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镀锌方管采用镀锌技术的应用

来源:http://www.jnxxjm.com

【 发布于:2020-05-14 13:20:32 】


  镀锌钢管由于具有耐腐蚀,使用寿命长两层的优势,和相应镀锌管的价格也相对便宜,所以现在它的使用率也越来越高,但是用户不注意当焊接镀锌管,造成不必要的麻烦,所以镀锌管焊接,我们应该注意什么问题?

  Galvanized steel pipe has the advantages of corrosion resistance and long service life, and the price of corresponding galvanized pipe is relatively cheap, so its utilization rate is also getting higher and higher now, but the user does not pay attention to the unnecessary trouble when welding galvanized pipe, so what should we pay attention to when welding galvanized pipe?

济南镀锌管

  2. 镀锌钢的焊接特性

  2. Welding characteristics of galvanized steel镀锌钢通常在低碳钢上涂上一层通常为20um厚的锌。锌的熔点是419°。在焊接过程中,锌被融化成一种液体,漂浮在熔池表面或焊缝根部。锌在铁中具有较大的固溶性,锌溶液会沿晶界被吸收而加深对焊缝金属的刻蚀,低熔点组成锌;液态金属脆化。

  Galvanized steel is usually coated with a layer of zinc, usually 20 um thick, on mild steel. The melting point of zinc is 419 °. During welding, zinc is melted into a liquid, floating on the surface of the weld pool or at the root of the weld. Zinc has a large solid solubility in iron. Zinc solution will be absorbed along the grain boundary to deepen the etching of weld metal. Low melting point composition of zinc; liquid metal embrittlement.

  在谈到中美经贸问题时,商务部发言人指出,美方引发的贸易摩擦对中美企业造成了不同程度的影响。就中国企业而言,总体而言,影响是有限的,风险是可控的,主要是部分外向型企业受到不同程度的影响。和裂纹。焊缝角焊缝,特别是T形接头角焊缝容易产生裂纹渗透。在焊接镀锌钢材时,右发直缝焊管表面与锌层边缘有沟槽,在电弧热效应、氧化、熔化、蒸腾作用下,以波报白烟和蒸汽,容易造成焊缝气孔。氧化形成的ZnO熔点较高,约为1800°。在C以上,如果焊接过程中参数太小,会导致ZnO夹渣。因为锌变成了脱氧剂。出现了铁氧化镁或铁氧化镁-二氧化硅低熔点氧化物夹渣。其次,由于锌的蒸腾作用,浪花中产生大量的白烟和灰尘,对人体有刺激、破坏作用,因此,有必要将镀锌层的焊缝打磨掉。

  When talking about Sino US economic and trade issues, a spokesperson of the Ministry of Commerce pointed out that trade frictions caused by the US side had different degrees of impact on Sino US enterprises. As far as Chinese enterprises are concerned, generally speaking, the impact is limited and the risk is controllable, mainly because some export-oriented enterprises are affected to varying degrees. And cracks. The weld fillet, especially the T-joint fillet, is prone to crack penetration. When welding galvanized steel, there is a groove between the surface of right straight welded pipe and the edge of zinc layer. Under the action of arc heat effect, oxidation, melting and transpiration, white smoke and steam are reported by wave, which is easy to cause weld porosity. The melting point of ZnO formed by oxidation is about 1800 °. Above C, if the parameters are too small in the welding process, it will lead to ZnO slag inclusion. Because zinc becomes a deoxidizer. MgO or mgo-sio2 oxide slag with low melting point appeared. Secondly, due to the transpiration of zinc, a large number of white smoke and dust are produced in the spray, which can stimulate and damage the human body. Therefore, it is necessary to polish the weld of the zinc coating.

  以上是济南镀锌管公司小编为大家介绍的相关内容,想要了解更多内容,欢迎访问网站:http://www.jnxxjm.comThe above is the relevant content introduced by Jinan Galvanized Pipe Co., Ltd. for more information, please visit the website: http://www.jnxxjm.com



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