Medium-carbon boron-containing steel and controlled rolling and controlled cooling method for on-line normalizing treatment

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United States of America

PATENT NO 12234537
APP PUB NO 20240240294A1
SERIAL NO

18560168

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Abstract

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The present invention provides a medium-carbon boron-containing steel. The chemical components of the medium-carbon boron-containing steel are as follows in mass percentage: 0.37-0.45% of C; 0.17-0.37% of Si; 0.60-0.90% of Mn; 0.020-0.060% of Al; 0.0008-0.0035% of B; 0.030-0.060% of Ti; P≤0.025%; S≤0.025%; Cr≤0.25%; Ni≤0.20%; Mo≤0.10%; Cu≤0.20%; and the remainder is Fe and inevitable impurities. The controlled rolling and controlled cooling method suitable for the on-line normalizing treatment of medium-carbon boron-containing steel sequentially comprises the following steps: heating, rough rolling, finishing rolling, cooling by passing through water, and cold bed slow cooling. The medium-carbon boron-containing steel can meet the requirements of having a hardness of 190-220 HBW, an actual grain size that is ≥7 grade, and a banded structure that is ≤2 grade.

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Patent Owner(s)

  • DAYE SPECIAL STEEL CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Ping Hubei, CN 557 5577
He, Yingwu Hubei, CN 1 0
Huang, Guopiao Hubei, CN 1 0
Ling, Xin Hubei, CN 2 0
Zhang, Nian Hubei, CN 7 21
Zheng, Wenchao Hubei, CN 6 36

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