Results 171 to 180 of about 439 (213)
Some of the next articles are maybe not open access.
Characterization of carburized 14Cr14Co13Mo4 stainless steel by low pressure carburizing
Surface and Coatings Technology, 2019Abstract The case-hardened 14Cr14Co13Mo4 martensitic stainless steel is carburized by low-pressure carburizing method. Plenty of second phase particles appear in the case layer. C concentration is measured by Carbon and Sulphur analyzer. Precipitation of second phase induces the improvement of C concentration in case layer.
Guangze Tang +2 more
exaly +2 more sources
The kinetics of low-pressure carburizing of alloy steels
Vacuum, 2011Abstract In the article the author analyzed the kinetics of low-pressure carburizing of alloy steels, based on steel 16MnCr5 and CSB 50NIL. It was found that an active radical-carbon layer (carbon deposit) deposits on the surface of austenite grains or austenite and carbides during boost steps. This layer mediates in moving the carbon deeper into the
exaly +2 more sources
Optimizing the low-pressure carburizing process of 16Cr3NiWMoVNbE gear steel
Journal of Materials Science and Technology, 2019Abstract Compared with the traditional atmospheric carburization, low-pressure carburization has the benefits of producing no surface oxidation and leaving fine, uniformly dispersed carbides in the carburized layer. However, the process parameters for low-pressure carburization of 16Cr3NiWMoVNbE steel have yet to be optimized.
Yong Tian
exaly +2 more sources
Structure of the carbon layer deposited on the steel surface after low pressure carburizing
Vacuum, 2010Abstract During low pressure carburizing a carbon layer precipitates on the surface of steel parts. The structure of the carbon layer was tested by means of optical and electron microscopy and Raman spectroscopy as well. It was found out that the carbon layer is composed of fine-crystalline graphite.
Andrzej Łapiński
exaly +2 more sources
Dynamic optimization of low-pressure carburizing furnaces
2021 23rd International Conference on Process Control (PC), 2021This paper presents the modelling and dynamic optimization of low pressure carburizing of steel. A cyclic hybrid model alternating two modes, i.e. the two stages of the process, boost and diffusion stages, is proposed. Each mode is characterized by a set of ordinary differential equations and its corresponding transition conditions and transition ...
Matamoros Marin, Fatima +4 more
openaire +2 more sources
The Advantages of Low Pressure Carburizing Over Conventional Carburizing Process
Springer Proceedings in Materialsexaly +2 more sources
Modelling and Simulation of Low Pressure Carburizing Furnaces
2020In this paper, modelling of a low pressure carburizing furnace is developed. Acetylene is chosen as the reactive gas and its pyrolysis, described by a detailed kinetic mechanism is studied in a perfectly stirred tank reactor. Special attention is paid to the fluid-solid interactions; adsorption is described using a Langmuir approach and a first order ...
Matamoros, Fatima +4 more
openaire +1 more source
Copper Evaporation During Low Pressure Carburization
AM&P Technical Articles, 2018Abstract Stringent pressure control and gas species type both play an important role in minimizing the evaporation rate of not only copper, but other elements susceptible to evaporation in vacuum systems. The article describes a study investigating the effect of temperature, pressure, and carrier gas species on the amount of copper ...
Trevor Jones +2 more
openaire +1 more source