6082铝合金近终形铸锭质量研究  

Study of Quality of Near-Net Shape Ingot of 6082 Alloy

作　　者：郭世杰[1] 刘金炎[1] 马科[1] 长海博文 

机构地区：[1]苏州有色金属研究院有限公司,江苏苏州215026

出　　处：《有色金属加工》2016年第1期27-32,46,共7页Nonferrous Metals Processing

摘　　要：研究了6082铝合金近终形铸锭质量变化。结果表明,当铸造温度为720℃,铸造速度为100mm/min,冷却水压为0.02MPa时,近终形铸锭重心位置的冷却速率为3.7℃/s,平均晶粒度为142μm,铸锭角部位置的冷却速率为7.2℃/s,平均晶粒度为119μm。在50mm/min至140mm/min变化范围内,随着铸造速度的增加,近终形铸锭偏析层和缺陷层厚度逐渐减小,晶粒逐渐细化;但当铸造速度增加至140mm/min时,晶粒细化效果不再显著。The paper studied quality changes in near- net shape ingot of 6082 alloy. The results showed that the cooling rate and average grain size were 3.7℃ / s and 142μm respectively at the centre of gravity of the ingot comparing with 7.2℃ / s and 119μm at the corner of the ingot when casting was carried out with temperature of 72℃,speed of 100 mm / min and cooling water pressure of 0.02 MPa. Within the range of 50~140 mm / min,segregation and defect layers got thinner and grain structure was refined gradually with the increase of casting speed; when casting speed increased to 140 mm / min,grain refinement was not obvious.

关 键 词：6082铝合金 近终形铸锭 晶粒度 

分 类 号：TG146.21[一般工业技术—材料科学与工程]