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- W2356110339 abstract "In order to solve the problem of poor stability of low temperature impact toughness in 50 mm thickness high strength low alloy steel Q550D,the industrial tests were carried out to adjust the alloy compositions.The results show that the strength of steel plates is stable and the elongation is good,the longitudinal impact values at-20 ℃ are stabilized between 239-324 J in quarter thickness and in particular,the first qualification rate of impact toughness of the steels with new compositions can reach 100%,and the microstructure of finished product is improved obviously,and also the cost of unit steel drops much.The industrial tests also show that the elements of precipitation strengthening and solution strengthening in high strength low alloy steel should be added properly according to the smelting condition of molten steel and rolling technology.At the same time,the larger debate on the influence of hardenability on lower temperature impact instability of this steel has been clarified by means of jominy tests,and the tests show that the hardenability of original compositions is superior to that new compositions,that is to say,the poor stability of low temperature impact values of steel plates with original compositions is not due to its poor hardenability,but to its unreasonable compositional desigin is." @default.
- W2356110339 created "2016-06-24" @default.
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- W2356110339 date "2012-01-01" @default.
- W2356110339 modified "2023-09-24" @default.
- W2356110339 title "Composition Optimization of 50 mm-Thickness High Strength Low Alloy Steel Q550D" @default.
- W2356110339 hasPublicationYear "2012" @default.
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