焊接专业英语翻译（非诚勿扰）2

Of course, there are exceptions, such as laser welding of aluminum alloy materials. As the welding process, the evaporation of low melting point composition changes lead to weld components. At the same time, as a result of laser welding is very rapid heating and cooling, so that liquid metal could not fully filled cavity formed in the weld porosity or cracks. All of this is to have an adverse effect on joint strength. Therefore, the actual welding should be taken in appropriate filling materials and to improve the conditions of laser irradiation to be prevented. Laser welding seam on the issue of toughness, yet the lack of adequate research data. Is generally believed that the addition of fill material laser welding with low heat input than arc welding, and did not become as a result of the adjustment of high-carbon steel plate weld hardening tendency of the obvious targets to reduce the toughness. Moreover, despite the added fill material for the use of conventional low-carbon stee