轧制工艺对12MnNiVR钢板焊接性能的影响  

Influence of Rolling Process on Weldability of 12MnNiVR Steel Plate

作　　者：杨云清 华浩 高擎 汪后明 李玉路 

机构地区：[1]华菱湘潭钢铁公司

出　　处：《宽厚板》2013年第4期5-8,共4页Wide and Heavy Plate

摘　　要：通过模拟不同轧后冷却速度,研究了新一代原油储罐用12MnNiVR钢板的组织和性能变化,分析了轧后冷却速度对钢板大线能量焊接的影响规律。提高轧后冷却速度可以细化HAZ区的晶粒,并使钢中析出的碳氮化物尺寸减小、数量增多,从而降低了焊接热循环后HAZ区的强度和韧性损失。By simulating different cooling rates after rolling, microstructure and property changes of 12MnNiVR steel plate for new generation crude oil storage tank are investigated, the influencing law of cooling rate after rolling on high heat input welding of steel plate is analyzed as well. Increased cooling rate after rolling can improve HAZ grain re- finement ,reduce the size and increase the quantity of earbonitride precipitates in steel, thus decreasing strength and toughness loss at HAZ after welding thermal cycle and satisfying the requirements of high heat input welding.

关 键 词：冷却速度 大线能量 焊接 

分 类 号：TG335.5[金属学及工艺—金属压力加工]