GCr15钢制钉模复合强韧化工艺研究

通过失效分析和脆断机理研究，对制钉模的失效原因进行了深入分析，在此基础上对复合处理工艺进行了改进；改进后复合处理的G015钢制钉模具有较高的强度和韧性，基本上避免了早期脆性断裂。     

WF5-40模具扁钢连轧机组离线模拟软件的开发

为了便于在现场实际生产前了解思是过程中的工艺参数及安全情况,地现场实际生产工艺进行离线模拟,为抚顺特种钢钢铁公司开发了离线模拟软件,该软件可计算轧制过程中各道 次各机架的变形力学参数（包括轧制宽展、帽速度、变形温度、变形抗力、轧制力、轧制力矩和功率等）进行设备校核,现场应用结果表明,该软件对ＷＦ５－４０模具扁钢的生产具有重要指导作用。     

Properties of 3Cr2W8V Die Steel With Striations Processed by Laser

 The striations on the surface of 3Cr2W8V die steel were processed by laser. The microstructure, hardness, wear resistance and thermal fatigue behavior of the specimens processed by laser were measured. The appearance and mechanism of thermal fatigue crack propagation in the zone processed by laser were observed and discussed. The results show that the wear resistance and thermal fatigue resistance of materials processed by laser are all better than those of the unprocessed material. The processed zone by laser plays a role in baffling wearing process and crack propagation. The pile nail effect of processed zone is the main factor for improving the wear resistance and thermal fatigue resistance of material.     

TC4合金锥体模锻过程的数值模拟

采用刚塑性有限元法对钛合金锥体的模锻成形进行有限元数值模拟,分析了锥形件模锻过程中的金属流动规律,应力场、应变场、变形区的压力分布,压力的变化规律等。模拟结果表明,锥体模锻成形分为3个阶段:初期变形过程是圆柱体变形为一个小曲率壳体的阶段,应力主要集中在上模的正下方,应变主要发生在此变形区;变形中期是与下模相接触的部分参与变形的体积逐渐增大,直至最后形成所需要的锥体形状;变形后期由于摩擦作用产生严重的不均匀壁厚减薄现象。     

Modeling of Microstructure Evolution in 22MnB5 Steel during Hot Stamping简

Automobile manufacturers have been inereasingl~r adopting hot-stamped parts for use in newly designed ve- hicles to improve crash worthiness and fuel efficiency. However, the simulation of hot stamping is rather complex and challenging, and further research still needs to be done on hot stamping hardening mechanism. The microstruc- ture evolution and hardening mechanisms during hot stamping of 22MnB5 steel were thoroughly investigated, using information provided in the literatures as well as experimental results. New models were developed to predict the grain growth during heating and the flow stress of a manganese boron steel （22MnB5） with high hardenability by the Gleeble simulation experimental results. The deformed austenite decomposition during stamping and quenching was emphatically quantified based on the transformation thermodynamic and kinetic theories, and the relationship of mi- crostructure to properties was analyzed. The results showed that the optimal process to obtain homogeneous and small lath martensite is heating at 900--950 ℃ for 5 min and then auenching at 50 ℃/s with a Dressing time about 8 s.     

超细WO3粉体的制备及表征

通过胶溶法、溶胶 凝胶法、聚合 络合法合成了超细三氧化钨粉体。并对 3种制备方法的不同制备条件进行了探讨 ,实验发现不同制备条件对三氧化钨粉体粒径有较大影响 ,研究得出了每种方法的最佳制备条件。胶溶法中pH约为 4.60 ,静置 2 4h ,加入十六烷基三甲基溴化铵(CTAB)浓度为 0 .15mol·L- 1 ;溶胶 凝胶法中pH约为 2 .3 1,加入草酸和CTAB浓度分别为 0 .40和 0 .2 0mol·L- 1 ;而聚合 络合法中前驱体在 2 5 0℃干燥后 ,在 60 0℃煅烧接着再在 65 0℃煅烧。用激光粒度仪、比表面测定仪、XRD和TEM对产品进行了表征 ,结果表明所制三氧化钨为正交晶系 ,平均粒径在 5 0～ 2 0 0nm。团聚粒子大小不均 ,粒径范围较宽 ,颗粒为不规则形状。胶溶法制备的粒子的粒径较其他两种方法更小、更均匀。     

扩大烧结用进口矿粉品种的试验研究

本文简述了扩大烧结用进口矿粉品种的必要性，介绍了烧结料中分别配加巴西CVRD、MBR、印度GOA和澳洲Goldwonhy四种矿粉的烧结杯试验情况，根据试验结果探讨了烧结配用以上四种进口矿粉的可行性。     

镁及镁合金挤压模具的设计特点

论述了镁及镁合金挤压工模具的特点及与铝及铝合金挤压工模具的异同,分别介绍了镁及镁合金棒材模、无缝管材模、型材模及平面组合模的设计要点并举例说明,对指导生产实践有一定的价值。     

挤压模障碍角作用误区

型材挤压的流动均匀性关系到制品尺寸的稳定性，目前常用的控制流动的方法是调整挤压模工作带的大小，采用先导模，扁挤压筒，开促流角，障碍角等措施。开障碍角的办法由于其自身的可操作性问题和增加阻力机理不明确，并没有广泛地应用。作者针对这一情况对障碍角的作用从模拟实验和理论角度进行了探讨，分析并指出了障碍角作用的误区。     

微细粒嵌布钛铁矿石选矿工艺研究

针对云南某钛铁矿石嵌布粒度较细,与脉石的连生的关系复杂的特性进行了详细的试验研究,采用了粗选抛尾、粗精矿再精选的工艺流程选别该矿石,获得了较好的选矿指标。