臺灣博碩士論文加值系統

本研究之目的，旨在探討均質化處理條件的改變及合金添加對汽車車體
板用6000鋁合金烤漆硬化性、析出機構、及機械性質的影響。實驗中，採
用一般的6061合金（Al-1Mg-0.6Si）及其添加Mn、Cr合金的數種材料，在
三種不同熱處理製程中，利用差式掃描熱量法（DSC）、穿透式電子顯微
鏡（TEM）、金相觀察（OM）和拉伸試驗等方法來評估不同均質化條件對
機械性質的影響。 由實驗結果可知，均質化處理溫度的提高，會使添加
Mn、Cr合金中的分散粒子變大且分布稀疏。在熱處理製程1中，合金在經
過固溶處理‧淬水後，進行自然時效‧烤漆處理，發現均質化處理條件的
改變對添加元素Mn、Cr的6061合金之烤漆硬化性並無明顯影響。在熱處理
製程2中，合金在經過固溶處理‧階段淬火後，進行自然時效‧烤漆處理
，發現均質化處理溫度的提高會使添加元素Mn、Cr的6061合金之烤漆硬化
性先降後升。在熱處理製程3中，合金在經過固溶處理‧淬水‧自然時效
‧復元處理後，進行自然時效‧烤漆處理，發現均質化處理溫度的提高會
使添加元素Mn的6061合金之烤漆硬化性先降後升，而使添加元素Cr的6061
合金之烤漆硬化性逐漸上升。

The project proceeds to find out the effects of homogenization
treatment and additional elements on 6061aluminum alloy. The
influences of mechanical properties which were observed on this
alloy by means of optical micoscope(OM), transmission electron
microscope(TEM), differential scanning calorimetry(DSC) and
tensile test.From the results, the dispersoid which were found
coarsened by raising homogenization temperature. In the first
heat treatment process,which is water quench after sloution
treatment, then natural aging and baking, it had no obvious
effects on 6061 alloy and the additional Mn,Cr alloys by
altering the homogenization temperature. In the second heat
treatment process, which is step-quench after sloution
treatment, then natural aging and baking, it had no obvious
effects on 6061 alloy by altering the homogenization
temperature, but its baking hardenability decreased then creased
by creasing homogenization temperature in the additional Mn, Cr
6061 alloys. In the third heat treatment process,which is
sloution treatment, water quench, natural aging, retrogression
treatment, natural aging and then baking, it had no obvious
effects on 6061 alloy by altering the homogenization
temperature, but its baking hardenability decreased then creased
in the additional Mn 6061 alloys and creased in the additional
Cr 6061 alloys by creasing homogenization temperature.