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解決不銹鋼薄板焊接時燒穿、變形的主要措施有哪些

來源:http://niuniury.com/  發(fā)布時間:2022-02-17 瀏覽次數(shù):0

解決不銹鋼薄板焊接時燒穿、變形的主要措施有:

The main measures to solve the burn through and deformation of stainless steel sheet during welding are as follows:
1、嚴(yán)格控制焊接接頭上的熱輸入量?選擇合適的焊接方法和工藝參數(shù)(主要有焊接電流、電弧電壓、焊接速度)。
1. Strictly control the heat input on the welded joint? Select appropriate welding methods and process parameters (mainly including welding current, arc voltage and welding speed).
2、通常對薄板焊接一般采用較小的噴嘴,但我們建議盡量采用大的噴嘴直徑,這樣使焊接時的焊縫保護(hù)面大一些,能較長時間隔絕空氣,使用壽命長。
2. Generally, small nozzles are used for thin plate welding, but we suggest to use large nozzle diameter as much as possible, so as to make the weld protection surface larger, isolate the air for a long time and have a long service life.
3、用φ1.5鈰鎢極棒,磨削的尖度要更尖,且使鎢極棒伸出噴嘴的長度應(yīng)盡量長些,這樣會使母材更快的熔化,也就是說熔化溫度上升更快,溫度會更集中,能使我們對需要熔化的位置盡可能快的熔化,且不會讓更多的母才溫度上升,這樣使材料的內(nèi)應(yīng)力發(fā)生變化的區(qū)域變小,也使材料的變形也會減少。
3. Use φ 1.5 for cerium tungsten rod, the grinding sharpness should be sharper, and the length of the tungsten rod extending out of the nozzle should be as long as possible, which will make the base metal melt faster, that is, the melting temperature rises faster and the temperature will be more concentrated, so that we can melt the position that needs to be melted as quickly as possible without raising the temperature of more base metals, In this way, the area where the internal stress of the material changes becomes smaller, and the deformation of the material will also be reduced.
4、裝配尺寸力求準(zhǔn)確,接口間隙盡量小。間隙稍大容易燒穿,或形成較大的焊瘤。
4. The assembly dimension shall be accurate and the interface clearance shall be as small as possible. If the gap is slightly larger, it is easy to burn through or form large weld bead.
5、需要采用夾具?夾緊力平衡均勻。焊接不銹鋼薄板關(guān)鍵要注意:嚴(yán)格控制焊接接頭上的線,力求在能完成焊接的前提下盡量減小熱量輸入,從而減小熱影響區(qū),避免上述缺陷的出現(xiàn)。
5. Fixture required? The clamping force is balanced and uniform. Key points for welding stainless steel sheet: strictly control the line on the welded joint, and strive to minimize the heat input on the premise of completing the welding, so as to reduce the heat affected zone and avoid the above defects.
6、選擇合理的焊接順序,對于控制焊接殘余變形尤為重要,對于對稱焊縫的結(jié)構(gòu),應(yīng)盡量采用對稱焊接;不對稱的結(jié)構(gòu),則采用先焊焊縫少的一則,后焊焊縫多的一側(cè)。使后焊的變形足以擬消前一側(cè)的變形,以使總體變形減小。
6. Selecting a reasonable welding sequence is particularly important for controlling welding residual deformation. For the structure of symmetrical weld, symmetrical welding should be used as far as possible; For asymmetric structures, the one with less welds shall be welded first, and then the side with more welds shall be welded. The deformation of post welding is enough to eliminate the deformation of the front side, so as to reduce the overall deformation.
7、不銹鋼薄板用激光焊0.1MM都可以焊接。激光光點大小任意調(diào)節(jié)?能夠很好的把控。變形比本上也是沒有的。
7. Stainless steel sheet can be welded by laser welding with a diameter of 0.1mm. Can the size of laser spot be adjusted arbitrarily? Can control well. There is no deformation ratio in this book.

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