6063铝合金型材挤压温升数学模型的研究  

Study on temperature rising mode of 6063 aluminium alloy during extrusion

作　　者：孟凡旺[1] 李静媛[1] 刘志铭 黄志其 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]广东佛山市三水凤铝铝业有限公司,广东佛山528133

出　　处：《轻合金加工技术》2010年第9期23-28,共6页Light Alloy Fabrication Technology

基　　金：粤港招标项目(20080103-2);广东省重大科技专项(2008A090300004)

摘　　要：通过挤压试验,采集了挤压比为92的6063铝合金型材8884A-0.8在不同挤压速度(6 mm/s、8 mm/s、10mm/s)、不同坯料温度(480℃、500℃、520℃)和不同模具温度(420℃、450℃)下的出口温度数据,并对数据进行了分析与回归。结果表明,挤压温度在挤压开始的20 mm行程内陡然升高75℃～100℃,随后趋于平稳,而在尾部50 mm范围内则略有下降;挤压速度越快则挤压温升越高,而坯料温度越高则挤压温升越小;在较高挤压速度(10 mm/s)下,模具温度越高则挤压温升越高,而在较低速度(6 mm/s、8 mm/s)下,模具温度未出现明显影响。通过实测数据回归所得挤压温升数学模型计算值与实测值相符,可用于预测8884A-0.8型材在不同挤压条件下的出口温升值。The data of extruding temperature of 6063 aluminum alloy 8884A-0.8 has been gathered,analyzed and regressed.The deformation ratio of the profile was 92.The extrusion speed were 6 mm/s,8 mm/s and 10 mm/s separately.The heating temperature of the ingot before extrusion were 480℃,500℃ and 520℃.The extrusion mold temperature were 420℃ and 450℃ separately.The analyzed results show that during the extrusion starting 20 mm the extrusion temperature rises 75℃-100℃ suddenly,then tends to go smoothly,during the finishing 50 mm the temperature goes down slightly;the higher extrusion speed the higher temperature rising;the higher stock temperature the smaller extrusion temperature rising;the higher mold temperature the higher temperature rising at the condition of higher extrusion speed（10 mm/s）.The mold temperature does not affect the temperature rising at the condition of slow extrusion speed（6 mm/s,8 mm/s）.The calculated mathematics model conforms the tested data,so it can be used to calculate the temperature rising of 884A-0.8 profile at the model exit under various extrusion process conditions.

关 键 词：6063铝合金 挤压温升 数学计算模型 

分 类 号：TG376[金属学及工艺—金属压力加工]