PEPSET 树脂自硬砂工艺性能及其影响因素的研究

通过试验研究了PEPSET树脂自硬砂工艺应用于铝铸件生产的性能及其影响因素。指出 PEPSET 树脂自硬砂工艺在硬化速度、流动性、发气性、溃散性等方面性能良好, 利于复杂铝铸件的造型制芯,有望成为树脂自硬砂工艺的一个重要发展方向。     

Effect of freeze–thaw cycles and additives on rheological and sensory properties of ready to bake frozen chapaties

The wheat grains were conditioned at 18% moisture level for 1 h followed by heating for 80 s in a microwave oven to reduce the activity of polyphenol oxidase as well as other lipolytic and oxidative enzymes. The dough samples were prepared from whole wheat flour (milled from microwave treated wheat grains) using 68% water and 2% salt on flour weight basis as common ingredients. The additives like glycerol monostearate and glycerol (5% and 1% respectively on flour weight basis) were also used in order to study their effects on the quality of ready to bake frozen chapaties (R-BFC) during freeze–thaw cycles. Alveographic properties of R-BFC as well as textural profile and sensory quality of chapaties prepared from R-BFC samples were evaluated during repeated freeze–thaw (FT) cycles. Results showed that the alveographic properties (P, L, and W) decreased significantly ( P  ≤   0.05) in all the samples after each FT cycle, while glycerol added samples showed the least changes. Chapati hardness increased in all the samples up to fourth FT cycle, thereafter sharply decreased. However, chapaties with 1% glycerol were rated better in terms of mouth feel and texture during FT cycles.     

青稞饼干工艺的研究

利用青稞粉和面粉为主要原料,加入奶油、糖、鸡蛋、食品添加剂等辅料,研究开发青稞饼干.实验表明,青稞粉与面粉最佳配比为5:1,最佳配方为:小苏打:人造奶油:白砂糖的质量比为0.8:30:26,焙烤条件为200℃,10 min,可以得到风味较好的青棵饼干.     

新工艺对ELC-BH钢板厚向各层织构的影响

采用极图分析方法，研究了一种使ｒ↑－值显著提高的新工艺对超低碳高强度烘烤硬化钢板冷轧和退火织构沿析厚分布的影响。结果表明，它们厚向各层的分布存在一定差异，退火板的γ纤维强织构极强，尤其是板心部强度明显高于表层；冷轧板的织构有利于退火板中γ纤维织构发展且心部织构作用较表层更大。     

Investigation of the “Surface” and “Interphase” Composition of Adhesion Promoter/Thermoplastic Olefin Systems: The Effect of Adhesion Promoter Bake Temperature

The interfacial chemistry of model systems consisting of two adhesion promoting primers and a single Thermoplastic Olefin (TPO) substrate was examined. Two commercial adhesion promoter (AP) materials were applied to a commercially-available TPO material and either flash dried at room temperature or baked at 100°C. The surface composition of the AP films and TPO substrate, and the interfacial compositions of the AP/TPO systems were characterized using x-ray photoelectron spectroscopy (XPS). The AP films studied were based upon a chlorinated polyolefin (CPO). For one adhesion promoter film (AP-1), no chlorine was present at the surface suggesting a nonhomogeneous system. For the second adhesion promoter film (AP-2), the surface composition was about 15% CPO and 85% AP matrix. No changes in AP surface composition were evident for the different bake conditions for either AP. Interfacial compositions of the room temperature flashed materials were found to be very similar for both AP/TPO systems, with CPO being present for each and at similar concentrations. Interfacial compositions for the baked materials were also similar for the two systems, although the level of CPO at the interface increased for both the AP-1 and AP-2 relative to the unbaked materials. The relative increases observed were 46% and 41% for the AP-1 and AP-2 systems, respectively. The increase in the relative concentration of CPO at the interface with bake temperature suggests that there is a stronger interaction between the AP and TPO. The implication of these data is that a baked AP should result in a more robust paint system with respect to AP/TPO adhesion.     

Thermal design of hot plate for 300-mm wafer heating in post-exposure bake

Temperature uniformity of a wafer during post-exposure bake (PEB) in lithography is an important factor in controlling critical dimension (CD) uniformity. In this study, a new hot plate system for the PEB of a 300-mm wafer was analyzed and designed. First, temperature deviation on the wafer caused by warpage was investigated, and the heater pattern of the multi-zone hot plate in the bake system was numerically analyzed. Then, a new heater pattern to enhance the temperature uniformity was proposed and tested experimentally. As a result, temperature uniformity within 0.087 °C on a 300-mm wafer was achieved.     

汽车用烘烤硬化钢板拉伸性能的温度敏感性

对汽车外覆盖件用BH220烘烤硬化钢进行了不同温度(室温～180℃)的单向拉伸试验,主要研究了变形温度对BH220钢拉伸性能的影响.结果表明:BH220钢拉伸性能具有明显的温度敏感性;随着温度的升高,屈服强度、抗拉强度和屈强比呈先降低又升高的规律,其临界温度为120℃左右;强度系数K随温度升高呈下降趋势,硬化指数n呈先...     

Thermomechanical treatment for enhancing gamma fiber component in recrystallization texture of copper-bearing bake hardening steel

A two-step rolling-annealing process has been developed to increase the 〈1 1 1〉//ND (γ fiber) component in the recrystallization texture of a copper-bearing bake hardening steel. The two step process comprises the first rolling by a low reduction in thickness and subsequent annealing at 780 °C, followed by the second rolling by a high reduction and subsequent annealing at 780 °C. The first rolling process aims at seeding the γ fiber oriented grains, so that they can grow at the expense of differently oriented grains developed in the second rolling process. In this way the density of γ fiber component in the recrystallization texture of the bake hardening steel much increases compared with that in the conventional one-step rolling-annealing process.     

负极材料预处理对锂离子电池性能的影响

锂离子电池的制造工艺技术要求非常严格,在电池制作过程中,会根据实际情况对生产工艺进行相应的调整和改进。负极材料是影响电池性能的主要因素之一,关于负极材料的预处理很重要。对负极粉料合浆前的预烘烤工艺进行了研究,实验结果显示对于水系负极制作的电池,负极粉料不烘烤对各方面性能影响不大。     

热反应鸡粉、鸡肉膏及其在卤制品(盐焗鸡制品)中的应用

通过介绍热反应鸡粉、鸡肉膏的特点,以及他们的调味增香机理,通过比较拌合型香精特点,从盐焗鸡翅制品的产品风味等方面阐述了应用肉味调味料的必要性,利用富农产品天然、营养,耐高温等优势,通过盐焗鸡翅的生产工艺配方应用举例,确定热反应鸡粉、鸡肉膏在盐焗鸡翅制品中广泛的应用。