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the effect of cooling rate on microstructure and mechanical properties of gs20mn5 steel used for manufacturing of cast bogie
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نویسنده
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hasanpour mohammad ,owhadi amin ,boutorabi seyed mohammad ali
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منبع
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international journal of railway research - 2019 - دوره : 6 - شماره : 2 - صفحه:73 -82
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چکیده
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The gs20mn5 steel is a low carbon manganese steel used for cast freight bogies manufacturing. the impact toughness of such steels for freight bogie solebars must be at least 17j/cm2 at 60 °c according to gost32400 standard. in the present work, the effect of cooling rate after the austenitizing at two temperatures on the structure and mechanical properties of gs20mn5 steel is investigated, including toughness at 60 °c. the cooling rate varies from 1 to 5.4 °c/sec. the optimum toughness and strength are observed after two hour austenitizing at 930 °c and quenching rate of 2.8 °c/sec where the impact energy mean values reached 32j/cm2 at 60 °c.
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کلیدواژه
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heat treatment ,mechanical properties ,cast bogie ,gs20mn5 steel ,low temperature
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آدرس
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iran university of science and technology, school of metallurgy and materials engineering, iran, iran university of science and technology, school of railway engineering, iran, iran university of science and technology, school of metallurgy and materials engineering, iran
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Authors
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