The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform

K Dybowski - One of the best experts on this subject based on the ideXlab platform.

  • properties of surface layers processed by a new high temperature vacuum Carburizing technology with prenitriding prenitlpc
    Advanced Materials Research, 2012
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski, Sylwester Paweta, Emilia Wolowiec
    Abstract:

    The variety of vacuum Carburizing with prenitriding (PreNitLPC® technology) consists in metering ammonia in the stage of charge heating for Carburizing to reduce grain growth in the surface layer of carburized steel. This paper presents the effect of nitrogen interaction on the reduction of austenite grain growth during vacuum Carburizing and on the mechanical properties (fatigue strength, impact resistance) of the layer treated in this way in relation to conventional Carburizing methods.

  • vacuum Carburizing process optimization
    Journal of Materials Processing Technology, 2005
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski
    Abstract:

    Abstract An increased interest in vacuum Carburizing concept is being observed in the last years all around the world as a result of the progress in designing of modern furnaces for thermo-chemical treatment under low pressure and of better knowledge of physico-chemistry of these processes. This in turn allows a precise control with aid of computer simulations. The vacuum Carburizing simulation programs allow selection of optimal process parameters to obtain pre-determined carbon concentration profile in surface layer at a time as short as possible. These objectives are being achieved as a result of better knowledge about surface phenomena occurring during vacuum Carburizing process.

Piotr Kula - One of the best experts on this subject based on the ideXlab platform.

  • properties of surface layers processed by a new high temperature vacuum Carburizing technology with prenitriding prenitlpc
    Advanced Materials Research, 2012
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski, Sylwester Paweta, Emilia Wolowiec
    Abstract:

    The variety of vacuum Carburizing with prenitriding (PreNitLPC® technology) consists in metering ammonia in the stage of charge heating for Carburizing to reduce grain growth in the surface layer of carburized steel. This paper presents the effect of nitrogen interaction on the reduction of austenite grain growth during vacuum Carburizing and on the mechanical properties (fatigue strength, impact resistance) of the layer treated in this way in relation to conventional Carburizing methods.

  • vacuum Carburizing process optimization
    Journal of Materials Processing Technology, 2005
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski
    Abstract:

    Abstract An increased interest in vacuum Carburizing concept is being observed in the last years all around the world as a result of the progress in designing of modern furnaces for thermo-chemical treatment under low pressure and of better knowledge of physico-chemistry of these processes. This in turn allows a precise control with aid of computer simulations. The vacuum Carburizing simulation programs allow selection of optimal process parameters to obtain pre-determined carbon concentration profile in surface layer at a time as short as possible. These objectives are being achieved as a result of better knowledge about surface phenomena occurring during vacuum Carburizing process.

M. Yu. Semenov - One of the best experts on this subject based on the ideXlab platform.

Richard D. Sisson - One of the best experts on this subject based on the ideXlab platform.

  • Carburizing Heat Treatment of Selective-Laser-Melted 20MnCr5 Steel
    Journal of Materials Engineering and Performance, 2020
    Co-Authors: Mei Yang, Richard D. Sisson
    Abstract:

    As a novel manufacturing technology, additive manufacturing (AM) has many advantages such as energy saving, reduced material waste, faster design-to-build time, design optimization, reduction in manufacturing steps, and product customization compared to conventional manufacturing processes. Heat treatment is widely used to improve the properties of conventional manufactured steel parts. The response of additively manufactured steel parts to heat treatment may be different from conventionally manufactured steel parts due to variations in the as-deposited alloy microstructure. An understanding of heat treatment processes for additively manufactured steel parts is necessary to develop their heat treatment process parameters. In the present work, 20MnCr5 steel was selected to investigate the Carburizing heat treatment of additively manufactured parts. These parts were fabricated by selective laser melting (SLM) for the Carburizing study. It was found that the AM parts fabricated by the SLM process show the microstructure of tempered martensite, while the microstructure of as-received wrought part is ferrite and pearlite. It was also experimentally found that the SLM process decarburizes the entire SLM part. Before Carburizing, a normalization process was conducted on both SLM and wrought 20MnCr5 parts to reduce the effect of the pre-Carburizing microstructure. The objective of this project is to determine the Carburizing performance of additively manufactured steel parts. The results for the SLM parts in terms of carbon concentration and microhardness profiles are compared with the results for the wrought steel. It was found that the carburized SLM part in the present work has higher carbon concentration near the surface, deeper case depth, and higher total carbon flux than the carburized wrought part.

  • Development of Nitrogen-Hydrocarbon Atmospheric Carburizing and Process Control Methods
    Journal of Materials Engineering and Performance, 2013
    Co-Authors: Xiaolan Wang, Zbigniew Zurecki, Richard D. Sisson
    Abstract:

    Atmospheric pressure Carburizing and neutral carbon potential annealing in nitrogen containing small additions of hydrocarbon gases can offer cost and steel surface quality alternatives to the comparable, endothermic atmosphere, or vacuum operations. An experimental program was conducted for refining real-time process control methods in Carburizing of AISI 8620 steel under N_2-CH_4, N_2-C_3H_8 blends containing

Robert Pietrasik - One of the best experts on this subject based on the ideXlab platform.

  • properties of surface layers processed by a new high temperature vacuum Carburizing technology with prenitriding prenitlpc
    Advanced Materials Research, 2012
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski, Sylwester Paweta, Emilia Wolowiec
    Abstract:

    The variety of vacuum Carburizing with prenitriding (PreNitLPC® technology) consists in metering ammonia in the stage of charge heating for Carburizing to reduce grain growth in the surface layer of carburized steel. This paper presents the effect of nitrogen interaction on the reduction of austenite grain growth during vacuum Carburizing and on the mechanical properties (fatigue strength, impact resistance) of the layer treated in this way in relation to conventional Carburizing methods.

  • vacuum Carburizing process optimization
    Journal of Materials Processing Technology, 2005
    Co-Authors: Piotr Kula, Robert Pietrasik, K Dybowski
    Abstract:

    Abstract An increased interest in vacuum Carburizing concept is being observed in the last years all around the world as a result of the progress in designing of modern furnaces for thermo-chemical treatment under low pressure and of better knowledge of physico-chemistry of these processes. This in turn allows a precise control with aid of computer simulations. The vacuum Carburizing simulation programs allow selection of optimal process parameters to obtain pre-determined carbon concentration profile in surface layer at a time as short as possible. These objectives are being achieved as a result of better knowledge about surface phenomena occurring during vacuum Carburizing process.