中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2011年
6期
1218-1224
,共7页
关键词:铝合金%慢应变速率拉伸实验%电化学%固溶强化%热处理%力学性能
關鍵詞:鋁閤金%慢應變速率拉伸實驗%電化學%固溶彊化%熱處理%力學性能
관건사:려합금%만응변속솔랍신실험%전화학%고용강화%열처리%역학성능
Al alloy%slow strain rate test%electrochemistry%precipitation strengthening heat treatment%mechanical property
Al合金表层的缺陷常常会导致腐蚀发生.因此,采取保护措施以提高铝合金的抗腐蚀性能是非常重要的.从电化学的角度出发,对固溶、淬火和时效处理工艺进行优化,以提高铝合金的强度.在不同电位(-05～ -1.8V)下进行慢应变速率拉伸实验.结果表明:与未经强化处理的铝合金相比,经固溶强化热处理的铝合金表现出高的最大拉伸强度、伸长率和断裂时间.由于经固溶强化处理的铝合金的伸长率增加,其拉伸断裂时间也随之增加.在电位-1.3～-0.7V范围内,样品具有优异的力学性能,因此,该电位范围被认为是该合金的腐蚀保护范围.
Al閤金錶層的缺陷常常會導緻腐蝕髮生.因此,採取保護措施以提高鋁閤金的抗腐蝕性能是非常重要的.從電化學的角度齣髮,對固溶、淬火和時效處理工藝進行優化,以提高鋁閤金的彊度.在不同電位(-05～ -1.8V)下進行慢應變速率拉伸實驗.結果錶明:與未經彊化處理的鋁閤金相比,經固溶彊化熱處理的鋁閤金錶現齣高的最大拉伸彊度、伸長率和斷裂時間.由于經固溶彊化處理的鋁閤金的伸長率增加,其拉伸斷裂時間也隨之增加.在電位-1.3～-0.7V範圍內,樣品具有優異的力學性能,因此,該電位範圍被認為是該閤金的腐蝕保護範圍.
Al합금표층적결함상상회도치부식발생.인차,채취보호조시이제고려합금적항부식성능시비상중요적.종전화학적각도출발,대고용、쉬화화시효처리공예진행우화,이제고려합금적강도.재불동전위(-05～ -1.8V)하진행만응변속솔랍신실험.결과표명:여미경강화처리적려합금상비,경고용강화열처리적려합금표현출고적최대랍신강도、신장솔화단렬시간.유우경고용강화처리적려합금적신장솔증가,기랍신단렬시간야수지증가.재전위-1.3～-0.7V범위내,양품구유우이적역학성능,인차,해전위범위피인위시해합금적부식보호범위.
The corrosions resulting from defects in painting layers frequently occur in Al alloys,so the application of corrosion preventing systems is also very important.Optimum conditions in terms of electrochemistry in relation to solution treatment,quenching and artificial aging treatment were established in order to optimize precipitation strengthening conditions intended to enhance the strength of Al alloys.Slow strain rate tests (SSRT) at various applied potentials were conducted in potential range from -1.8 to -0.5 V.The results show that the maximum tensile strengths,elongations and time-to-fracture are shown to be high values.After precipitation strengthening heat treatment,a tendency appear that time-to-fracture increases as elongation increases.In the potential range from -1.3 V to -0.7 V,the specimens show excellent mechanical properties,and thus this range is considered to be a corrosion prevention range.
