摘要
奥氏体合金钢斜轧穿孔易出现缺陷,工艺参数不易确定。采用电子探针显微分析技术(EPMA)对奥氏体合金钢进行分析,获得材料成分及各种主要元素质量分数,建立材料模型,并针对该材料利用三维有限元软件Deform-3D模拟整个斜轧穿孔过程,分析了变形规律,得到等效应力分布、等效应变分布以及金属流动矢量图,模拟结果与实际变形规律相符。将模拟得到的奥氏体合金钢毛管外形尺寸与试验测量数据进行对比,管形吻合,厚度偏差最大为0.82 mm,误差率为8.0%;外径最大偏差为3.50 mm,误差率为3.7%。对试样进行晶间腐蚀试验,未发现裂纹。穿孔后试件的奥氏体微观组织均匀、晶粒得到细化。
The austenitic alloy steel rotary piercing is prone to appear defects, and the process parameters are not easy to determine. Electron Probe Micro Analysis(EPMA) technique was used to analyze the austenitic alloy steel. The composition of material was obtained as well as the proportion of various main elements, so that the material model was established. Based on this, the whole rotary piercing process was simulated by the three-dimensional finite element software Deform-3D, then the deformation law was analyzed. The effective stress distribution, effective strain distribution and metal flow vector diagram were obtained. The simulation results are consistent with the actual deformation law. The shell dimensions of austenitic alloy steel are compared with the experimental data and the outline character of both of pipes is consistent. The maximum thickness deviation is 0.82 mm, with the error rate of 8.0%, and the maximum outer diameter deviation is 3.50 mm, with the error rate of 3.7%. The intergranular corrosion test was carried out on the sample, and no crack was found. The austenite microstructure of the specimen is uniform and the grain is refined.
作者
胡建华
李靖
拓雷锋
双远华
陈建勋
HU Jian-hua;LI Jing;TUO Lei-feng;SHUANG Yuan-hua;CHEN Jian-xun(College of Material Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,Shanxi,China)
出处
《中国冶金》
CAS
北大核心
2022年第5期58-63,共6页
China Metallurgy
基金
山西省科技重大专项资助项目(20191102009)
山西省重点研发计划资助项目(201903D121049)。
