焊缝金属

The steel structure of plamsholding dagoba for Famen Temple is constructed with steel Q345GTC. The construction period is necessity through the winter, even from ovember of 2007 to February of 2008. Negative temperature of environment exerts direct influence to welding quality. If the droping speed of temperature is quick, the metal will be brittle, also, the possibility of crack produced at weld is increased.

摘要］ 法门寺合十舍利塔钢骨结构工程钢骨采用Q345GJC钢，施工经过冬季阶段（2007年11月～2008年2月），由于冬季施工的负温环境会使焊接质量受到直接影响，降温速度加快使焊缝金属脆化，增加裂纹产生的可能性，控制不好会造成焊接质量的下降甚至造成安全隐患。

According to the chemical metallurgy principle of self-shielded weld and the analysis on the deoxidization and nitrogen fixation of the metal such as aluminium, titanium,and etc.

根据自保护焊接化学冶金原理，分析了铝、钛等金属对脱氧和固氮的作用，研究了适合自保护焊接合理的焊缝金属化学成

Both slag and scale can be found as elongated or globular inclusions in base or weld metal.

焊渣和鳞片在母体金属或焊缝金属中都能以伸长的或球状的内含物形式存在。

The higher the rotating speed is, the stronger the effect of electromagnetic stirring on the liquid is, and the smaller the grains of the welded metal are, the more homogeny of eutectic structure of Al- l2Si alloy is.

磁场的旋转速率越高，对液态的电磁搅拌作用越强，焊缝金属的晶粒越细小、Al-12Si合金共晶组织越均匀。

The result of abrasion test and welding tests show, the crafts of adopting parted type structure to make tamping pick is viable theoretically, the pickax boot wearable material we have selected havent appear brittleness desquamation under the condition of test, and the ratio of performance and price of the material is higher; The welding joint has no obvious welding bug under the condition of test, the break mode of welding slot metal is mainly toughness break, and the craft performance of the weld material we have selected is all right, the welding craft we have established is suitable to the occasion and feasible.

磨损试验和焊接试验结果表明，采用分式体结构制造捣镐这一工艺理论上是可行的，所选镐靴耐磨材料在试验条件下未见脆性剥落，而且性价比较高；焊接接头在试验条件下没有明显的焊接缺陷，焊缝金属断裂方式主要是韧性断裂，而且所选焊接材料工艺性能良好，所制定焊接工艺切实可行。

In this paper, the thermodynamics driving forces of AF transformation were calculated in theory using the models of KRC and regular solution for the first time.

本文利用KRC模型和规则溶液模型首次对焊缝金属中AF转变的热力学驱动力进行了理论计算。

In this paper, the law of change of nitrogen content in the metal of welding seam under different forms of shielded flow is studied by means of Laser shadowgraph flow field showing equipment and the gas pulse-chromatography.

本文采用激光阴影法流场显示装置和脉冲—色谱气相分析仪，研究了不同气流形态下焊缝金属中含氮量的变化规律。

The transformation conditions and natures of acicular ferrite in the weld metal of microalloy steel s were analyzed systematically.

系统地分析了微合金钢焊缝金属中针状铁素体组织的形成条件及特点，对夹杂物粒径、数量进行了统计分析，并阐述了针状铁素体的形核位置。

gas shielded arc welding ; gas in weld metal ; CO_2; welding current ; mathematical model

有人曾对Ar -CO2 混合气体保护下焊缝金属中的气体含量与被焊金属和焊接参

Porosity can occur anywhere in the weld metal or the base metal.

气孔能在焊缝金属或母体金属中的任何地方产生。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！