Abstract

Hot compression tests of 06Cr19Ni9NbN steel were conducted at strain rates of 0.005-5 s⁻¹ and temperatures of 900-1200 °C on a Gleeble 1500 thermo-mechanical simulation tester. Based on the true stress-true strain data, processing maps of the steel were established. The influences of the temperature and strain rate on the processing map were analyzed in detail. The optimal process parameters for hot compression were determined to be in the temperature and strain rate ranges of 1000-1200 °C and 0.005-0.1 s⁻¹, respectively. Plane strain compression experiments were conducted using the recommended process parameters. A temperature of 1200 °C and reduction ratio of 38% are the recommended compression parameters, yielding a grain size of 74 µm. The mechanical properties of the material after compression were obtained by tensile tests at room temperature. The mechanical properties were optimal at 1200 °C and a reduction ratio of 38%. The elongation, area reduction, yield strength, and tensile strength were 63.69%, 76.12%, 281 MPa, and 703 MPa, respectively. The results of the plane strain compression experiments and tensile tests were consistent with the processing map results, indicating that the processing maps were accurate for optimizing the compression process parameters.

中文翻译：

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基于加工图的06Cr19Ni9NbN钢平面应变压缩工艺优化

摘要

在Gleeble 1500热机械模拟测试仪上，以0.005-5 s ^-1的应变速率和900-1200°C的温度对06Cr19Ni9NbN钢进行了热压缩测试。基于真实应力-真实应变数据，建立了钢的加工图。详细分析了温度和应变速率对加工图的影响。确定用于热压的最佳工艺参数在1000-1200°C和0.005-0.1 s ^-1的温度和应变速率范围内， 分别。使用推荐的工艺参数进行了平面应变压缩实验。推荐的压缩参数为温度1200°C，压下率38％，晶粒尺寸为74 µm。压缩后材料的机械性能通过室温下的拉伸试验获得。机械性能在1200°C和38％的压下率下达到最佳。伸长率，面积减小率，屈服强度和拉伸强度分别为63.69％，76.12％，281 MPa和703 MPa。平面应变压缩实验和拉伸试验的结果与加工图结果一致，表明加工图对于优化压缩工艺参数是准确的。