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5052铝板退火工艺有哪几个阶段

来源:  发布时间:2020-05-22 10:40:33  

  不需清洗和直接退火,首先要保证线圈表面没有油点,还要保证残余油能完全挥发,加工窗口很窄。温度过低,无油点,但有残油;温度过高,无残油,但出油点。
  Without cleaning and direct annealing, it is necessary to ensure that there is no oil spot on the surface of the coil, and that the residual oil can volatilize completely, and the processing window is very narrow. If the temperature is too low, there is no oil point, but there is residual oil; if the temperature is too high, there is no residual oil, but the oil outlet point.
  一、采用特殊退火工艺体系的几个阶段:
  1、 Several stages of adopting special annealing process system:
  第一阶段炉气设置为180°c,升温速率设置为35°c/h。

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  In the first stage, the furnace gas is set at 180 ° C and the heating rate is set at 35 ° C / h.
  在第二阶段,当炉膛气体达到1800℃时,进行充气,将炉膛含氧量控制在0.1%以下。然后保温6h,在厌氧环境中起到预干燥作用,油脂不会因为氧化而变成油斑。
  In the second stage, when the furnace gas reaches 1800 ℃, the furnace gas is charged and the oxygen content in the furnace is controlled below 0.1%. Then it is kept for 6h, which plays a pre drying role in anaerobic environment, and the grease will not become oil spots due to oxidation.
  在第三阶段,炉气设定为235℃,升温速率设定为30℃/h。当线圈温度达到230℃时,保温时间为3小时,并对线圈材料进行回火处理,达到预期的机械性能。此时,残油也完成挥发,但未进入油点的危险温度范围(2450C - 4000C);
  In the third stage, the furnace gas is set to 235 ℃, and the heating rate is set to 30 ℃ / h. When the coil temperature reaches 230 ℃, the holding time is 3 hours, and the coil material is tempered to achieve the expected mechanical properties. At this time, the residual oil also volatilizes, but does not enter the dangerous temperature range of the oil point (2450c-4000c);
  第四阶段,设置炉气为0℃,启动侧冷风机快速冷却。当金属温度降到150℃以下时,它就会与空气接触。
  In the fourth stage, set the furnace gas to 0 ℃, start the side cooling fan for rapid cooling. When the metal temperature drops below 150 ℃, it will contact with air.
  5052铝板成品分析
  5052 aluminum plate finished product analysis
  1)新工艺生产的线圈材料表面质量好,无油点和残油,符合标准要求。内部结构:颗粒小而均匀,无纤维组织。结构的各向异性较小,弯曲不易开裂,而常规热轧产品在低温下直接下线时为各向异性较大的纤维组织,板材水平弯曲时容易开裂。吗?
  1) The coil material produced by the new process has good surface quality, no oil spots and residual oil, and meets the standard requirements. Internal structure: small and uniform particles, no fibrous tissue. The anisotropy of the structure is small and it is not easy to crack in bending, while the conventional hot-rolled products are anisotropic fiber structure in the lower temperature, and the plate is easy to crack in horizontal bending. Is it?
  2)采用新工艺生产5052H32铝合金板,厚度5.0mm。力学性能及弯曲试验结果如表4所示。板子被送到最终用户那里试用,效果很好。新工艺产品在90°0t不开裂的情况下达到了预定的目标要求。
  2) 5052h32 aluminum alloy plate with thickness of 5.0mm is produced by the new process. The mechanical properties and bending test results are shown in Table 4. The board was sent to the end user for trial, and the effect was very good. The new process products have reached the predetermined target requirements without cracking at 90 ° 0t.
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