Results 71 to 80 of about 445 (113)
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Carburization of high-temperature steels: A simulation-based ranking of carburization resistance
Engineering Failure Analysis, 2015Abstract Carburization is a failure mechanism affecting equipment, such as furnace tubes, operating at high temperatures. Carburization simulations were carried out for the heat-resistant steels referred to the API-530 standard by applying a model for carbon diffusion with the concurrent formation of alloy carbides.
G.F. Samaras, G.N. Haidemenopoulos
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Mechanism of carburization of high-temperature alloys
Journal of Materials Science, 1992An investigation of the mechanism of gaseous carburization in a reducing environment was conducted for selected Fe- and Ni-base alloys. Carburization kinetics were measured as functions of temperature in the range 870–980 °C. Scanning electron microscopy, analytical electron microscopy and X-ray diffractometry were employed for microstructural ...
H. M. Tawancy, N. M. Abbas
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Surface modification of austenitic steels by low‐temperature carburization
Surface and Interface Analysis, 2012Austenitic stainless steels are characterized by good corrosion resistance in different environments, but their use is limited because of low hardness and poor wear resistance. Conventional thermochemical surface treatments for improving the mechanical strength of steels induce Cr carbide precipitation and thus are detrimental to ...
Ciancaglioni, I +6 more
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Low-temperature creep of a carburized steel
Metallurgical Transactions A, 1992The low-temperature creep behavior of carburized 4320 steel with retained austenite contents of 35 and 14 pct and two uncarburized 4320 steels was investigated. The temperature range in the experiments was from 70 °C to 195 °C. The creep rate obeyed a logarithmic law when the stress level was below or near the proportional limit.
R. W. Neu, Huseyin Sehitoglu
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Reaction Kinetics and Catalysis Letters, 2006
The promotion effect of potassium has been studied with the method of Temperature Programmed Surface Carburization (TPSC) technique and H2-TPR. The process of carburization on the catalyst surface was enhanced by addition of potassium was added, so that the probability for the generated alkenes species to be further hydrogenated was increased.
Chong Wang +3 more
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The promotion effect of potassium has been studied with the method of Temperature Programmed Surface Carburization (TPSC) technique and H2-TPR. The process of carburization on the catalyst surface was enhanced by addition of potassium was added, so that the probability for the generated alkenes species to be further hydrogenated was increased.
Chong Wang +3 more
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Carburization of high temperature PM-materials
Materials and Corrosion, 1998Carburization of powder metallurgically processed materials for high temperature use is interesting for several reasons: Production of carbide powders e.g. for hard metals, formation of carbide layers on bulk materials to improve corrosion and/or wear resistance and degradation of material properties like strength and ductility by metal-carbon ...
H.-P. Martinz +3 more
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SSRN Electronic Journal, 2018
The study of process parameters in metals during heat treatment has been of considerable interest for some years but there has been relatively little work on process variables during the surface hardening process since controlling parameters in carburization is a complex problem.
EQUATORIAL JOURNALS +2 more
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The study of process parameters in metals during heat treatment has been of considerable interest for some years but there has been relatively little work on process variables during the surface hardening process since controlling parameters in carburization is a complex problem.
EQUATORIAL JOURNALS +2 more
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Applied Mechanics and Materials, 2014
In this study, in order to explore a suitable method to obtain a better wear resistance and corrosion resistance of austenitic stainless steel, low temperature plasma carburizing technology has been studied. Research on the properties of austenitic stainless steel under different carburizing atmosphere proportion, with hardness, wear resistance and ...
Xing Sheng Tong, Ting Zhang, Wei Ye
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In this study, in order to explore a suitable method to obtain a better wear resistance and corrosion resistance of austenitic stainless steel, low temperature plasma carburizing technology has been studied. Research on the properties of austenitic stainless steel under different carburizing atmosphere proportion, with hardness, wear resistance and ...
Xing Sheng Tong, Ting Zhang, Wei Ye
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Metal Science and Heat Treatment, 2020
The properties of steel parts after carburizing in low-pressure acetylene are studied. The thickness of the carburized layer, its hardness, the microstructure, and the hardness of the core are determined after carburizing at 900 – 960°C with simultaneous shortening of the process from 104 to 44 min. The data obtained for the diffusion of carbon make it
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The properties of steel parts after carburizing in low-pressure acetylene are studied. The thickness of the carburized layer, its hardness, the microstructure, and the hardness of the core are determined after carburizing at 900 – 960°C with simultaneous shortening of the process from 104 to 44 min. The data obtained for the diffusion of carbon make it
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Metal Science and Heat Treatment of Metals, 1959
1. An increase in the carburizing temperature of steel using high frequency heating and solid carburizer, increased the productivity by a factor of 3–4 at 1000° C and by 5–8 at 1150° C compared with ordinary heating. 2. Successful high-temperature carburizing in a solid carburizer depended basically on prevention of local carbon pick-up ...
S. F. Yur'ev, S. K. Ginzburg
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1. An increase in the carburizing temperature of steel using high frequency heating and solid carburizer, increased the productivity by a factor of 3–4 at 1000° C and by 5–8 at 1150° C compared with ordinary heating. 2. Successful high-temperature carburizing in a solid carburizer depended basically on prevention of local carbon pick-up ...
S. F. Yur'ev, S. K. Ginzburg
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