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首頁 > 鋼管百科 > 廠家在低溫條件下是如何焊接大口徑焊接鋼管的?

廠家在低溫條件下是如何焊接大口徑焊接鋼管的?

日期:2020-03-03

在低溫條件下,低碳鋼焊接時,焊接接頭的冷卻速度,使裂紋傾向增大,特別是在第一道焊縫易開裂的重型結構中,有必要采取以下工藝步驟:

廠家在低溫條件下是如何焊接大口徑焊接鋼管的?

1) 在低溫彎曲、校正和組裝焊接件的情況下不可能。

2) 預熱時,16Mn無縫鋼管焊接工藝嚴格保持層間溫度不應低于預熱溫度。

3) 氫或超低氫焊接。

4) 應完成整個焊縫的連續焊接,以避免中斷。

5) 當定位焊增加焊接電流時,焊接速度減慢,由于增加定位焊橫截面積和長度,必要時預熱。

6) 除消光時需要填滿弧坑外,不得在基材弧槽表面上進行。

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