影响弯曲件展开料尺寸计算的几个因素

实际工作中 ,常常会发现有的弯曲件经模具弯曲后的实际尺寸与预先计算的展开料尺寸有较大偏差。针对这一问题 ,从中性层弯曲半径的计算公式及中性层的位移、几种弯曲工艺方案的比较和不同弯曲模具结构的选择等方面 ,分析了造成这种偏差、影响弯曲件展开料尺寸计算准确性的几个因素     

典型装备备件消耗规律研究

目的制订合理的备件保障计划,提高备件保障工作的科学性。方法通过对某典型装备中正态寿命件和伽马寿命件修理方法的分析,依据更新过程理论以及概率论和数理统计方法,建立典型装备正态寿命件和伽马寿命件的消耗规律数学模型,并举例说明。结果通过示例,证明了建立的备件消耗规律数学模型具有较好的适用性。结论依据备件的消耗规律,可以为建制单位实现备件的精确化保障提供理论依据。     

湿式电除尘器给排水技术的研究与应用

湿式电除尘器是作为燃煤电厂大气污染治理的终端精处理设备的首选,但湿式电除尘器存在耗水量巨大、排出的灰水存在二次污染、内部件腐蚀严重等问题,严重影响了湿式电除尘器在国内燃煤电厂上的大型化应用。为此,对湿式电除尘器的喷淋给水、水质、灰水循环利用、废水排放等进行了研究分析并结合实际工程应用经验加以阐述,提出了科学合理的给水和排水方式,实现了湿式电除尘器在燃煤电厂工艺系统上的零水耗,有效解决了内部件腐蚀问题。     

Research on the recycling industry development model for typical exterior plastic components of end-of-life passenger vehicle based on the SWOT method

In-depth studies on the recycling of typical automotive exterior plastic parts are significant and beneficial for environmental protection, energy conservation, and sustainable development of China. In the current study, several methods were used to analyze the recycling industry model for typical exterior parts of passenger vehicles in China. The strengths, weaknesses, opportunities, and challenges of the current recycling industry for typical exterior parts of passenger vehicles were analyzed comprehensively based on the SWOT method. The internal factor evaluation matrix and external factor evaluation matrix were used to evaluate the internal and external factors of the recycling industry. The recycling industry was found to respond well to all the factors and it was found to face good developing opportunities. Then, the cross-link strategies analysis for the typical exterior parts of the passenger car industry of China was conducted based on the SWOT analysis strategies and established SWOT matrix. Finally, based on the aforementioned research, the recycling industry model led by automobile manufacturers was promoted.     

钢铁行业烧结烟气活性焦（炭）干法净化技术探讨

随着我国产业结构的调整,国家对钢铁行业烧结烟气污染物排放的控制力度不断加强。传统的以脱硫为主的单一污染物控制技术已经不能满足新的环境标准的要求,烧结烟气多种污染物协同处理技术的开发与应用已成为钢铁行业污染防治的必然要求。本文阐述了活性焦（炭）吸附法烧结烟气多污染物协同处理技术的工艺原理,并通过太原钢铁集团的工程应用实例证明了活性焦（炭）吸附法多污染物协同处理技术符合钢铁行业的发展需求,在我国具有广泛的应用前景。     

报废汽车内饰件再利用研究

摘要：分析了目前国内外关于报废汽车内饰件处理回收的进展情况,重点介绍了一种报废汽车内饰件回收再利用的处理方法,有效地节约资源,减少环境污染。     

装饰性塑料电镀件CASS试验问题分析

汽车用塑料电镀件是一种防护--装饰性镀层,既要具备较好的外观装饰效果,又必须具有优良的防护性能,CASS试验是其性能测试的重要项目,本文就塑料电镀件在CASS试验中出现的各种腐蚀缺陷形态进行了总结,分析了抗腐蚀性下降的原因.     

Effect of stress corrosion cracking at various strain rates on the electrochemical corrosion behavior of Mg-Zn-In-Sn alloy

This study is aimed to determine the effect of stress corrosion with low strain rates on the electrochemical properties of alloy electrode. Stress corrosion cracking tests of Mg-Zn-In-Sn alloy in 3.5 wt.% sodium chloride solutions at 25°C were performed. The effects of the electrochemical properties under the stress corrosion with low strain rates were investigated. The microstructures of cross section were observed by optical microscope. The results showed that the ultimate tensile strengths of Mg-Zn-In-Sn alloy increased and the strain decreased as the strain rates increased. Open circuit potentials (OCP) of Mg-Zn-In-Sn alloy electrode possess stability and the loop currents (LC) were improved with the increasing of stress in the elastic zone. The variation of OCP and LC did not change with the increasing of strain-rate. The microstructure of cross section observing revealed the mechanism of OCP and LC changing     

神农架林区不同类型植物的叶片特征与光合性能研究

以神农架林区木鱼镇茶山上生长的8种不同类型植物为试验材料,于晴天选择其植株上东南朝向的顶部成长叶,采用LI—COR6400便携式光合测定系统、调制叶绿素荧光成像系统（IMAGING-PAMM-Series）及双通道PAM—100测量系统（Dual-PAM-100）和常规方法研究了其叶片特征、光合性能及相互间的关系,将有助于了解神农架植物的光合生产力及其植被管理。结果表明,不同类型植物叶片的叶片特征和光合性能存在明显的物种差异。比叶重（SLW）为乔木〉灌木〉草本;气孔参数以气孔导度（Cond）差异最大;草本植物的光合能力明显高于灌木和乔木,而灌木和乔木间的差异不大;叶绿素含量（Chl）及其组分的差异较小,类胡萝卜素（Car）和花青素含量（Ant）及其与Chl的比值差异极大。不同类型植物叶片特征和光合性能指标的变异系数在7．3％～73．0％间,Chla／Chlb最小,Car／Ant最大;Chla／Chlb、基于叶温的蒸汽压亏缺（VpdL）和胞间C02浓度（Ci）dx于15％,Cond、单位鲜重Car、PSII实际量子产量和PsI非光化学能量耗散的量子产量为40％～50％,单位干重Car、Ant、Chl／Ant和Car／Ant则大于60％,其他指标在20％-40％。相关分析显示,Jpn受Cond、叶片含水量和单位干重Chl的正向调控,Ant和Car对两无决定性作用;PSII和PSI的实际量子产量依赖于ci和Chl,Car过高导致其降低;PSI的光保护受SLW的负调控及单位鲜重Chl和单位干重Car的正调控;光合机构的光损伤受Ci的负调控和Chl／Car的正调控。