钢板、构件和它们的制造方法
By controlling the cold rolling and annealing process parameters and composition, acicular austenite and martensite phase transformations are formed, solving the problems of high ductility and elongation flange formability of high-strength steel plates. This achieves high ductility and excellent chemical conversion treatment properties of 980MPa grade steel plates, suitable for stamping products with complex shapes.
CN117980520BActive Publication Date: 2026-07-17JFE STEEL CORP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JFE STEEL CORP
- Filing Date
- 2022-09-09
- Publication Date
- 2026-07-17
Smart Images
Figure CN117980520B_ABST
Abstract
本发明提供具有高强度、高延展性、优良的延伸凸缘成形性和良好的化学转化处理性的钢板、构件和它们的制造方法。一种钢板，其中，设定成以质量％计含有特定量的C、Si、Mn、P、S、sol.Al、N的成分组成，将多边形铁素体、上贝氏体、残余γ、新鲜马氏体、回火马氏体和下贝氏体的合计、余量组织设定为特定的比例，将等效圆直径小于0.8μm的新鲜马氏体粒子和残余γ粒子的个数设定为特定的比例，将长径比为2.0以上且等效圆直径为0.8μm以上的新鲜马氏体粒子和残余γ粒子的个数设定为特定的比例。
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