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发明公开
CN105200317A 控轧含Ti型345Mpa级别低合金钢板及其生产方法 有权

控轧含Ti型345Mpa级别低合金钢板及其生产方法
摘要：
本发明公开了一种控轧含Ti型345Mpa级别低合金钢板及其生产方法，其由下述重量百分含量的化学成分组成：C:0.14～0.17%，Ti:0.060～0.080%，Mn:0.40～0.70%，Si≤0.50%，P≤0.035%，S≤0.035%，Nb≤0.07%，V≤0.15%，Cr≤0.30%，Ni≤0.50%，Cu≤0.30%，N≤0.012%，Mo≤0.10%，余量为Fe及不可避免的杂质。本钢板在成分设计上采用采取C-Mn-Ti的设计思路，取消Nb合金以及降低Mn合金，成本低廉，经检测本发明的钢板的常规力学性能达到下列要求：Rp0.2≥360MPa，Rm≥510MPa，A≥22%，冲击功-20℃(纵向)≥100J。本发明钢力学性能完全满足345Mpa级别低合金钢板的标准要求，具有很好的市场前景和高利润。
摘要（英）：

The invention discloses a control-rolled Ti-containing type low alloy steel plate at the grade of 345 Mpa and a production method of the control-rolled Ti-containing type low alloy steel plate. The control-rolled Ti-containing type low alloy steel plate at the grade of 345 Mpa is prepared from, by weight, 0.14-0.17% of C, 0.060-0.080% of Ti, 0.40-0.70% of Mn, smaller than or equal to 0.50% of Si, smaller than or equal to 0.035% of P, smaller than or equal to 0.035% of S, smaller than or equal to 0.007% of Nb, smaller than or equal to 0.15% of V, maller than or equal to 0.30% of Cr, smaller than or equal to 0.50% of Ni, smaller than or equal to 0.30% of Cu, smaller than or equal to 0.012% of N, smaller than or equal to 0.10% of Mo and the balance Fe and inevitable impurities. The design idea of C-Mn-Ti is adopted on the ingredient design of the steel plate, Nb alloy is omitted, Mn alloy is reduced, cost is low, and it is detected that the conventional mechanical properties of the steel plate meet the following requirements that Rp 0.2 is larger than or equal to 360 Mpa, Rm is larger than or equal to 510 Mpa, A is larger than or equal to 22%, and the impact power at minus 20 DEG C in the longitudinal direction is larger than or equal to 100 J. The mechanical properties of the steel plate can completely meet the standard requirement of the low alloy metal plate at the grade of 345 Mpa, and the steep plate has very good market prospects and high profits.

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