SURFACE COMPOSITE GEAR AND PIPE MADE BY SEPARATED EUTECTIC TECHNOLOGY

1.IntroductionTheeutecticgroWthisoftenconsideredtobesimilartothatofpuremetals,becauseittakesp1aceathatemperatureneartheequilibriumtemperature.Thusthereisnoin-trinsicreasonforoccurrenceofmacroscopicsegregationofconstituentelements.However,itisrecentlyfoundthatsomeeutecticscouldbeseparatedonmacroscopicscalewhiletheothersareimpossibleI1'2].Inordertosearchouttheformativemechanismoftheseparatedeutecticphenomenon,about26kindsofbinaryeutecticsareusedtoinvestigatewhetherornottheseparatedeutecticiscon…     

基体碳对C/CF/Cu复合材料的影响

采用树脂碳化和碳气相沉积相结合的方法制备了碳/碳纤维(C/CF)先驱丝,用压力浸渗凝固成型方法制备了碳/碳纤维/铜(C/CF/Cu)复合材料,借助于扫描电镜下复合材料界面和相分布观察以及显微硬度和滑动摩擦磨损测试,探讨了基体碳(树脂碳化碳和沉积碳)对C/CF/Cu复合材料成型、显微硬度及摩擦磨损的影响.结果表明,碳化和碳气相沉积处理的C/CF先驱丝相对致密并阻碍铜液的压力浸渗成型,但该先驱丝硬度高于碳化处理的C/CF先驱丝.碳化和碳气相沉积处理的C/CF/Cu复合材料滑动摩擦磨损耐磨性高于纯铜,而且滑动摩擦系数也高于纯铜.C/CF/Cu复合材料是一种具有摩阻功能的复合材料.     

稀土与热处理对高碳铬铸钢碳化物的形态及冲击韧性的影响

研究了稀土与热处理对高碳铬铸钢碳化物的形态及冲击韧性的影响。结果表明，稀土和热处理均能改善高碳铬碳钢碳化物的形态与分布，提高其冲击韧性，尤其稀土与热处理共同作用时，效果更显。     

覆盖层上面板堆石坝筑坝材料反演分析与安全性研究

以双溪口面板堆石坝实测沉降监测资料为基础,通过基于免疫遗传算法的位移反分析法对堆石料E-B模型参数进行反演分析,获取了符合工程实际的模型参数。根据反馈分析得到的计算结果,采用邓肯-张弹性非线性E-B模型,分析研究了大坝竣工期及蓄水期的变形及应力分布状态,计算结果表明,大坝蓄水期位移增量较小,面板应力正常,大坝运行安全。     

安图地方电网66kV·A白线联网存在的问题及对策

安图县建有独立运行的地方水电网,通过66kV.A白线与国家电网联网,由于地域南北狭长,输电距离远,电网结构薄弱,影响了地方电网的供电可靠性。本文从提高安图地方水电网的供电可靠性出发,针对66kV.A白线联网存在的问题,提出了解决的具体方案。     

The effect of steaming on the free amino acid contents and antioxidant activity of Panax ginseng

This study was carried out to investigate changes in the free amino acid contents and antioxidant activity of Panax ginseng induced by steaming at different temperatures. For this purpose, white ginseng (WG), red ginseng (RG, ginseng steamed at 100 °C) and ginseng steamed at 120 °C (SG) were prepared using an autoclave. Most free amino acids were decreased significantly by steam treatment, with the greatest reduction observed in SG. Total content of free amino acids, 17.9 mg/g in WG was reduced to 12.2 mg/g in RG and 2.79 mg/g in SG. As for Arg which is the most predominant amino acid in ginseng, the content, 10.4 mg/g in WG, decreased significantly to 1.38 mg/g in SG. In particular, β-N-oxalyl-L-α,β-diaminopropionic acid (β-ODAP), a well-known neurotoxin, was reduced by 92.9% in SG. In contrast, the level of Maillard reaction products (MRPs) increased with steam treatment, which indicates that the reduction of most amino acids is attributed to the extent of the Maillard reaction. Based on MRPs being useful antioxidants, we assayed the scavenging activity against free radicals produced by 2,2′-azobis-(2-amidinopropane) dihydrochloride (AAPH). The radical scavenging activity of a ginseng extract increased with steam treatment, with the most potent activity in SG. Further, MRPs-rich fraction in SG showed powerful antioxidant activity, which indicates MRPs are major contributors to antioxidant activity enhanced by steam treatment.     

Scorpion仪器源驱动功能的开发运用

Scorpion仪器的源驱动生产方式能有效控制激发点精度,提高施工效率与资料品质。本文从引进设备功能开发运用着手,介绍了源驱动的工作原理,源驱动功能的开发、实现方法及其运用效果。详细地阐述了使用源驱动方式生产前Scorpion仪器及ShotProⅡ译码器相关参数的设置方法。     

强有机溶剂型清防蜡剂SG-3

Ｓ Ｇ３ 是针对辽河曙光油田曙三区开发的性能优良的强有机溶剂型清防蜡剂。本文介绍了 Ｓ Ｇ３ 的配方组分,探讨了清防蜡作用机理及影响清防蜡效果的因素,报道了在辽河曙光油田２２ 口井现场应用的效果。     

燃气脉冲吹灰技术在催化裂化装置余热锅炉上的应用

吉化炼油厂催化裂化装置余热锅炉受热面采用螺旋翅片管结构，积灰严重，在第七0三研究所的积极参与合作下，哈尔滨哈宜电站设备研究研制开发了燃气脉冲吹灰装置系列产品，并应用于吉化炼油厂催化装置余热锅炉。应用结果表明，燃气脉冲吹灰装置每爆燃一个循环，余热锅炉排烟温度降低15－20℃，锅炉蒸汽产量增加1t/h，余热利用率提高3．4个百分点。