Low-deformation-resistance high-strength steel and production method and application thereof

The invention discloses low-deformation-resistance high-strength steel. The low-deformation-resistance high-strength steel comprises, by mass, 0.04%-0.09% of C, 0.03%-0.15% of Si, 1.65%-1.89% of Mn, smaller than or equal to 0.0010% of P, smaller than or equal to 0.0005% of S, 0.10%-0.20% of Cr, 0.08...

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Bibliographische Detailangaben
Hauptverfasser: ZHANG PENGWU, WANG JIANLI, WANG SHISEN, HU TANGGUO, PI XINYU, HONG XIA, CAO BINGLEI, LEI TING, SONG ZHONGHUA
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses low-deformation-resistance high-strength steel. The low-deformation-resistance high-strength steel comprises, by mass, 0.04%-0.09% of C, 0.03%-0.15% of Si, 1.65%-1.89% of Mn, smaller than or equal to 0.0010% of P, smaller than or equal to 0.0005% of S, 0.10%-0.20% of Cr, 0.08%-0.17% of Mo, smaller than or equal to 0.20% of Nb, Ti and V, smaller than or equal to 2 ppm of H and the balance Fe and unavoidable impurities. A production method comprises the following processes of smelting, hot charging and hot conveying, rolling, straightening and heat treating in sequence. When the low-deformation-resistance high-strength steel is applied, a low-deformation-resistance high-strength steel plate with the thickness of 3.00 mm-8.01 mm, the length smaller than or equal to 12m, the strength grade of 750-900 MPa and the springback amount smaller than or equal to 4 mm is applied to automobile suspension arm manufacturing, and the springback amount in the length direction after overall bending is sm