09CrCuSb钢连铸坯的高温力学性能  

High Temperature Mechanical Property of 09CrCuSb Steel Slab

作　　者：胡海亮 朱立光 孙立根 周景一 Hu Hailiang;Zhu Liguang;Sun Ligen;Zhou Jingyi(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,Hebei,China;Hebei Engineering Research Center of High Quality Steel Continuous Casting,Tangshan 063009,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009 [2]河北省高品质钢连铸工程技术研究中心,河北唐山063009

出　　处：《钢铁钒钛》2020年第3期132-136,共5页Iron Steel Vanadium Titanium

基　　金：河北省博士研究生创新资助项目(CXZZBS2018136)。

摘　　要：采用Gleeble-3500热模拟试验机对09CrCuSb钢连铸坯的高温力学性能进行测试,得到其在650~1 300℃的应力—应变曲线、高温强度、热塑性和塑性模量的变化规律。结果表明:应力—应变曲线中,应力峰值随测试温度升高而减小,当测试温度高于700℃时,应力—应变曲线中出现应力平台现象;连铸坯试样的高温强度较差,随温度升高,其高温强度整体呈下降趋势;在2.4×10-3 s-1应变速率下,存在两个明显的脆性温度区间,第一脆性温度区间为1 200℃~熔点,第三脆性温度区间为700~800℃,在825~1 250℃时09CrCuSb钢连铸坯热塑性较好,断面收缩率均大于80%;连铸坯试样的高温塑性模量在675~1 300℃时小于660.099 MPa。The high temperature mechanical properties of 09 CrCuSb steel billet were tested by the hot tensile test technique with Gleeble-3500 system.The stress-strain curve,high temperature strength,thermo-plasticity and plastic modulus with temperature in the range of 650~1 300 ℃were obtained.The results show that in the stress-strain curve,the peak stress decreases with the increase of the test temperature.When the test temperature is higher than 700 ℃,a stress platform appears in the stress-strain curve.The high temperature strength of continuous casting slab sample is poor,and with the increase of temperature,its high temperature strength tends to decrease.At the strain rate of 2.4×10-3/s,there are two brittle temperature ranges.The range of brittleness temperature Ⅰ is 1 200 ℃~melting point,and he range of brittleness temperature Ⅲ is 700~800 ℃.In the range of 825~1 250 ℃, 09 CrCuSb steel billet shows good thermoplasticity,and its section shrinkage rate is more than 80%.The high temperature plastic modulus of 09 CrCuSb steel slab is less than 660.099 MPa when temperature is in range of 675~1 300 ℃.

关 键 词：09CrCuSb钢 连铸坯 应力—应变 高温塑性模量 高温强度 热塑性 

分 类 号：TF777[冶金工程—钢铁冶金]