焊接

ABSTRACT Appling the numerical model and control theory to the state identification of carbon migration in dissimilar metal weldments , its law and quantitative calculation were researched. Based on analysising of metallurgical and dynamics properties of DMWs, the influences of welding procedure's factors on their high-temperature properties were studied in this dissertation. The following are the main contents.

本文将数值化建模和控制理论引入到异种钢焊接接头碳扩散迁移状态辨识，对碳的扩散迁移的规律及定量计算进行了研究，在对异种接头冶金性能和力学性能进行分析的基础上，对焊接工艺因素对接头性能的影响进行了研究，主要内容如下： 1。

This topic research initially summarized set of weldings crafts, including the preheating temperature determination, the low intensity match feasibility, the welding speed selection as well as the line energy indeed grades, these research techniques and the method may directly use in the production practice.

初步总结了一套焊接工艺，包括预热温度的确定、低强度匹配的可行性、焊接速度的选取以及线能量的确定等，这些研究方法与手段可以直接用于生产实践。

Including the arc welding, the resistance welding, the high energy welded, the rock drill welds four big kind of weldings methods and other eight special weldings method has carried on the detailed analysis.

包括电弧焊、电阻焊、高能焊、钎焊四大类焊接方法及其他八种特种焊接方法进行了详细的分析。

Including the arc welding, theresistance welding, the high energy welded, the rock drill weldsfour big kind of weldings methods and other eight special weldingsmethod has carried on the detailed analysis.

包括电弧焊、电阻焊、高能焊、钎焊四大类焊接方法及其他八种特种焊接方法进行了详细的分析。

This article has studied HG70 steel and HS-70 welding wires weldings,the welded joint,welding quality,and the welding operational performance,in restricts under the welding condition,Uses HS-70 welding wires,Experiments the steel plate the weld joint stretch,degree of hardness and the resilience test result indicated that,HG70 steel and HS-70 welding wires weld joints have the low crack sensitivity,The welding quality is good,Its weld joint has the fine mechanics performance,thus explained they had the fine welding match.

0前言非调质钢具有优良的使用性能和较低的生产成本，受到普遍重视。HG70钢是武钢开发的工程结构用钢，具有强度高、低温韧性好的特点。传统高强度钢一般碳当量较高，焊接性能较差。通过加入微量合金元素、采取新的控轧和调质工艺，使得HG70钢在提高强度的同时，亦保持了较高的韧性和较低的碳当量，因而从理论上讲HG70应具有较好的焊接性能，但HG70钢与HS-70焊丝的匹配情况，还有待于分析验证。

In fact, test welds should be executed by the welders each day that are on the job.

事实上，焊接测试应该让执行工作的焊接工每天进行。

Robotic welders, for instance, are far more consistent car to car than are human welders.

例如，机器人焊接的车比人工焊接的车一致性高得多。

Because of its ability to semi-automatic welding, to a large extent reduce the labor intensity of welders, welding improve efficiency 3-5 times.

由于具有半自动焊接能力，很大程度降低焊工的劳动强度，提高焊接效率3至5倍。

the intake tower is located in the traffic bridge on the left bank power station gongboxia imports spillway tunnel, bridges with a rib plate for the t-beam, long 20m, bridge steel welded joints has become one of the difficulties of the installation: space narrow, steel-intensive, welding operation difficulties.

进水塔交通桥位于公伯峡电站左岸泄洪洞进口，桥梁为带有肋板的t型梁，长20m，桥梁钢筋接头的焊接成为安装的难点之一：空间狭窄、钢筋密集、焊接操作困难。

Welding arc is melting their contact point, a V grooved ceramic block or perpendicular pair of rectangular blocks can be fixtured to provide support.

为了减少焊接电弧熔化结点而造成的对接难度，建议安装一个V形陶瓷块或一对垂直的矩形块来协助焊接。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！