Improvement of Wear Resistance of Magnesium Alloy AZ91HP by High Current Pulsed Electron Beam Treatment
来源期刊：材料热处理学报2004年第5期
论文作者：JIANG Li-min ZHOU Ji-yang DONG Chuang GAO Bo ZOU Jian-xin HAO Sheng-zhi
关键词：Mg alloy; high current pulsed electron beam (HCPEB); surface modification; wear;
摘 要：Surface modification of magnesium alloy AZ91HP (9wt%Al, 0.5wt%Zn, 0.5wt%Mn, Mg remaining percentage) by high current pulsed electron beam (HCPEB) treatment was studied in this paper. The secondary phase Mg17Al12 is nearly completely dissolved and as a result, a super-saturated solid solution forms on the re-melted surface.The microhardness is increased both in and far beyond the heat-affected zone (HAZ), reaching about 250μm.Measurements on sliding wear have shown that the wear resistance of the treated samples was improved by a factor of about 2.4 as compared to the as-received sample. It is also found that the sliding wear resistance can be further improved by surface alloying with TiN.
JIANG Li-min1，ZHOU Ji-yang1，DONG Chuang1，GAO Bo1，ZOU Jian-xin1，HAO Sheng-zhi1
(1.State Key Lab. of Materials surface Modification by Laser, Ion and Electron Beams, Dalian, China;
2.Department of Materials Engineering, Dalian University of Technology, Dalian, China)
摘要:Surface modification of magnesium alloy AZ91HP (9wt%Al, 0.5wt%Zn, 0.5wt%Mn, Mg remaining percentage) by high current pulsed electron beam (HCPEB) treatment was studied in this paper. The secondary phase Mg17Al12 is nearly completely dissolved and as a result, a super-saturated solid solution forms on the re-melted surface.The microhardness is increased both in and far beyond the heat-affected zone (HAZ), reaching about 250μm.Measurements on sliding wear have shown that the wear resistance of the treated samples was improved by a factor of about 2.4 as compared to the as-received sample. It is also found that the sliding wear resistance can be further improved by surface alloying with TiN.
关键词:Mg alloy; high current pulsed electron beam (HCPEB); surface modification; wear;
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