不需清洗和直接退火，要保證線圈表面沒有油點，還要保證殘余油能完全揮發(fā)，加工窗口很窄。溫度過低，無油點，但有殘油;溫度過高，無殘油，但出油點。
　　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、采用特殊退火工藝體系的幾個階段:
　　1、 Several stages of adopting special annealing process system:
　　階段爐氣設(shè)置為180°c，升溫速率設(shè)置為35°c/h。

　　In the first stage, the furnace gas is set at 180 ° C and the heating rate is set at 35 ° C / h.
　　在第二階段，當爐膛氣體達到1800℃時，進行充氣，將爐膛含氧量控制在0.1%以下。然后保溫6h，在厭氧環(huán)境中起到預(yù)干燥作用，油脂不會因為氧化而變成油斑。
　　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.
　　在第三階段，爐氣設(shè)定為235℃，升溫速率設(shè)定為30℃/h。當線圈溫度達到230℃時，保溫時間為3小時，并對線圈材料進行回火處理，達到預(yù)期的機械性能。此時，殘油也完成揮發(fā)，但未進入油點的危險溫度范圍(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);
　　第四階段，設(shè)置爐氣為0℃，啟動側(cè)冷風機快速冷卻。當金屬溫度降到150℃以下時，它就會與空氣接觸。
　　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鋁板成品分析
　　5052 aluminum plate finished product analysis
　　1)新工藝生產(chǎn)的線圈材料表面質(zhì)量好，無油點和殘油，符合標準要求。內(nèi)部結(jié)構(gòu):顆粒小而均勻，無纖維組織。結(jié)構(gòu)的各向異性較小，彎曲不易開裂，而常規(guī)熱軋產(chǎn)品在低溫下直接下線時為各向異性較大的纖維組織，板材水平彎曲時容易開裂。嗎?
　　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)采用新工藝生產(chǎn)5052H32鋁合金板，厚度5.0mm。力學性能及彎曲試驗結(jié)果如表4所示。板子被送到終用戶那里試用，效果很好。新工藝產(chǎn)品在90°0t不開裂的情況下達到了預(yù)定的目標要求。
　　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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