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对“渝-I”型铝制油冷器进行不同温度下的真空钎焊试验,利用水压检漏、氦气检漏、盐雾腐蚀、金相显微镜、扫描电镜、能谱分析等手段,研究钎焊温度对铝合金油冷器钎缝组织性能的影响。结果表明:炉膛设定钎焊温度为625℃,实际钎焊温度为605～618℃,钎焊保温时间约4min时,试件全部合格,焊缝质量较好,钎缝金相组织为初生α(Al)和α(Al)+Si共晶组织。
Vacuum brazing test at different temperatures for “Yu-I” type aluminum oil cooler is carried out by using hydraulic pressure leak detection, helium leak detection, salt spray corrosion, metallographic microscope, scanning electron microscope, energy spectrum analysis and the like Means to study the brazing temperature of the aluminum alloy oil cooler brazing microstructure and properties. The results show that when the brazing temperature is 625 ℃, the actual brazing temperature is 605 ~ 618 ℃ and the brazing holding time is about 4min, the specimens are all qualified and the weld quality is good. The brazing seam microstructure is primary α (Al) and α (Al) + Si eutectic structure.