外加ZrC颗粒对低碳锰钢组织与性能的影响  

Influence of adding ZrC particles on microstructure and properties of low-carbon manganese steel

作　　者：唐明华[1,2] 刘志义[1] 胡双开[3] 李建中[3] 邓彬[2] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]湖南工学院机械工程系,湖南衡阳421002 [3]湖南衡阳钢管(集团)有限公司,湖南衡阳421001

出　　处：《材料热处理学报》2010年第5期65-70,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(59971031);湖南工学院科研重点资助项目(kyc0801)

摘　　要：采用Gleeble-1500热模拟试验机进行单向压缩热模拟试验,在实验室轧机上进行了C-Mn钢超细晶中板的轧制,研究了试验钢在形变诱导铁素体相变过程中ZrC粒子对钢的组织细化和力学性能的影响。结果表明:当ZrC粒子的粒径小于1μm时,Orowan强化机制参与材料的强化,导致组织超细化;由于ZrC/奥氏体相界面的不均匀变形,在界面产生形变位错源,使基体中的位错增殖,形成位错胞,因而提高了材料的强度;当ZrC粒子的平均粒径0.4μm、加入量为0.5%时,实验室轧后水冷可获得晶粒尺寸为3.9μm的9 mm中板,材料的抗拉强度约提高51%,综合性能显著提高。The effects of addition of ZrC particles on microstructure and mechanical properties of a low carbon manganese steel treaed by deformation induced ferrite transformation（DIFT） were investigated by unidirectional compression thermal simulating experiment on a Gleeble-1500 machine,and the plain C-Mn steel plate with ultra-fine grained ferrite was fabricated.The results show that adding ZrC particles with diameter less-than 1.0 μm strengthens the steel by multiplication of dislocations in matrix and ferrite grain refinement due to non-uniform deformation at ZrC /austenite interface.The fine microstructure with a grain size of 3.9 μm is obtained for the plate with thickness of 9 mm fabricated using the low carbon mangnese steel containing 0.5 vol%.ZrC particles with diameter of 0.4 μm.Tensile strength of the steel increases by 51% compared with that of commercial steel 20Mn2.

关 键 词：ZRC粒子 低碳锰钢 形变诱导铁素体相变 超细晶 性能 

分 类 号：TG142.4[一般工业技术—材料科学与工程]