两相区轧制对微铌低合金钢组织和性能的影响  

Effect of Two-phase Zone Rolling on Microstructure and Mechanical Properties of Micro-niobium Low Alloy Steel

作　　者：温斌[1] Wen Bin(Anyang Iron and Steel Co.,Ltd.)

机构地区：[1]安阳钢铁股份有限公司

出　　处：《宽厚板》2023年第2期31-34,共4页Wide and Heavy Plate

摘　　要：结合Gleeble-3800热模拟试验机测定的微铌低合金钢CCT曲线,采用再结晶区轧制+未再结晶区轧制+(γ+α)两相区三阶段控制轧制工艺进行轧制试验,研究微铌低合金钢在(γ+α)两相区范围内不同变形率对组织和性能的影响,同时比较了两相区轧制与常规控轧控冷工艺轧制钢板的组织和性能。结果表明:微铌低合金钢两相区轧制工艺与常规控轧控冷工艺相比,屈服强度和抗拉强度升高,伸长率和冲击功有少许降低;两相区轧制工艺能够细化铁素体晶粒,但是也存在单个尺寸较大的铁素体晶粒。另外,随着(γ+α)两相区累计变形率的增加,微铌低合金钢的强度升高,韧塑性降低。Based on the CCT curves of micro-niobium low alloy steel determined by Gleeble-3800 thermal simulation testing machine,the effects of different deformation rates of micro-niobium low alloy steel inγ+αtwo-phase zone on microstructure and mechanical properties are studied,the microstructure and mechanical properties of steel plate rolled by two-phase zone rolling process are compared with those of steel plate rolled by conventional controlled rolling and controlled cooling process simultaneously.The results show that the yield strength and tensile strength of micro-niobium low alloy steel by two-phase zone rolling process are higher than those by conventional controlled rolling and controlled cooling process,the elongation ratio and impact aborbed energy value are lower.The two-phase zone rolling process can refine ferrite grain,but larger size single ferrite grain still exist.With the increase of cumulative deformation rate inγ+αtwo-phase zone,the strength of micro-niobium low alloy steel increases,while the toughness and plasticity decrease.

关 键 词：微铌低合金钢 两相区变形 显微组织 力学性能 

分 类 号：TG142.33[一般工业技术—材料科学与工程]