6061-T651
1,将铝型材装入炉内后,开始加热升温至１６０℃ 以上的某一预定温度,然后用高温风机从炉内抽气１～３次,使炉内气压相对环境大气呈负压状态,铝型材保持在环境大气压的０．８～０．９５范围内,抽气时间视炉子的容积和铝材规格的不同而由工艺实验具体确定,第一次抽气的温度为１６０～２６０℃,第二和第三次抽气的温度为２６０-３６０℃,每次抽气均为等温抽气过程,但后一次抽气的温度应比上一次抽气的温度至少高５０℃,在每次抽气之后,要换炉气,即停止抽气,让空气进入炉内,使炉内气压与环境大气平衡,并同时升温至２６０℃以上的下一次抽气的温度；
2,最后一次换气之后,将炉温升至３８０～４８０℃内保温退火,对沈阳铝型材进行机械性能调整,退火时间亦根据材料性能要求由工艺实验具体确定；
3,冷却出炉,得到最终产品。
分段负压退火除油工艺,可以对铝型材进行有效的除油,机械性能调整,保证铝型材的质量,同时提高铝型材的机械性能,提高铝型材的应用效率
茸优以下简介：
1XXX 纯铝（铝含量不小于99.00%）牌号有：1035,1040,1045,1050,1060,1065,1070,1080,1085,1090,1098,1100,1110,1135,1145,1150,1170,1175,1180,1185,1193,1199,1200,1230,1235,1260,1275,1285,1345,1350,1370,1385,1435,1445
2XXX AL-CU合金牌号有：2001,2002,2024,2003,2004,2005,2006,2007,2008,2011,2014,2017,2018,2021,2024,2A10,2A11,2A12,2A14,2A16,2025,2030,2031,2034,2036,2037,2038,2048,2091,2117,2124,2218,2219,2224,2319,2324,2419,2519,2618
3XXX AL-MN合金牌号有：3002,3003,3004,3005,3006,3007,3009,3010,3011,3012,3013,3014,3015,3016,3102,3103,3104,3105,3203,3207,3303,3307
4XXX AL-SI合金牌号有：4004,4006,4007,4008,4009,4010,4011,4013,4032,4043,4044,4045,4047,4104,4145,4343,4543,4643
5XXX AL-MG合金牌号有：5005,5006,5010,5013,5014,5016,5017,5040,5042,5043,5049,5050,5051,5052,5056,5082,5083,5086,5150,5151,5154,5182,5183,5205,5250,5251,5252,5254,5280,5283,5351,5352,5356,5357,5451,5454,5456,5457,5552,5554,5556,5557,5652,5654,5657,5754,5854
6XXX AL-MG-SI合金牌号有：6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6014,6015,6016,6017,6053,6060,6061,6063,6066,6070,6081,6082,6101,6103,6105,6106,6110,6111,6151,6162,6181,6201,6205,6253,6261,6262,6301,6351,6463,6763,6863,6951
