螺纹钢筋的切分轧制

以首钢小型厂为例，较详细地介绍了用切分轧制工艺生产小型螺纹钢筋时，孔型系统、导卫装置的构成，结构设计要求，有关工艺参数及调整和控制技术。     

短纤维增强复合材料的仿生模型──Ⅰ 哑铃状短纤维增强复合材料的应力分析

受生物体构件的启发，提出了哑铃状短纤维增强复合材料的模型．分析了带球短纤维和基体中的应力分布，发现端头半径粗化将改善纤维中轴向应力分布，使之趋于均匀化，同时可减少纤维端部界面的剪应力．研究表明纤维长径比对纤维端头应力影响较小．讨论了纤维－基体模量比对纤维轴向最大拉伸应力和界面最大剪应力的影响．     

运用复合剂制备WC颗粒增强钢基表面复合材料

以ZG310-570为基体、WC颗粒为增强相,在普通水玻璃石英砂干型、无负压条件下,运用自制的复合剂,制备出WC颗粒增强钢基表面复合材料.抗磨料磨损性能是含20%Cr高铬铸铁的3.30倍.硬度可达60HRC以上.铸件表面平整光洁,尺寸精度大为提高.合金层厚度均匀,可达8mm,且与基体之间结合良好.     

Influence of diurnal and seasonal temperature variations on the detection of corrosion in reinforced concrete by acoustic emission

Chloride rich reinforced concrete prisms were coupled to chloride-free prisms and exposed to diurnal and seasonal temperature cycles typical of those found in the UK. Acoustic emissions (AE) and galvanic currents were continuously monitored and correlated with ambient temperature. AE and galvanic currents were found to emulate the evolution of temperature in the diurnal cycles, although no specific relationship between AE and galvanic current could be obtained. The influence of seasonal variations in galvanic current had no obvious influence on AE Energy per second over the range of corrosion rates studied. The findings suggest that AE is more sensitive to short term (diurnal) changes in corrosion rates than the longer (seasonal) effects. It was hypothesised that this is due to transitory changes in the internal microclimate of the concrete.     

脉冲电场作用下SiCp/2014颗粒增强铝基复合材料的制备

介绍了一种新的制备颗粒增强铝基复合材料的方法，对处于熔点以上的铝液及SiCp颗粒施加一定时间的电脉冲，观察其凝固组织，发现增强颗粒分布均匀，基体合金晶粒细小，致密度正常，强度，耐磨性较高，该 方法是一种简单易行的制备颗粒增强铝基复合材料的新方法。     

加标Gr400W可焊钢筋的研制开发与生产

为参与国际市场竞争 ,济钢对加标Gr40 0W钢筋进行了开发。通过对该钢筋的质量特性分析 ,制定了加标钢筋的化学成分、孔型设计方案和生产工艺。生产实践证明 ,该产品开发获得成功 ,产品质量达到标准要求     

酸性气氛下钢筋混凝土结构腐蚀行为及其机理

对工业酸性气氛环境下经过10年使用的工厂钢筋混凝土采样,用EDS、XRD和SEM,以及力学性能测试等手段观测了钢筋的腐蚀产物成分和基体成分、混凝土的主要化学组成、微观形貌结构及钢筋的力学性能;另外,还定量分析了钢筋混凝土所处的大气环境中主要腐蚀性气体的含量进行了定量分析.结果表明,含S的酸性气体在箍筋表面的吸附与沉积是钢筋混凝土遭受破坏的主要原因,钢筋腐蚀的发生与C l-诱发的点蚀不同;大量酸性含S及CO2的气体导致混凝土的水泥水化产物和其微观结构发生了变化,特别是含S气体的存在对钢筋混凝土的中性化起重要作用.     

颗粒增强钢铁基表面复合材料铸渗技术的研究与发展

从材料的选择、铸渗工艺、及铸渗应用等方面,介绍了国内外运用铸渗法制备钢铁基表面复合材料的新进展.分析了复合材料中增强相和基体间的相互作用和界面问题.提出了今后研究工作中值得重视的几个问题.     

TiB2/Cu复合材料用于电火花加工电极的可行性探讨

从分析电火花加工对电极材料的基本要求入手，结合TiB2／Cu复合材料在目前制备工艺条件下所获得的电学、力学性能等特性，采用对比研究的方法，探讨将其作为电火花加工电极材料的可行性。     

Resistance welding of carbon fibre reinforced polyetheretherketone composites using metal mesh and PEI film

Weldability of polyetheretherketone( PEEK) with polyetherimide( PEI) is tested. And carbon fiber reinforced PEEK laminates are resistance welded using stainless steel mesh heating element. The effects of the welding time and welding pressure on the lap shear strength of joints are investigated. Results show that PEEK can heal with PEI well in welding condition and the lap shear strength of PEEK/CF(carbon fibre) joint increases linearly with welding time, but reaches a maximum value when welding pressure ranging from 0.3 MPa to 0.5 MPa with constant welding time. The fracture characteristics of surface are analyzed by SEM techniques, and four types of fracture modes of lap shear joints are suggested.