焊缝

This research work has an emphasis on the transformations of the weldments microstructure by the means of the scanning electron microscope, and the transmission electron microscope, both before and after the service of the inner cover of the austenitic stainless steels under the ultrahigh temperature. Its service behavior under the ultrahigh temperature status is also analyzed. This study provides reliable information for the industrial production and a valuable reference for further theoretical investigations.

本工作侧重于研究奥氏体耐热不锈钢内罩在高温服役前后，其接头焊缝组织中发生的转变，应用扫描电子显微技术和透射电子显微技术等手段，对焊缝显微组织进行研究，分析它在超高温条件下的服役行为，为工业生产部门提供可靠的信息，为进一步的理论研究提供一点参考价值。

Hongye Machinery Factory production of machinery and equipment are widely used in metal processing production: Qi mouth edge, flat crimping, both inside and outside vertical crimping, pressure Blankholder bones, stretch forming, anti-side, crossed, metal ring inside the edge volume, Hemming, sand at the end, both inside and outside the sanding, the appearance of Belt Line, both inside and outside the skin polished, red-shaped punching, vol cylindrical, straight seam welding, weld line pressure, girth welding, pressure ring weld, sheet metal coated oil, pressure spiral teeth, cars spiral teeth.

鸿业机械厂生产的机械设备广泛用于五金制品加工生产：齐口切边、平面卷边、垂直内外卷边、压边压骨、拉形、反边、划线、金属圈卷内边、包边、砂底、内外砂光、外表砂带线、内外去皮抛光、冲形冲孔、卷圆筒、直缝焊、压直线焊缝、环缝焊、压环形焊缝、金属片涂油等、压螺旋牙、车螺旋牙。

According to the characteristic of seam tracking,the hardware part is base on the actual ability of experiment in the lab,selected appropriate image simpling equipment,designed seam tracking system.

硬件部分根据焊缝的特性，结合实验室现有实验水平，选取合适的图像采集处理设备，设计焊缝跟踪系统。

Numerical simulations of welding transient stress and residual stress with yield strength and thermal expansion coefficient mismatching between the weld metal and the parent metal have been carried out for the first time.

相同焊接温度场的有限元计算结果表明，焊缝与母材强度和线膨胀系数等匹配时，焊缝中心纵向残余应力σ〓与母材屈服强度σ〓和线膨胀系数α〓有关。

Mechanical properties of the weld metal Mechanical properties of the weld metal are not part of the classification.

焊缝金属的机械性能焊缝金属的机械性能不是分类中的一部分。

Influence of the relative width of weld metal and strength of weld metal wes researched.

研究了焊缝金属相对宽度和焊缝金属强度对接头性能的影响。

Thus, study on the formation mechanism of AF in weld metal of microalloyed steel has both theoretical and practical significance.

当焊缝金属中含有65％以上、平均尺寸约为1μm的AF时，焊缝金属具有良好的综合力学性能。

The droplet transfer of twin-wire co-pool gas shielded metal arc welding process takes great effects on the behavior of the molten pool by transferring energy, momentum and fluid flow to the molten pool which will affect the weld appearance.

双丝共熔池GMAW(twin-wire co-pool gas shielded metal arc welding， TCGMAW)熔滴过渡对焊缝成形的影响体现在对熔池的作用上，熔滴对熔池的作用在于向熔池传输能量、动量和质量，最终会影响到焊缝的成形和质量。

With considering the heat flux distribution along the direction of the work piece thickness, a modified model of 3-D conical heat source mode is put forward. Though it can be used to calculate the weld width on both the top and the bottom surfaces of the work piece exactly, but for the location and locus of the melt line in the weld cross section, the calculating precision is lower.

考虑到等离子弧热源沿厚度方向分布，本文首先提出了改进的三维锥体热源模式，可以使等离子弧焊缝正面和背面尺寸与实测结果吻合，但焊缝横断面熔合线的走向与实际有较大差别。

Experimental results of welding seam tracking testified the effectiveness and reliability of the method.

焊缝图像处理与焊缝跟踪试验结果证明了该方法的有效性和可靠性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐