obtained were optimized with conformity test. The artificial neural network model was developed to optimize the amount of metal deposited with regards to dilution.

Atsushi Ehira - One of the best experts on this subject based on the ideXlab platform.

  • impact wear characteristics of engine Valve and Valve seat insert materials at high temperature impact wear tests of austenitic heat resistant Steel suh36 against fe base sintered alloy using plane specimens
    Wear, 1995
    Co-Authors: Takeo Ootani, Noboru Yahata, Akira Fujiki, Atsushi Ehira
    Abstract:

    Abstract In order to simulate the wear of the Valves and Valve seat inserts of automotive engines, impact wear tests were conducted using rings made of a JIS SUH36 Steel Valve material and disks made of a sintered alloy Valve seat insert material. Test conditions were as follows: impact energy of 0.588 J, dry air of room temperature, 200°C and 400°C, and sliding speeds of 0-0.8 m s −1 . Under these conditions, very low wear was observed for both materials subjected to impacts without sliding. Under impacts with sliding at 0.1 m s −1 , a mildly bright worn surface was observed at room temperature. At this sliding speed, the rings also showed an accelerated wear rate. At 200°C with sliding speeds over 0.4 m s −1 , a bright worn surface was observed and the wear rate was severe. However, at 400°C, oxidation occurred and no acceleration of the wear rate was observed at any sliding speed. These results can be explained by the occurrence of oxidation and the mechanical properties of the test materials.