FLAKES AND HYDROGEN CONTENT IN U71Mn HEAVY RAIL STEEL

Acta Metall Sin

1992, Vol. 28

Issue (10): 25-28 DOI:

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FLAKES AND HYDROGEN CONTENT IN U71Mn HEAVY RAIL STEEL

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LI Peiji; XIAN Aiping; WANG Yikang (Institute of Metal Research; Academia Sinica; Shenyang); CHEN Renyi; MEI Dongsheng(Panzhihua Institute of Iron and Steel Re search; Ministry of Metallurgical Industry). FLAKES AND HYDROGEN CONTENT IN U71Mn HEAVY RAIL STEEL. Acta Metall Sin, 1992, 28(10): 25-28.

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Abstract The content of hydrogen allowed in U71Mn heavy rail steel, produced by the Panzhihua Iron and Steel Company, was investigated by technique of hydrogen blowing into molten steel. Experimental results revealed that the critical hydrogen content is limited to 2.5 ppm. If the content in melt increases to 3.3—5.8 ppm, the flakes may form in the steel. And it will further drop as the increase of Mn contained. It was also observed that the incubation period for flake forming seems to be undetermined.

Key words: heavy rail steel hydrogen in steel flake

Received: 18 October 1992

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1992/V28/I10/25

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