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发明授权
CN108396222B 一种235MPa级LP钢板及其生产方法 有权

一种235MPa级LP钢板及其生产方法
摘要：
本发明涉及一种235MPa级LP钢板及其生产方法，所述LP钢板为一端薄、一端厚的楔形钢板，LP钢板薄端的化学成分为化学成分一，LP钢板厚端的化学成分为化学成分二，LP钢板中部的化学成分自薄端向厚端由化学成分一向化学成分二过渡；LP钢板的屈服强度位于235～300MPa之间，‑20℃冲击功≥65J。本发明采用具有不同化学成分的2罐钢水浇注连铸钢坯，并使连铸钢坯沿纵向具有均匀变化的化学成分，连铸钢坯经轧制直接生产LP钢板，且LP钢板具有从薄端到厚端性能均匀一致的特点；该LP钢板的整体性能优异，适用性强。
摘要（英）：

The invention relates to a 235MPa-grade LP steel plate and a production method thereof. An LP steel plate is a wedge-shaped steel plate, wherein one end of the LP steel plate is thin and the other endof the LP steel plate is thick; chemical components of the thin end of the LP steel plate are chemical components I, and chemical components of the thick end of the LP steel plate are chemical components II; the chemical components of the middle part of the LP steel plate are transmitted to the chemical components II from the chemical components I from the thin end to the thick end; and yield strength of the LP steel plate is 235-300 MPa, and impact power of the LP steel plate at a temperature being (-)20 DEG C is higher than or equal to 65 J. Two tanks of molten steel with different chemicalcomponents are adopted to pour continuously-cast steel billets, which have uniformly-changed chemical components in the longitudinal direction, and are directly rolled to produce the LP steel plate;the LP steel plate has the characteristic of being uniform and consistent in performance from the thin end to the thick end; and the LP steel plate is excellent in integral performance and is strong in applicability.

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