利用合适的保护气优化GMA钎焊

Optimised GMA brazing with adapted shielding gases

通过比较电弧钎焊和普通气体保护焊工艺的区别,从焊接设备、母材以及焊材等方面详细分析电弧工艺在行业生产中的优缺点,强调不同种类的气体的物理及化学特性对焊缝成形、熔深、电弧稳定性和工艺稳定性的影响。通过实际案例的对比,体现合适的焊接保护气对焊接过程的重要性。

In GMA - brazing recommended shiehting gases are argon based mixed gases with small amounts of O2 or CO2. Despite the faet that pure argon is suitable as well, adding oxidizing elements in the shielding gas will stabilize the arc, make it less sensitive to deflection, reduce the amount of porosity and improve the wetting property of the weld seam. Further improvements can be achieved with helium containing mixed gases, especially to improve gap bridging and to improve the productivity.