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CN102796953A 一种铌镧微合金化Si-Mn系热成形钢板及其热处理工艺 无效 - 撤回

一种铌镧微合金化Si-Mn系热成形钢板及其热处理工艺
摘要：
一种铌镧微合金化Si-Mn系热成形钢板及其热处理工艺，属于冶金技术领域，涉及成形工艺技术，其特征在于板坯的（重量百分比）化学成分为：C 0.16%-0.35%，Si 0.6%-1.6%，Mn 1.5%-2.0%，P≤0.015%，S≤0.005%，Nb0.01%-0.06%，La0.001-0.3%，余量为Fe和不可避免的杂质。热处理工艺制度为：奥氏体化温度890-940℃，保温时间0.5-3小时后水淬；回火温度190-300℃，保温时间3-10小时。成品钢板厚度为5-30mm，其力学性能优良，抗拉强度达到1450-1700MPa，屈服强度1150-1300MPa，延伸率8-15%。
摘要（英）：

The invention discloses a niobium-lanthanum microalloyed Si-Mn thermoformed steel plate and a heat treatment technique thereof, belonging to the technical field of metallurgy and relating to a forming technology. The invention is characterized in that the plate blank comprises the following chemical components in percentage by weight: 0.16-0.35% of C, 0.6-1.6% of Si, 1.5-2.0% of Mn, at most 0.015% of P, at most 0.005% of S, 0.01-0.06% of Nb, 0.001-0.3% of La, and the balance of Fe and inevitable impurities. The heat treatment technique comprises the following steps: after keeping the austenitizing temperature of 890-940 DEG C for 0.5-3 hours, quenching with water; and keeping the tempering temperature of 190-300 DEG C for 3-10 hours. The finished steel plate is 5-30mm, and has favorable mechanical properties: the tensile strength is up to 1450-1700 MPa, the yield strength is 1150-1300 MPa, and the elongation percentage is 8-15%.

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