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濟南(nan)焊(han)接(jie)后的鍍鋅管廠家直銷

來源:http://atcasummit.com/ 日期:2019-11-04 發布人:admin

  一般情況下人們為了進一步提高運輸型鋼管的抗腐蝕能力,都會對鋼管進行加工——鍍鋅,增加這個步驟后,鍍鋅管便具有耐高腐蝕,硬度更強等特點,它在日常生活中常用來輸送氣體和熱量。今天濟南鍍鋅管廠家就給大家介紹一下鍍鋅管焊接的一些注意事項。

  In general, in order to further improve the anti-corrosion ability of the transport type steel pipe, people will process the steel pipe - galvanizing. After this step is added, the galvanized pipe has the characteristics of high corrosion resistance and stronger hardness. It is often used to transport gas and heat in daily life.
  鍍鋅鋼管分為熱鍍鋅和電鍍鋅,其中熱鍍鋅層較厚,質量較好。鍍鋅成本低,但外觀不太光滑。Galvanized steel pipe is divided into hot-dip galvanizing and electro galvanizing, in which the hot-dip galvanizing layer is thick and the quality is good. The cost of galvanizing is low, but the appearance is not very smooth. Today, Jinan galvanized pipe manufacturer will introduce some precautions for galvanized pipe welding.
濟南鍍鋅管
      鍍鋅管焊接中的注意事項。
  Precautions in welding of galvanized pipe.
  鍍鋅鋼通常在低碳鋼的外面涂上一層鋅,鍍鋅層通常為20um厚。鋅的熔點為419℃,沸點為908℃。在焊接中,鋅凝結成液體,漂浮在熔池外部或焊縫根部。
  Galvanized steel is usually coated with zinc on the outside of low carbon steel, and the galvanized layer is usually 20um thick. The melting point of zinc is 419 ℃ and the boiling point is 908 ℃。 In welding, zinc condenses into a liquid and floats outside the bath or at the root of the weld.
  鋅在鐵中有很大的固體溶解度。鋅溶液可沿晶界深度腐蝕焊縫金屬,低熔點鋅構成“液態金屬脆化”。
  Zinc has a great solid solubility in iron. The solution of zinc can corrode the weld metal along the grain boundary, and the low melting point zinc forms "liquid metal embrittlement".
  焊接前必須打磨焊縫,焊縫上的鍍鋅層必須打磨掉,否則會出現氣泡、沙眼、假焊等。將會產生。這也將使焊縫變得易碎和堅硬。
  Before welding, the weld must be polished, and the galvanized layer on the weld must be polished off, otherwise bubbles, sand holes, false welding, etc. will appear. Will be generated. This will also make the weld brittle and hard.
  焊接第一層多層焊接時,鋅層應盡可能冷凝、汽化、蒸發,從焊縫中逸出,這樣可以大大減少焊縫中殘留的液態鋅。
  When welding the first layer of multi-layer welding, the zinc layer should be condensed, vaporized and evaporated as much as possible to escape from the weld, which can greatly reduce the residual liquid zinc in the weld.
  焊接角焊縫時,鋅層應盡可能在第一層冷凝,蒸發并蒸發以從焊縫中逸出。
  When welding fillet welds, the zinc layer shall condense in the first layer as far as possible, evaporate and evaporate to escape from the weld.
濟南鍍鋅管
  方法是將焊條末端向前移動約5 ~ 7毫米,冷凝鋅層后返回原位繼續向前焊接。對于水平焊接和垂直焊接,如果選擇短熔渣電極,如J427,底切趨勢將非常小。如果采用前后送帶技術,可以獲得無缺陷的焊接質量。
  The method is to move the end of the electrode forward about 5mm to 7mm, and return to the original position after the zinc layer is condensed to continue forward welding. For horizontal and vertical welding, if the short slag electrode, such as J427, is selected, the undercut trend will be very small. If the front and back feeding technology is adopted, the welding quality without defects can be obtained.
  焊接前鍍鋅鋼的制備與普通低碳鋼相同。應注意小心處理凹槽尺寸和左側附近的鍍鋅層。
  The preparation of galvanized steel before welding is the same as that of ordinary low carbon steel. Care shall be taken to handle the dimensions of the recesses and the galvanizing near the left side.
  為了焊透,坡口尺寸應適當,一般為60 ~ 65,留出一定的間隙,一般為1.5 ~ 2.5毫米;為了減少鋅滲透到焊縫中,可以在焊接前清潔凹槽中的鍍鋅層。
  In order to achieve penetration, the groove size shall be appropriate, generally 60 ~ 65, with a certain gap, generally 1.5 ~ 2.5mm; in order to reduce the penetration of zinc into the weld, the galvanized layer in the groove can be cleaned before welding.
看完這篇文章,相信大多數人都應該對鍍鋅管的焊接有一點了解了吧,如果您想了解更多新聞資訊,歡迎訪問我們的官網:atcasummit.com。

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