Dispelling Doubts | Kebei Laser Overcomes the Challenge of Welding 20mm-Thick Box Columns
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The field of intelligent processing of thick plates has always been fraught with industry challenges. As a company deeply committed to developing hybrid welding technology, Kebei Laser has also faced skepticism and doubt from within the industry:
Can a 20mm-thick box-section column really be fully penetrated and formed on both sides in a single pass without a groove?
Many believed this was an impossible feat, but we have always firmly believed that empty talk is useless; only concrete data and tangible results are the best way to dispel prejudice and earn trust.
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Industry Challenges
For a long time, to ensure full penetration at the root of thick plates, traditional box-column welding has had to rely on beveling, multi-pass welding, and even root cleaning. This process is not only cumbersome but also entails hidden costs:
High Costs: Beveling requires more welding wire to fill the groove. For large steel structure companies, this is not just a waste of time but also a waste of money.
Reliance on skilled labor: This process relies heavily on the experience of highly skilled welders; even the slightest misstep can result in defects such as lack of fusion or slag inclusion.
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As evidenced by the report
Kebei Laser’s arc-laser hybrid welding robot fundamentally revolutionizes traditional processes. It utilizes deep laser penetration, with high-power lasers melting through to the root, while simultaneously combining arc welding with wire feeding for stable bead formation—creating a synergistic effect. For 20mm-thick welds, this process achieves the following: no beveling required, single-pass penetration, and double-sided bead formation.
To verify the weld quality, we subjected the welded test specimens to rigorous ultrasonic testing and mechanical tensile testing.
In this test, we used Q355 steel plates and performed tensile tests on the welded specimens. The results showed that the tensile strength reached 595 MPa! This figure fully meets and exceeds the standard requirements for Q355 base material. This fully demonstrates that the weld not only achieved full penetration but also exhibits reliable mechanical properties, with weld strength even surpassing that of the base material. This provides a solid guarantee for the subsequent use of the components.
Earning Trust Through Technology
Let’s return to the original question: “Can a 20mm-thick box-section column be fully penetrated in a single pass without a groove?”
In the past, this was a pipe dream; today, it’s standard practice at Kebei Laser. We’re backed by cutting-edge equipment and have the confidence to back our claims with data. We firmly believe that the dignity of the manufacturing industry is not built on price competition, but on technological barriers and proven capabilities. Kobay Laser invites you to join us in bidding farewell to the era of beveling and stepping into a new era of intelligent welding!
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