关键词 6063铝合金 人工时效 过渡相 力学性能 电化学性能
Effect of Artificial Aging Specification on Quality of 6063 Aluminium Alloy Profile
Li Shiping
(Guizhou Aluminium Fabrication Plant,Guiyang,550005,China)
(Guizhou Aluminium Fabrication Plant,Guiyang,550005,China)
Abstract The mechanical properties and electro-chemical properties of 6063 aluminium alloy profile are effected by the chemical compositon and artificial aging specification.The optimal artificial aging specification is at room temperature for 2 h and then at 195～250℃for 2 h,which can assure two properties and high production efficiency.
Keywords 6063 aluminium alloy；artificial aging；transition phase；mechanical properties；electro-chemical properties
Keywords 6063 aluminium alloy；artificial aging；transition phase；mechanical properties；electro-chemical properties
按GB/T3190-1996规定,6063（LD31）合金的化学成分如表1。为了兼顾力学性能和挤压性能，Mg2Si质量分数一般控制在0.7%左右。应控制w(Mg)/w(Si)=1.73。但是由于合金中存在杂质Fe,要消耗一部分Si,在生产实践中一般控制w(Mg)/w(Si)=1.1～1.3。表2是日本6063合金的化学成分（%）及合金硬度与w(Mg)/w(Si)的关系（195℃，时效2h）。
表1 6063合金化学成分 %
| 主成分 | 杂质 | 其它杂质 | Al | |||||||
| Mg | Si | Fe | Cu | Mn | Zn | Cr | Ti | 单个 | 合计 | |
| 0.45～0.9 | 0.2～0.6 | 0.35 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.05 | 0.15 | 余量 |
|
表2 日本6063合金化学成分及Mg/Si(w(Mg)/w(Si)）与型材硬度的关系 |
| 合金 | Si | Mg | Fe | Cu | Zn | Mn | Cr | Ti | Mg/Si | HV |
| A | 0.39 | 0.48 | 0.11 | 0.01 | 0.01 | 0.01 | 0.01 | 0.0047 | 1.23 | 68.9 |
| B | 0.40 | 0.53 | 0.17 | 0.01 |
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