ZL101合金锶变质效果及热处理工艺的改进

对现场生产的ZLl01合金铸件材质进行了全面分析，针对存在的产品成分不准，变质效果不好，力学性能不合格的问题，通过改进合金的锶变质工艺和热处理工艺，改善了合金的组织和性能，达到了对材料的成分、性能的各项要求。     

钙铁硅铁磁体微晶玻璃热处理制度的研究

使用XRD、DTA、VSM等分析测试手段对在还原气氛下含少量B2O3、P2O5钙铁硅微晶玻璃的热处理制度进行了较深入的研究。研究发展，预核化处理对于钙铁硅微晶玻璃的晶化无明显作用。900℃作为钙铁硅微晶玻璃的晶化温度较适宜，晶化时间宜8h以上。     

Optimizing the Vacuum Heat-Treatment of Hot-Work Tool Steels by Linear Elastic Fracture Mechanics

Linear elastic fracture mechanics was used to optimize the vacuum heat-treatment procedures for conventional hot-work AISI H11 tool steel. The fracture toughness was determined with non-standard, circumferentially notched and fatigue-precracked tensile-test specimens. The fracture-testing method is sensitive to changes caused by variations in the microstructure resulting from the austenitizing and tempering temperatures as well as the homogeneity of the material itself. The combined tempering diagram- Rockwell-C hardness, Fracture toughness K_Ic, Tempering temperature was used for the choice of the vacuum heat-treatment parameters necessary to obtain the best properties for a given application with respect to the investigated steel.     

超前扩展点的诱导

用人为的方法,在表面温度高于T1时产生超前扩展点的做法叫做超前扩展点的诱导.用液态介质中冷却的四阶段理论分析指出:通过诱导产生超前扩展点可以克服自然超前扩展点的随机性,可以提高工件获得的冷却速度,还可以减小工件上的冷却速度差异.提出了两种诱导超前扩展点的方法:诱导锥法和冲液法.用实际的诱导试验演示了这两种方法的诱导效果.超前扩展点的诱导将成为精细淬火冷却技术中的一项基本方法.     

Effect of deposition conditions on the properties and annealing behavior of cold-sprayed copper

The deposition of copper by cold gas dynamic spraying has attracted much interest in recent years due to the capability to deposit low-porosity oxide-free coatings. However, it is generally found that as-deposited copper has a signicantly greater hardness, and potentially lower ductility, than bulk material. In this article, copper was deposited by cold spraying using helium as the driving gas at both 298 and 523 K. Evidence is presented indicating that the material sprayed at the lower temperature exhibits a lower dislocation density throughout the grain structure than the material sprayed at the higher temperature. The low stacking fault energy of copper restricts recovery during annealing, and thus microstructural changes during annealing only proceed once recrystallization begins. The material sprayed at low temperature (with the low dislocation density) exhibited recrystallization at annealing temperatures as low as 373 K with a corresponding reduction in hardness. However, the copper sprayed with helium at 523 K was resistant to annealing at temperatures up to 473 K where the dislocations in the structure prevented recrystallization. However, at higher temperatures, recrystallization did proceed (with corresponding reductions in hardness). The fracture behavior of the copper that was cold sprayed with helium at 523 K, both in the as-sprayed condition and following annealing, was measured and explained in terms of the annealing mechanisms proposed. The original version of this paper was published in the CD ROM Thermal Spray Connects: Explore Its Surfacing Potential, International Thermal Spray Conference, sponsored by DVS, ASM International, and HW International Institute of Welding, Basel, Switzerland, May 2–4, 2005, DVS-Verlag GmbH, Düsseldorf, Germany.     

5CrMnMo钢中、小型热锻模具的强韧化热处理

5CrMnMo钢中、小型热锻模具经强韧化工艺处理后与经常规工艺热处理相比，强韧性、疲劳抗力和使用寿命显著提高，且工艺简单，操作方便，质量稳定。     

Studies on Preparation of Onion-like Fullerenes by Vacuum Heat-treatment

Onion-like Fullerenes were produced at high-temperature in vacuum. The morphology of the carbon nano onion-like fullerenes was examined and characterized by high-resolution transmission electron microscopy (HRTEM). It can be seen that the nano-sized, onion-like fullerenes possess high degree of graphization. The results suggested that the catalyst is the main factor affecting the size and yield of the fullerenes. The method is very promising for simple mass production.     

触变成形镁合金的热处理研究

介绍了触变成形镁合金的热处理研究现状以及合金元素在热处理过程中的作用,热处理过程中的析出相形态、数量以及在基体中的分布与合金的力学性能有着密切的联系.     

热处理对铝-钢爆炸复合板交界区的影响

研究了铝-钢爆炸复合板交界区经热处理(300℃,350℃,400℃,450℃)×20min后的组织和性能.结果表明,爆炸状态下,Fe-Cu-Al界面发生合金元素的扩散,形成了合金元素的成分过渡区.其中,Cu-Al交界处的扩散较为明显,合金元素扩散的距离较长,Al元素的扩散能力较强,但未见析出物.450℃×20 min热处理后,Cu-Al交界区有明显的析出物;爆炸使Cu-Al界面产生了明显的硬化效应,随着热处理温度的提高,硬度峰值增加,350℃后的热处理,硬度峰值变化不明显;爆炸状态下,Cu-Al界面的剪切强度满足了使用性能的要求.     

含Zr多晶Ni3Al合金在不同热处理温度下的组织与性能

研究了冷轧多晶Ni3Al-(0．2％，0．6％，1．0％，1．5％)Zr(原子分数)合金在不同热处理温度(800-1100℃)下的显微组织和力学性能，结果表明，适当的热处理温度，可使无硼Ni3Al-Zr多晶合金获得优良的室温拉伸强度和塑性，随着热处理温度的升高，不同Zr含量Ni3Al合金的再结晶体积分数增加，再结晶晶粒尺寸增大，室温拉伸强度下降．随着合金中Zr含量的增加，再结晶温度降低，再结晶晶粒尺寸减小．不同Zr含量Ni3Al合金的拉伸塑性明显依赖于热处理温度，对于低Zr(0．2％)合金，在1000℃热处理后，拉伸塑性最佳；对于中Zr(0．6％)合金，在850℃热处理后，拉伸塑性达到最大值；对于高Zr(≥1．0％)合金，拉伸塑性峰值出现在900℃热处理下，当热处理温度超过900℃，拉伸塑性显著降低。