https://qinwei.fun/en/series/laser-welding/Recent content in Laser Welding on 乘物游心录 · Technical NotesHugo -- gohugo.ioenSun, 26 Jul 2026 00:00:00 +0800https://qinwei.fun/en/posts/ultrafast-laser-welding-transparent-materials/Tue, 17 Jun 2025 07:25:00 +0800https://qinwei.fun/en/posts/ultrafast-laser-welding-transparent-materials/<blockquote class="c-article-lead"> Ultrafast laser welding can join transparent materials to one another or to metals without adhesives or filler. This article explains the governing mechanisms, the main reliability bottlenecks, and the spatiotemporal beam-control strategies used to widen the process window. </blockquote> <p><span class="c-article-tag">High-rate heat accumulation</span> <span class="c-article-tag">Transparent-to-metal welding</span> <span class="c-article-tag">Burst mode</span> <span class="c-article-tag">Bessel beams</span> </p>https://qinwei.fun/en/posts/aluminum-laser-arc-hybrid-welding/Mon, 12 May 2025 22:12:00 +0800https://qinwei.fun/en/posts/aluminum-laser-arc-hybrid-welding/<blockquote class="c-article-lead"> Aluminum welding is governed by a difficult combination of high thermal conductivity, a refractory oxide film, low room-temperature absorptance, hydrogen sensitivity, and alloy-dependent softening. This article connects those material properties to laser beam welding, laser–arc hybrid welding, cracking, porosity, weld shape, and mechanical performance. </blockquote> <p><span class="c-article-tag">Aluminum alloys</span> <span class="c-article-tag">Laser beam welding</span> <span class="c-article-tag">Laser–arc hybrid welding</span> <span class="c-article-tag">Defects and properties</span> </p>https://qinwei.fun/en/posts/dual-mode-tab-busbar-laser-welding/Mon, 03 Mar 2025 21:09:00 +0800https://qinwei.fun/en/posts/dual-mode-tab-busbar-laser-welding/<blockquote class="c-article-lead"> Battery tab-to-busbar welding must deliver more than mechanical attachment. A production joint has to combine adequate strength with low electrical resistance, limited temperature rise, and controlled intermetallic formation—especially when aluminum and copper are joined. A dual-beam laser separates penetration from thermal-field control by combining an intense core with a broader ring. </blockquote> <p><span class="c-article-tag">EV batteries</span> <span class="c-article-tag">Tab-to-busbar joints</span> <span class="c-article-tag">Core-ring laser</span> <span class="c-article-tag">Al–Cu dissimilar joining</span> </p>https://qinwei.fun/en/posts/al6013-laser-welding-crack-suppression/Fri, 28 Feb 2025 22:40:00 +0800https://qinwei.fun/en/posts/al6013-laser-welding-crack-suppression/<blockquote class="c-article-lead"> Cracking in laser-welded 6013 aluminum connects three levels of control: how the beam distributes energy, how the melt pool circulates, and how the solidification front changes from columnar to equiaxed growth. By combining Gaussian, core-ring, and annular profiles with different oscillation frequencies, the study reduced single-track crack occurrence from 80% to 0%—while also showing that a higher frequency is not automatically better. </blockquote> <p><span class="c-article-tag">Al6013</span> <span class="c-article-tag">Beam shaping</span> <span class="c-article-tag">Melt-pool oscillation</span> <span class="c-article-tag">Columnar-to-equiaxed transition</span> </p>https://qinwei.fun/en/posts/laser-welding-ev-battery/Sun, 05 Jan 2025 12:54:00 +0800https://qinwei.fun/en/posts/laser-welding-ev-battery/<blockquote class="c-article-lead"> A weld inside a traction battery must carry high current while surviving vibration, thermal cycling, sealing loads, and long service. Starting from cell architecture, this article examines tab-to-busbar and enclosure joints and the control of Al–steel, Cu–Al, and Cu–steel dissimilar combinations. </blockquote> <p><span class="c-article-tag">Traction batteries</span> <span class="c-article-tag">Dissimilar materials</span> <span class="c-article-tag">Tabs and busbars</span> <span class="c-article-tag">Battery enclosures</span> </p>