09 Mn2 Si2 V铁素体-马氏体双相钢伸长率的计算

以固体与分子经验电子理论和刘志林提出的非调质钢力学性能计算方法为理论基础，通过对双相钢的强韧化方式分析，研究了双相钢伸长率的计算模型以及方法。通过该模型计算出了09Mn2Si2V钢的理论伸长率，与真空冶炼出的09Mn2Si2V双相钢淬火后伸长率吻合较好，误差在10％以内，结果表明该钢具有良好的强韧性和塑性变形能力。     

大型截面7A09铝型材拉弯成形工艺研究

大型复杂截面的型材框在新型运载型号中有着广泛的应用。针对大型横截面积、弯曲直径为Φ5 m的型材框零件进行拉弯成形工艺研究。通过分析润滑方式、预拉力、补拉量等参数对零件回弹的影响,设计拉弯工艺参数:预拉力为450 k N,预拉包角为72°,补拉力为500 k N,补拉包角为82°,补拉量为50 mm。试验表明,采用以上工艺参数得到零件端头回弹量为2.5~3 mm,验证了工艺参数的可行性。通过试验,得到了大型截面、大弯曲直径零件的成形工艺方法,且产品满足使用要求。     

影响09MnNiD钢锻件低温冲击韧性的因素及对策

分析09MnNiD钢锻件低温冲击韧性低的原因,提出提高锻件低温冲击韧性的措施。     

09MnNiDR制2000m~3乙烯球罐的分析设计

介绍了国内首台设计温度-67℃的2 000 m3乙烯球罐设计参数的确定、球壳用钢板的选取过程。对09MnNiDR制造2 000 m3乙烯球罐的结构设计、有限元应力分析、制造和安装过程中的技术要求进行了详细分析和评价。     

Comparison of numerical and experimental responses of pavement systems using various resilient modulus models

The accuracy of the structural design of flexible pavements based on mechanistic approaches is directly related to the appropriateness of the structural response algorithm and the material resilient modulus models selected. Mechanistic response algorithms can be based on layered theory or finite element algorithms. The geomaterials can be modeled as linear or nonlinear. To evaluate the appropriateness of the numerical models and the available resilient modulus models for estimating the response of pavements, several small-scale pavements were constructed and tested under different loads, loading areas and moisture conditions. A nonlinear numerical structural model was then utilized with different resilient modulus models to match the experimental responses. With some modifications, a three-parameter nonlinear model provided the same patterns as the experimentally measured values as long as the weight of the material was considered. In all cases, a transfer function was necessary to accommodate the differences in stiffness properties due to the differences between the field and the laboratory compaction methods.     

常减压装置09 Cr2 AlMoRe材质使用现状

简要介绍我厂常减压装置初常顶部位腐蚀情况,分析了塔顶油气的腐蚀机理,重点介绍了装置塔顶空冷器管束材质升级情况以及09 Cr2 AlMoRe材质在我装置的使用现状。对装置初常顶空冷部位材质提供参考,达到避免运行过程中发生空冷管束腐蚀泄漏,延长使用寿命的目的。     

低温吸收塔的制造技术

介绍了09MnNiDR制大型低温吸收塔的关键制造技术。     

Calculations of the tritium re-emission rate in the DEMO first wall

The deuterium and tritium re-emission fluxes from the first wall (FW) of the DEMO reactor have been calculated. The influence of temperature of the first wall (FW), surface conditions, and trapping in neutron-produced defects on the tritium re-emission rate has been considered.