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The effects of the freezing rate of laser molten pool,secondary-heating affect and fusant convection in multirun overlapping on the microstructure,component and property of cladding layer were analyzed.

在球铁基体上激光熔覆铁基合金,对多道搭接时激光熔池的凝固速率、"二次加热"效应以及熔体的对流行为对搭接熔覆层组织、成分、性能的影响进行了分析。

The mathematical model of overlapping between the circumferential cutting edge and major cutting edge of the ball nose endmilling cutter with indexable inserts is established, with which the profile errors of cut surface around the overlapping point can be calculated and controllable parameters for the shape modification of circumferential cutting edge can be determined.

建立了可转位球头立铣刀周刃与端刃搭接的数学模型 ,利用该模型可计算出刀刃搭接处附近加工表面的几何形状误差并确定周刃修形的控制参数。

WT5”BZ]This paper deals with the calculating method for the effective heat utilization of laser during the broad beam overlapping,the microstructure features of overlapping cladding layer and the convection mechanism,which was used to explain the variation of the microstructure and the distribution of alloys in different areas.

研究了搭接条件下激光热有效利用率的计算方法。

These technologies include the scheme of prestress plane lapping,the deep design of transition beam,joints disposal in construction of steel pipe column prestressed beam,wavy pipe locating in prestressed stiff beam,super-long prestressed strands penetrating.

着重介绍了广州琶州跨国采购中心预应力平面搭接方案和转换梁的深化设计、施工中钢管柱与预应力梁节点处理、预应力劲性梁中波纹管定位、超长预应力穿束技术。

The essay determines the anchorage and lapping length of cold rolling torsion reinforced ber by refering to the experiments result of the structural research institute of Chinese academy of construction science research and combining it with the geometrical features and performance of cold rolling forsion reinforled ban.

通过参照中国建筑科学研究院结构研究所的试验结果，结合我省冷轧扭钢筋的几何特性及性能，给出了冷轧扭钢筋的锚固及搭接长度。

In this paper,the laser hardening technological parameters and the nigrescence technology with surface oxidation have been studied on tiny workpieces of 4Cr13 stainless steel,while the influences of the laser technology and various lapping ratios on hardness,depth and microstructures of the hardening layer have been explored.

研究了 4Cr13不锈钢细小零件激光表面强化工艺参数和材料表面氧化法发黑工艺 ,探讨了激光工艺和不同的搭接率对强化层硬度、淬硬层深度和表层组织结构的影响。

Techniques for the Measurement of Bonding Impedance at RF and Practical Applications;

射频搭接阻抗的测量方法及其应用研究

Second is the inaccurate main steel bars position of beam or plate or wrong bonding position of steel bars causing the reduce of bearing strength.

分析其原因 ,首先是钢筋锚固长度不够 ,未能伸入到支座核心区而位于保护层内 ,其锚固是不可靠的 ;再者是梁、板主筋位置不准确、钢筋搭接位置不正确 ,导致构件承载力不足发生质量事故。

In addition , the effect of the cross section shape of a conductor on its inductance is introduced qualitatively and the selective rule of a bonding conductor is pointed out.

以圆横截面导线、矩形横截面扁平导体务为对象,详细综述了导体阻抗的频率特性,及导体直流电阻与交流 电阻的关系,介绍了导体条横截面的几何形状对其电感量大小的影响,指出了搭接条尺寸的选择原则。