摘要
对Mg-9Al-Zn-0.16La合金进行410℃/16 h/AC+170℃/24 h/AC的T6处理,观察了热处理前后合金的组织形貌,并对热处理前后的合金在3.5%NaCl溶液中进行了0~168 h的失重腐蚀测试。结果表明,T6处理后,Mg-9Al-Zn-0.16La合金中的β相经过溶解再析出的过程,使得其析出方式发生改变,β相由断续状变为层片状;且由于β相析出方式和形貌的改变,在3.5%NaCl溶液中,Mg-9Al-Zn-0.16La合金的耐蚀性能明显提高,其腐蚀速率由铸态时的6.3 mg·cm-2·d-1降低到T6态的4.5 mg·cm-2·d-1。
By solution and aging treatment( T6) at 410 ℃ /16 h /AC + 170 ℃ /24 h /AC,the precipitation phase of Mg-9Al-Zn-0. 16La alloy was observed,and the average corrosion rate in 3. 5% NaCl solution for 0- 168 h was tested. The results show that after T6 treatment,the β phase precipitation mode is different,the discontinued β phase is transformed into layered structure during solution and aging treatment. in the mean while,the corrosion resistance of tested alloy in 3. 5% NaCl solution is reduced from 6. 3 mg·cm- 2·d- 1of as-cast to 4. 5 mg·cm- 2·d- 1of T6 treatment.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第5期64-68,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50901048)
太原理工大学2012年校专项/青年基金(2012L055)
关键词
热处理
T6
耐蚀性能
Β相
heat-treatment
T6
corrosion resistance
β-phase
