当前位置：首页 > 过刊浏览->2020年41卷第10期
铸轧速率对Al-9Si-0.25Mg合金铸轧板微观组织的影响
Effect of Cast-rolling Rate on Microstructure of Al-9Si-0.25Mg Alloy Cast-rolling Sheet
浏览(1764) 下载(4)
- DOI:
- 作者:
- 包俞颉 李洋 魏伯文 徐博岳 许光明
BAO Yujie;LI Yang;WEI Bowen;XU Boyue;XU Guangming
- 作者单位:
- 东北大学材料科学与工程学院
School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
- 关键词:
- 共晶硅 铸轧速率 铸轧 晶粒细化
eutectic silicon casting-rolling rate casting-rolling grain refinement
- 摘要:
- 通过实验室立式双辊铸轧机制备板坯,研究了铸轧速度对Al-9Si-0.25Mg合金中共晶硅尺寸和形态的影响。结果表明,在较低的铸轧速度1m/min时,合金中共晶硅形态为针片状,分布相对分散,平均长径比为9.7,平均长度为3.61μm。随着铸轧速度的提高,共晶硅尺寸明显减小。当铸轧速度增加到20m/min时,针片状的共晶硅消失,共晶硅呈现为纤维状,其分布相对比较集中,且平均长径比减小到2.1,平均长度减小到0.75μm。然而,铸轧板材宏观组织中硅反偏析现象加重。The effect of casting and rolling speed on the size and shape of eutectic silicon in Al-9SI-0.25 Mg alloy was studied by using vertical two-roll casting and rolling mechanism to prepare slab in laboratory.The results show that at a low casting and rolling speed of 1 m/min,the morphology of the alloy is needle shaped,the distribution is relatively dispersed,the average aspect ratio is 9.7,and the average length is 3.61μm.With the increase of casting and rolling speed,the size of eutectic silicon decrease obviously.When the casting and rolling speed increased to 20 m/min,the needle-flake eutectic silicon disappeared,and eutectic silicon appeared as fiber,its distribution is relatively concentrated,and the average aspect ratio decrease to 2.1,and the average length decrease to 0.75 μm.However,the reverse segregation of silicon in the macrostructure of cast and rolled sheet is aggravated.