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青岛消声器环缝焊接专机电话

更新时间:2018-05-09 16:57:44
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详细介绍

焊接接头中,焊缝金属与母材间未被电弧熔化而留下的空隙,叫未焊透。根据未焊透产生的部位可分为边 缘、层间未焊透和根部未焊透。

In welding joints, the gap between weld metal and base metal is not melted by arc, which is called incomplete penetration. The parts produced by the incomplete penetration can be divided into the edge, the lack of penetration between the layers and the incomplete penetration of the root.

夹在焊缝中的熔渣或非金属夹渣物统称为夹渣。夹渣是焊缝中常见的焊接缺陷之一,它对焊缝的危害很大 ,它减少了焊缝的有效工作面积,降低了焊缝强度,冲击韧性,并降低了焊缝的抗腐蚀能力。尤其呈尖状的夹 渣引起的应力集中几乎和裂纹相等。焊接钢铁材料是氧化物夹杂成分主要有二氧化硅,其次是氧化锰、二氧化 钛和氧化铝等,一般多以硅酸盐形式存在,这种夹杂物的危害性较大,常因在焊缝中有这类夹杂物的存在而引 起热裂纹。

The slag or non-metallic slag inclusion in the weld is collectively referred to as slag inclusion. Slag is one of the common weld defects in the weld. It has a great harm to the weld. It reduces the effective working area of the weld, reduces the strength of the weld and the impact toughness, and reduces the corrosion resistance of the weld. In particular, the stress concentration caused by sharp slag inclusions is almost the same as that of cracks. The main oxide inclusions are silica, followed by manganese oxide, titanium dioxide and alumina, usually in the form of silicate, which is more dangerous, often caused by the existence of such inclusions in the weld.

氮化物夹杂主要是铁的氮化物,它以针状分布在晶粒上贯穿晶粒的边界,会使焊缝的塑性急剧下降 。硫化物夹杂中,硫化铁的危害Zui大,它沿晶粒周界析出,并与Fe或FeO形成低熔点共晶,它是促进生产热裂纹 的重要因素之一。

Nitride inclusions are mainly nitrides of iron, which distribute on the grain along the grain boundaries by needle like shape, and the plasticity of the weld will drop sharply. In the sulfide inclusions, the harms of iron sulfide are the most harmful. It precipitates along the grain boundary and forms a low melting point eutectic with Fe or FeO. It is one of the important factors to promote the hot crack in production.

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