澳洲阿德莱德代写assignment:环境保护的温度和压力
ASSIGNMENT代写

澳洲阿德莱德代写assignment:环境保护的温度和压力

2018-04-13 20:55

技术的进步推动了石油、化学、纸浆和环境保护的温度和压力。工业,并增加了在过程压力容器中严重腐蚀和磨损的可能性。工业必须提高这些主要重要部件的腐蚀和磨损性能。作为一个规则,经济特性不允许制造固体高合金化材料的部件。因此,对高合金镀层的非合金或低合金基材进行表面处理是至关重要的。电焊(SAW)和电渣焊(ESW)工艺适用于在大表面积上用带状电极进行焊接沉积,这两种工艺都采用颗粒状焊剂。条状电极,连续不断地,被液化并融合到基体上。与其他工艺相比,尽管使用了相同的设备,但由于使用了广泛的条带,因此它非常有效,因为它在内部获得了磁流效应,从而使磁性转向装置得到了锻炼。焊接后,对缺陷无损检测进行了分析。电渣带包覆层是一种提高埋弧带熔覆层的技术,它已迅速成为一种可靠的高沉积速率程序。采用焦耳效应将条状材料液化是一种无弧技术。加热是电流流过带状电极的结果,是一层相对较浅的液体电导率熔渣,如图1所示。由于熔渣池是用来将条带和一些焊剂材料液化,而不是在条状电极和焊剂材料之间的电弧,因此ESW的渗透率比锯的要小。根据经验,电渣带堆焊的稀释度降低了50%,相比之下,在相同的热输入下,镀层的沉降率明显提高。然而,由于ESW的稀释程度较低,因此为ESW建立了新的条状结构,特别是用于在一层中获得某种焊缝金属化学(如304L, 316L)的应用。
澳洲阿德莱德代写assignment:环境保护的温度和压力
Technological advancements have driven up temperature and pressure serviced in the petroleum, chemical, pulp, and environmental protection. Industries, and increased the possibility of severe corrosion and wear in process pressure vessels. The industries must upgrade the corrosion and wear performance of these main important parts .Economic features as a rule will not allow fabricating components from solid high alloyed materials. As a result it is essential to surface non-alloyed or low alloy base materials with high-alloy cladding. The submerged arc welding(SAW) and electroslag welding (ESW) process are appropriate for applying welded deposits over large surface areas by means of strip electrodes .Both processes are using a granular flux material. A strip electrode, fed continuously, is liquefied and fused to the substrate. In contrast with other processes it is very effective in spite of the same equipments used but due to the wide strip used it procures a magnetic flow effect within to rectify it a magnetic steering device is exercised. After the welding to examine the defects NDT's are carried upon it. Electro slag strip cladding is an advancement of submerged arc strip cladding, which has speedily established itself as a reliable high deposition rate procedure. ESW is an arc less technique using Joules Effect to liquefy the strip material. The heating is an outcome of current flowing through the strip electrode and a relatively shallow layer of liquid electro conductive slag as shown in figure 1. The penetration is lesser for ESW than for SAW since the molten slag pool is used to liquefy the strip and some of the flux material rather than as an arc between the strip electrode and the flux material. As a rule of thumb, electro slag strip surfacing decreases dilution by up to 50% in contrast with submerged arc strip surfacing for the same heat input with a significantly higher deposition rate. However, as a consequence of the lower dilution levels for ESW, new strip compositions have been built for ESW, in particular for applications where the purpose is to obtain a certain weld metal chemistry (such as 304L, 316L) in one layer.