2009
DOI: 10.3788/cjl20093606.1585
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Microstructures of Laser Forming Repair 7050 Aluminum Alloy with AlSi12 Powder

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Cited by 6 publications
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“…But the characterization and causes about the pores inside parts are rarely to be analyzed and demonstrated. Wang [14] carried out a laser shaping experiment in which pre-stretched 7050 alloy plates are repaired using AlSi12 powder, the defects at the bonding interface of substrate and cladding layer are analyzed, without deeper study on the defects inside the cladding layers. Xue [15] used AlSi12 powder to repair ZL104 plates with prefabricated gap utilizing laser forming technique; A laser deposition repair experiment are accomplished by Qin on ZL114A casted substrates using ZL104 powder [16].…”
Section: Introductionmentioning
confidence: 99%
“…But the characterization and causes about the pores inside parts are rarely to be analyzed and demonstrated. Wang [14] carried out a laser shaping experiment in which pre-stretched 7050 alloy plates are repaired using AlSi12 powder, the defects at the bonding interface of substrate and cladding layer are analyzed, without deeper study on the defects inside the cladding layers. Xue [15] used AlSi12 powder to repair ZL104 plates with prefabricated gap utilizing laser forming technique; A laser deposition repair experiment are accomplished by Qin on ZL114A casted substrates using ZL104 powder [16].…”
Section: Introductionmentioning
confidence: 99%
“…7050 铝合金作为超硬铝合金, 具有高强度、 高断裂韧性及良好的抗腐蚀性能, 在汽车以及航空航天工业 材料中的应用日趋广泛 [1][2][3] 。然而, 其不足之处在于硬度较低且耐磨性能较差, 这就限制了铝合金在对硬度 及耐磨性能要求较高领域的应用。Al/Ti 金属间化合物是一种具有合理性价比与良好工艺性能的轻型结构, 具有低密度、 高弹性模量、 高硬度、 良好耐磨性、 高抗氧化性以及较好的力学性能等特性 [4][5] 。将 Al/Ti 复合粉 体作为熔覆层材料, 通过激光熔覆技术使其与基体表面熔化, 形成低稀释率、 无气孔、 无裂纹, 与基体结合良 好的 Al/Ti 金属间化合物熔覆层, 从而提高基体表面硬度和耐磨性能。 近 年 来 对 于 Al/Ti 熔 覆 层 的 研 究 主 要 是 在 钛 基 材 料 上 进 行 的 , 如 Guo 等 [6] 使 用 10 kW 横 流 CO2 激 光 器 , 在 纯 钛 基 材 上 制 备 了 Al/Ti 熔 覆 层 , 通 过 对 熔 覆 层 硬 度 及 耐 磨 性 能 的 分 析 , 确 立 了 Al/Ti 最 佳 成 分 比 ; Garcia 等 [7] 使用横流 CO2 激光器, 在纯钛表面熔覆纯 Al 粉体, 通过形成 Al/Ti 金属间化合物, 改善了纯钛表面性能。 本文通过机械球磨法将微米钛粉和铝粉进行球磨混合制备 Al/Ti 粉, 使用压片预置法, 探索铝合金表面 Al/Ti 激光熔覆层的制备工艺。通过建立有限元模型, 利用温度场分析熔覆正交试验中工艺参数对熔覆效果 [9] 。激光工艺参数可以通过激 Table 2 Values of process parameters…”
Section: 引 言unclassified