ZG3Cr18Ni25Si2耐热钢熔炼工艺的改进

介绍了改进后的ZG3Cr18Ni25Si2耐热钢熔炼工艺及特点，它具有较高的合金元素收得率，铸件的使用寿命比改进前延长了35％－45％。     

焊缝X射线照相中以透照距离为参变量的管电压计算方法

针对钛、钢焊缝X射线照相探伤中,要通过实验来确定管电压值,存在低效、浪费的问题,作者总结大量探伤工作中的数据,找出了对于不同透照方式和不同透照条件下,管电压值与试样厚度和透照距离之间的关系,建立了计算管电压值的经验公式,并对计算值与实验值作了对比分析,证实经验公式简便可靠。文中给出了适用于国内广泛采用的几种X光探伤机和通用的几种感光胶片的管电压计算公式及有关数据,可供钛、钢X光探伤工作者参考应用。     

我国不锈钢的基本情况以及与国外的差距

阐述了我国不锈钢品种、质量、产量和工业装备等方面的基本情况，并分析了与先进工业国家间的差距，对加快我国不锈钢发展提出了建议。     

矿山磨光球用钢XK5159H的生产试制

XK5159H钢连铸连轧棒材用于制造矿山磨光球，对于钢的纯净度、低倍组织、探伤结果及DI值等均有严格的要求，很难控制。我们通过制定内控化学成分及合理的工艺路线，使生产试制一次成功。     

UOE焊管翻板机的研制

介绍了自行设计的翻板机在UOE焊管生产线上的应用及效果,简述了该设备的工作机理、设备组成、主要技术参数及主要机构设计。实际应用表明,该翻板机在翻板过程中无冲击和噪音,运行平稳可靠,操作方便,可有效防止外观不合格钢板投入焊管生产。     

确定电磁超声换能器钢管检测最佳磁化强度的试验研究

由于电磁超声换能器检测钢管缺陷时,其磁场强度影响超声波幅值,进而影响检测灵敏度。为此设计了确定最佳磁化强度的试验方案,通过试验得到超声波幅值随电磁场激励电流的变化曲线。确定了最佳磁化强度时的激励电流。     

混凝土结构的耐久性措施

在分析混凝土结构的腐蚀机理的基础上综述了目前对混凝土及其中钢筋的各种防护措施。     

水泥基复合材料微结构破坏声发射研究

研究不同组分的水泥基复合材料在三点弯曲负荷下,材料内部微结构破坏的声发射特性。结果表明,在加载初期声发射事件发展较为缓慢,且出现的主要是一些低振幅的声发射信号;而在峰值载荷附近,声发射事件数快速增长且开始有大量高振幅声发射信号出现。循环荷载作用下,粗集料水泥砂浆声发射呈现Felicit效应,而结构密实的活性粉末混凝土呈现Kaiser效应。     

钢丸增强ZA27复合材料的制备与摩擦磨损特性

采用搅溶加压铸造研制了钢丸增强ＺＡ２７复合材料（ＺＳＣ），复合工艺简便，ＺＳＣ组织致密，钢丸与基体呈冶金结合，切削加工性能良好；在干摩擦和油润条件下，ＺＳＣ的耐磨性随钢丸量的增加而增加，并优于相同试验条件下的ＺＡ２７合金；干摩擦下ＺＳＣ具有自润滑能力和良好的耐磨减摩性能，油润下随滑动速度和载荷的增大其耐磨性较ＺＡ２７更具优势。     

Characterizing steel tube for hydroforming applications

With the increased use of tubular steel products, especially for hydroforming applications, it is important to be able to predict the performance of tube from sheet tensile tests. In the present study, two aluminum killed draw quality (AKDQ) steels and one high strength low alloy (HSLA) steel were evaluated. Tensile properties and plastic strain ratios were measured on sheet material in the longitudinal and transverse directions. Axial tensile tests were performed on material extracted from production tubes. Material from quasi tubes, which are strip material bent to the same curvature as the tubes but not welded or sized, was also tested. Residual stresses in the production and quasi tube were determined by displacement methods. A hydraulic burst test was performed on the production tubes to simulate a hydroforming operation. Effective strains resulting from tubemaking are calculated for two discrete operations: bending and sizing. For the production tubes, a linear relationship was found between a load factor (strength times thickness) and effective sizing strain. The relationship between load factor and residual stress was also linear. Predictions of the maximum pressure and the strain at instability during a hydraulic burst test are shown to compare favorably with experimental values, based on flat sheet properties and tubemaking strains. The prediction of the yield strength in the tube based on flat sheet properties is shown to be fairly accurate when the effective sizing strain is small compared to the effective bending strain.