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铝散热器真空钎焊

Publisher: Administrator Date:2024-02-26

与铜散热器相比,用于汽车、工程车等车辆液压油冷却的铝制热交换散热器具有散热效率高、重量低、成本低、降低汽车油耗等特点。全铝换热器采用铜散热器的特点是蛇管结构,采用液压方法组装铝管机械膨胀管和散热器,随着无腐蚀钎焊工艺的发明和环保要求的提高,为了保证换热效率,钎焊铝板翅结构散热器出现在历史时刻。

  铝散热器真空钎焊工艺的特点是工艺步骤如下:(1)将钎焊材料组装在铝散热器零件的待钎焊部位,放入真空钎焊炉,关闭炉门,抽真空;(2真空钎焊炉采用梯度连续曲线加热进行真空钎焊。在真空钎焊炉的第一阶段,以30min匀速加热至515~525°C,然后在60分钟内冷却到420~440~440°C,然后恒温保温时间小于或等于60分钟,真空钎焊炉的真空度大于10分钟‑1Pa(3)真空钎焊炉第二阶段用30min匀速升温至570~580°C,然后恒温小于等于60mi  n真空钎焊炉的真空度高于101Pa并低于102Pa(4)真空钎焊炉第三阶段以20min匀速升温至610~615°C,然后恒温保温小于等于60min,冷却冷却小于等于70min,冷却冷却的终止温度为560~580°C真空钎焊炉的真空度高于102Pa(5)真空钎焊结束后,打开炉门,取出钎焊铝散热器并进行检查。2.根据权利要求1所述的铝散热器真空钎焊工艺,其特点是真空钎焊炉加热小于最高设定温度,当真空钎焊炉超过最高设定温度时报警。


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