Results 111 to 120 of about 489 (145)
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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
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The Advantages of Low Pressure Carburizing Over Conventional Carburizing Process
Springer Proceedings in Materialsexaly +2 more sources
Study of tantalum hemicarbide (Ta2C) production by low pressure carburizing
, 2015 Tantalum is a very dense metal (d = 16.6) and has a very high melting temperature of 2996°C. This material is particularly required for crucibles used for pyrochemical applications. Early studies show that a carburizing treatment enhances corrosion resistance from liquid metals.
Cotton, Dominique
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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
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Modeling Gas and Low Pressure Carburizing of Steel
Heat Treating Conference, 2013Abstract Industrial carburizing parameter optimization traditionally relies on time-consuming and expensive trial-and-error methods, yielding suboptimal results. To address this challenge, the Center for Heat Treating Excellence developed CarbTool, a sophisticated simulation program designed to calculate carbon concentration profiles ...
Xiaolan Wang +5 more
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Low-pressure hollow cathode plasma source carburizing technique at low temperature
Surface and Coatings Technology, 2021Abstract A low-pressure hollow cathode plasma source carburizing was developed as a novel surface treatment technique based on the active screen plasma carburizing combined with hollow cathode sources. The cylindric cathodic cage with array holes was made of pure graphite, where the hollow cathode graphite tubes were inlaid on.
H.Y. Liu, H.L. Che, G.B. Li, M.K. Lei
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Microstructure, microhardness and impact toughness of low pressure carburized PM steels
, 2011 The effect of low pressure carburizing (LPC) on two low alloyed sintered steels processed according to differentroutes to obtain different amounts of open porosity was studied. In presence of an open porosity,overcarburizing promotes the precipitation of grain boundary carbides in the Cr steel, and the formation ofretained austenite in the Cr free one.
E. Santuliana +3 more
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Low-Pressure Carburizing of Powder Metal Components
Heat Treating Conference, 2017Abstract Transmission-manufacturers constantly need to adapt their products and manufacturing technologies to meet future’s market and legislation requirements such as cost-efficiency, running-smoothness and drivetrain-agility. Components made of powder metal (“PM-components”) are established in today’s transmission industry as a cost ...
Volker Heuer +5 more
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Copper Evaporation During Low Pressure Carburizing
Heat Treating Conference, 2017Abstract Low pressure carburizing (LPC) in a vacuum furnace is increasingly the preferred method of case hardening for aerospace gears, and acetylene is often one of the gases used in the process. Selective case hardening is common with gears, where certain sections of a part are “stopped off” or “masked” to prevent carburization at ...
Trevor Jones +2 more
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Low Pressure Carburizing in a Vacuum Furnace
Heat Treating Conference, 2015Abstract Historically, this carburizing has been performed in an endothermic gas consisting of CO2, CH4, CO, etc, but carburizing in low pressure with the proper gas mixture changes the landscape. Using C2 H2, the process is no longer endothermic as C2H2 is a catalytically decomposable hydrocarbon and dissociates in the presence of an ...
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