焊缝

All pressure part welding on inner vessel not otherwise fully radiographed shall have root and cover passes subjected to magnetic particle inspection.

不另行说明的所有内部受压件焊缝（不包括夹套，但包括盘管，此处应为COIL），根部焊缝进行RT，盖面焊缝进行MT检测。

Aiming at the toughness fluctuation of the high grade thick plate pipeline steel submerged arc welding.SEM and energy spectrum analysis had been used to analyze weld microstructure, appearance of impact fracture,composition segregation,weld inclusions,welding wire purity,etc..

针对这种高钢级厚板管线钢埋弧焊接条件下出现的焊缝韧性波动，采用SEM、能谱分析等对焊缝微观组织、冲击断口形貌、成分偏析、焊缝夹杂物、焊丝纯净度等进行了分析。

Departures between welding arc and the centre of weld and their directions and measure are recognized from the images of the tracking weld.

根据这一结果，调整电弧与焊缝中心的相对位置，消除电弧与焊缝的偏离，达到焊接电弧准确跟踪焊缝的目的。

First, the mismatching factors of submerged arc welding and shielded metal arc welding of S355ML steel (65mm thickness) were determined with "direct measurement method". Then, the butt welds of SAW and SMAW were made to full thickness fracture toughness specimens and the fracture toughness in welds centre were measured by CTOD test.

用&直接测量法&确定了低合金高强钢S355ML钢板（厚65mm）自动埋弧焊和手工电弧焊的焊缝强度匹配系数，同时将这两项焊接工艺的对接焊缝制成全厚度断裂韧度试样，运用裂纹尖端张开位移试验方法测定其焊缝中心的断裂韧度。

The results show that laser-arc welding can achieve full penetration by single-path butt jointing through appropriate parameters; Y shape groove with 8 mm truncated edge can enhance the penetration ability of laser-arc hybrid welding. Low welding speed is good for penetration, however the limitation still exists for hick plates joint. Gap is significant factor of penetration when work pieces is large thickness. The hardness of thick plates joint shows that there is big difference in mold of vertical thermal cycle using laser-arc hybrid welding.

结果表明：通过激光功率等焊接规范匹配，激光-电弧复合焊接能实现20 mm厚板的全熔透单道对接；钝边为8 mm的Y形坡口有助于提高厚板激光-电弧复合焊缝熔透能力；降低焊接速度有利于提高熔深能力；工件厚度较大时，装配间隙对焊缝熔深能力的影响较为显著；接头硬度表明厚板激光复合焊焊缝纵向热循环模式存在较大差异。

The use of thin seam annealing furnace hoop-shaped composite structure, in large containers, weld any combination, dismantling, and transportation convenience, temperature uniformity, excellent insulation effect, heat losses small, can really achieve the elimination of welding seam annealing stress effect.

该焊缝退火炉采用薄箍形组合结构，可在大型容器的焊缝处任意组合，拆卸、运输方便，温度均匀，保温效果极佳，热损失小，真正能够达到焊缝退火消除焊接应力的效果。

The results show that the main cause of the angular distortion of the lap joint is the non-uniform distributed inherent shear strain component that is vertical to the weld line and exists in the plane paralleling to the weld line.

结果表明：搭接接头焊接角变形的产生主要是由焊缝及其附近区域与焊缝平行的平面内垂直于焊缝方向上不均匀分布的固有剪切应变分量引起的。

The process is described as follow: firstly, definition of welding line by alternately man-computer, including welding line geometry information and technical parameters, Secondly, welding line was scattered a series of welding point; Thirdly, visiting the elements of entity such as face, edge etc.

在规划中，首先通过交互手段定义并获取焊缝，包括焊缝的几何信息和工艺参数。然后，对焊缝离散化处理，得到一系列焊接路径点。

The welding deformation and residual stress are decreased evidently.The dimensional stability and service security of the welding structure are increased obviously.The impact absorbing energy of weld is improved by 21% under vibratory weld conditioning. And the effect of mechanical vibration on the impact absorbing energy of weld is greater than that of HAZHAZ are refined distinctly. The fusion area and overheated zone are narrowed. And the dimension of Widmanstaten structure minishes or disappeares.

试验结果表明：振动焊接后，焊接变形和残余应力明显降低，焊接结构尺寸稳定性和使用安全性大大提高，振动焊接后焊缝试样的冲击吸收功平均值比常规焊接下冲击吸收功的平均值提高了21%，且振动焊接对焊缝冲击性能的影响要明显大于对热影响区冲击性能的影响；振动焊接使得焊缝和热影响区的组织明显细化，熔合区和过热区变窄，魏氏组织减小或消失。

The influence of heat input on microstructure and properties of weld metal and inclusions in weld metal were also studied in depth.

本文对微合金钢焊缝金属中AF组织的相变动力学和相变热力学进行了系统的研究，同时对热输入对焊缝金属组织及性能的影响和焊缝金属中的夹杂物也进行了深入的研究。

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