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某厂炼铜用的冷却水装置,外套是用紫铜管与不锈钢管对接焊制成的。要求焊后长期使用焊口不脱落,通水进行压力试验时(水压为0.15MPa)不渗漏。过去采用银、铜钎料钎焊,但钎焊接头强度低,使用寿命短。我们采用手工钨极氩弧焊试焊效果良好,解决了该厂的实际问题。 1.焊前准备 冷却水装置外套的结构尺寸如图1所示,为确保构件焊后同心,焊缝背面无焊漏,设计了定位芯棒,它与焊件的装配情况见图2。芯棒由H62黄铜制造,用于承托焊缝并起散热作用。芯棒外壁应贴紧接管内壁,其端头钻有通孔,以便焊后从焊件中取出。
Copper plant with a cooling water device, the jacket is made of copper and stainless steel butt welded. Requires long-term use after welding seam does not fall off, water pressure test (water pressure 0.15MPa) does not leak. In the past with silver, copper brazing filler metal, but the braze joint strength is low, short service life. We use the manual TIG welding test results are good, to solve the practical problems of the plant. 1. Prepare the cooling water jacket before welding structure size shown in Figure 1, in order to ensure that the components after welding concentric, weld back without welding, design mandrel positioning, and welding parts assembly shown in Figure 2. Mandrel made of H62 brass, used to support the weld and play a cooling effect. Mandrel wall should be close to take over the inner wall, the end of the drill hole, so that after welding from the weld removed.