The invention discloses a 900MPa high strength and high ductility of carbon hot rolled steel and its manufacturing method, its chemical composition according to the weight percentage: C:0.45 ~ 0.80%, Mn:20 ~ 30%, Si:0.01 ~ 0.20%, Al:0.02 ~ 0.10%, P = 0.015%, S = 0.015%, the balance of impurity Fe and its inevitable. The manufacturing methods, including raw material smelting, casting billet, slab heating, hot rolling and cooling processing steps, the molten steel casting billet tapping end temperature control at 1700 to 1900 DEG C; slab heating temperature control at 1150 to 1230 DEG C; rolling roughing rolling temperature control in 1010 ~ 1110 DEG C, finishing temperature control in 700 ~ 800 DEG C, coiling temperature control at 500 to 600 DEG C. Practice has proved that the steel has high strength, high elongation, high impact power, low brittleness transition temperature, good welding performance and forming performance, and its manufacturing method, process flow is simple, production cost is low.
【技术实现步骤摘要】
本专利技术属于高强钢生产
,具体地指一种900MI^级高强度高塑性中碳热 轧钢及其制造方法。
技术介绍
关于具有高强度高塑性的钢板研究,在国外主要有德国蒂森克虏伯钢铁股份公 司、阿赛洛法国公司以及韩国HYUNDAI汽车制造公司等。如阿赛洛法国公司在中国申请 号为200580042631. 9的“生产具备非常高强度和伸长性能以及良好均勻性的铁_碳-锰 奥氏体钢板的方法”专利技术专利,公开了一种热轧铁-碳-锰奥氏体钢板,其标称化学组成 包括,含量以重量计0. 85%彡C彡1. 05%,16%彡Mn彡19%,Si彡2%,Al彡0. 05%, S^O. 03%, P^O. 50%, N^O. 1%,以及任选的一种或多种选自如下的元素Cr彡1%, Mo 彡 1. 50%, Ni ^ 1%, Cu ^ 5%, Ti ^ 0. 50%, Nb 彡 0. 50%, V 彡 0. 50%,该组成的余 量由铁盒熔炼产生的不可避免的杂质组成。该钢板的强度大于1200MPa,其乘积P (强度 (MPa) X断裂伸长率(% ))大于65000MPa%,但是该钢通过添加大量合金元素来调节其显 ...
【技术保护点】
1.一种900MPa级高强度高塑性中碳热轧钢,其化学成分按重量百分数计为:C:0.45~0.80%,Mn:20~30%,Si:0.01~0.20%,Al:0.02~0.10%,P≤0.015%,S≤0.015%,余量为Fe和不可避免的杂质。
【技术特征摘要】
1.一种900MI^级高强度高塑性中碳热轧钢,其化学成分按重量百分数计为C: 0. 45 0. 80 %,Mn 20 30 %,Si :0. 01 0. 20 %,Al :0. 02 0. 10 %,P ≤ 0. 015 %, S^O. 015%,余量为!^和不可避免的杂质。2.根据权利要求1所述的900MI^级高强度高塑性中碳热轧钢,其特征在于该钢的化 学成分按重量百分数计为C :0. 50 0. 70%, Mn :21. 0 25. 0%, Si :0. 02 0. 18%, Al 0. 02 0. 10%,P≤0. 015%, S≤0. 015%,余量为!^e和不可避免的杂质。3.—种权利...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。