Wuhan Iron and Steel Company Limited

Xiaoping Duan

Tao Peng

Libo Pan

Fang Fang

Rui Ge

Shuize Wang

Xinping Mao

Kuanhui Hu

Lijun Li

A press hardening steel by a thin slab and having a tensile strength of 1900 MPa or more includes following components by weight: C: 0.31-0.40%, Si: 0.36-0.44%, Mn: 1.6-2.0%, P&#x2264;0.006%, S&#x2264;0.004%, Als: 0.015-0.060%, Cr: 0.36-0.49%, Ti: 0.036-0.045% or Nb: 0.036-0.045% or V: 0.036-0.045% or a mixture of any two or more of the above in any proportion, B: 0.004-0.005%, Mo: 0.26-0.35%, and N&#x2264;0.005%. A method for producing the press hardening steel includes following steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking furnace; heating and soaking; high pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.

1900 MPa grade press hardening steel by thin slab casting and directly rolling and method for producing the same

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Hubei, China

Xiaoping Duan