23-06-2023 дата публикации
Номер: CN116288072A
Автор:
JU YINJUN,
GAO QING,
XU RUIJUN,
LYU ZIYU,
LUO JINGXIAN,
LUO XIONGZHI,
YANG JIANHUA,
GU CHAO,
BAO YANPING,
ZENG FANZHENG,
LUO XIAO,
YUAN YUAN,
SHEN FENG
Принадлежит:
The invention discloses a production method of non-quenched and tempered steel. The steel comprises the following chemical components in percentage by weight: 0.36-0.40% of C, 0.75-0.85% of Si, 1.40-1.55% of Mn, less than or equal to 0.015% of P, 0.055-0.075% of S, 0.12-0.16% of Cr, 0.008-0.020% of Al, 0.01-0.03% of V, less than or equal to 0.0006% of O, less than or equal to 0.018% of N and the balance of iron and inevitable impurities. The grain size of the steel is 9.0 grade or above, and the banded structure is smaller than or equal to 1.0 grade. According to the method, dispersion distribution of oxides is achieved by regulating and controlling the composition of the non-quenched and tempered steel and utilizing the methods of accurately controlling the slag amount of a converter, controlling the alloy adding time, adjusting the LF refining process, prolonging the RH on-site time and the like, then manganese sulfide in the non-quenched and tempered steel is evenly distributed, the ...
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