热轧Q235碳钢复合板有限元模拟及试验分析  

Finite Element Simulation and Experimental Analysis of Hot-rolled Q235 Carbon Steel Composite Plate

作　　者：牛高林 李海斌[1] 徐惠婷 宁可[1] 李扬[1] 帅美荣[1] 祁宏鹏 NIU Gaolin;LI Haibin;XU Huiting;NING Ke;LI Yang;SHUAI Meirong;QI Hongpeng(Heavy Machinery Engineering Research Center,Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030000,China)

机构地区：[1]太原科技大学重型机械教育部工程研究中心,山西太原030000

出　　处：《热加工工艺》2024年第24期28-33,共6页Hot Working Technology

基　　金：国家自然科学基金资助项目(51875382);太原科技大学研究生创新项目(SY2022085,SY2023022)。

摘　　要：通过热力耦合有限元仿真计算了不同压下率的不锈钢/碳钢复合板热轧过程中温度变化与轧后残余应力。结果表明,轧制结束后,对碳钢而言,压下率20%试样比10%的试样温度低18℃,压下率为35%时,温度下降速率明显变快,比10%试样温度降低52℃;压下率40%试样比10%试样温度低67℃。对不锈钢而言,压下率由10%增加至20%时,试样平均残余应力由63.7 MPa提高至81.7 MPa;压下率增加至35%,平均残余应力为141.5 MPa;压下率40%试样的残余应力最大。实验结果表明,基板碳钢中珠光体体积分数随平均残余应力增加而减小。未轧制试样珠光体体积分数为12%;当压下率达到40%,珠光体体积分数仅为5%。The temperature variation and residual stress after hot rolling of stainless steel/carbon steel composite plates with different reduction rates were calculated by thermodynamic coupling finite element simulation.The results show that after rolling,for carbon steel,the temperature of the sample with reduction rate of 20%is 18℃lower than that of the sample with reduction rate 10%.For stainless steel,when the reduction rate is 35%,the temperature drop rate is significantly faster,and the temperature is 52℃lower than that of the sample with reduction rate of 10%.The sample with reduction rate of 40%temperature is 67℃lower than the reduction rate 10%sample temperature.When the reduction rate increases from 10%to 20%,the average residual stress increases from 63.7 MPa to 81.7 MPa.When the reduction rate is increased to 35%,the average residual stress is 141.5 MPa.The reduction rate 40%sample has the highest residual stress.The experiment results show that the volume fraction of pearlite in carbon steel decreases with the increase of the average residual stress.The pearlite volume fraction of the unrolled sample is 12%.When the reduction rate reaches 40%,the pearlite volume fraction is only 5%.

关 键 词：热轧复合板 有限元仿真 残余应力 珠光体体积 

分 类 号：TG335.11[金属学及工艺—金属压力加工]