Effect of zirconium and heat treatment on the microstructure and properties of cast chromium bronze for conductive parts

2015 ◽  
Vol 106 (2) ◽  
pp. 192-194
Author(s):  
Xiaohui Zhi ◽  
Feng Zhao
Keyword(s):  
Heat Treatment ◽  
Microstructure And Properties ◽  
Chromium Bronze

Effect of Cooling Rate on Microstructure and Properties of Heat-Treated Fe3Al Intermetallics

2011 ◽  
Vol 189-193 ◽  
pp. 3891-3894
Author(s):  
Ya Min Li ◽  
Hong Jun Liu ◽  
Yuan Hao
Keyword(s):  
Heat Treatment ◽  
Cooling Rate ◽  
Lattice Distortion ◽  
Annealing Furnace ◽  
Microstructure And Properties ◽  
Homogenizing Annealing ◽  
Heat Treated ◽  
Mixed Fracture ◽  
Sand Mould ◽  
The Impact

The casting Fe3Al intermetallics were solidified in sodium silicate sand mould and permanent mould respectively to get different cooling rates. After heat treatment (1000°С/15 h homogenizing annealing + furnace cooling followed by 600°С/1 h tempering + oil quenching), the microstructure and properties of Fe3Al intermetallics were investigated. The results show that the heat-treated Fe3Al intermetallics at higher cooling rate has finer grained microstructure than lower cooling rate, and the lattice distortion increases due to the higher solid solubility of the elements Cr and B at higher cooling rate. The tensile strength and hardness of the Fe3Al intermetallics at higher cooling rate are slightly higher also. However, the impact power of intermetallics at higher cooling rate is 67.5% higher than that at lower cooling rate, and the impact fracture mode is also transformed from intercrystalline fracture at lower cooling rate to intercrystallin+transcrystalline mixed fracture at higher cooling rate.

Effect of Heat Treatment on Microstructure and Properties of Cu-3Ti-1Al Alloy

2013 ◽  
Vol 749 ◽  
pp. 282-286
Author(s):  
Xian Hui Wang ◽  
Xiao Chun Sun ◽  
Xiao Hong Yang ◽  
Shu Hua Liang
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Electrical Conductivity ◽  
Electron Microscope ◽  
Treatment Process ◽  
Intermetallic Phase ◽  
Strengthening Effect ◽  
Microstructure And Properties ◽  
Optimal Heat Treatment ◽  
Transmission Electron

The effect of heat treatment on the microstructure and properties of Cu-3Ti-1Al alloy was investigated. The microstructure was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM), and the hardness and electrical conductivity were tested as well. The results showed that the hardness and electrical conductivity of Cu-3Ti-1Al alloy increased significantly after solid solution and ageing treatment. The strengthening effect of Cu-3Ti-1Al alloy was attributed to the formation of intermetallic phase such as Ti3Al and fine precipitates of coherent β-Cu4Ti. With increase of the aging time and the temperature, the precipitates became coarse and incoherent with Cu matrix, and the discontinuous precipitate β started to grow from grain boundaries toward grain interior, which decreased hardness. As the formation of Ti3Al, β-Cu3Ti and β-Cu4Ti phase can efficiently reduce Ti concentration in Cu matrix. The electrical conductivity of Cu-3Ti-1Al alloy increases. In the range of experiments, the optimal heat treatment process for Cu-3Ti-1Al alloy is solid solution at 850°C for 4h and ageing 500°C for 2h, and the hardness and electrical conductivity are 227HV and 12.3%IACS, respectively.

Effect of Heat Treatment on the Microstructure and Properties of Laser Cladding Alloy

Applied laser ◽  
2013 ◽  
Vol 33 (3) ◽  
pp. 233-238
Author(s):  
熊炜 Xiong Wei ◽  
张庆茂 Zhang Qingmao ◽  
夏琪 Xia Qi ◽  
郭亮 Guo Liang
Keyword(s):  
Heat Treatment ◽  
Laser Cladding ◽  
Microstructure And Properties

Effect of Heat Treatment on the Microstructure and Properties of Laser Cladding Alloy

Applied laser ◽  
2013 ◽  
Vol 33 (3) ◽  
pp. 233-238 ◽  
Author(s):  
熊炜 Xiong Wei ◽  
张庆茂 Zhang Qingmao ◽  
夏琪 Xia Qi ◽  
郭亮 Guo Liang
Keyword(s):  
Heat Treatment ◽  
Laser Cladding ◽  
Microstructure And Properties

Microstructure and Properties of Heat Treatment GH4169 Alloy by Laser Deposition Repair

2015 ◽  
Vol 42 (12) ◽  
pp. 1206001
Author(s):  
卞宏友 Bian Hongyou ◽  
赵翔鹏 Zhao Xiangpeng ◽  
杨光 Yang Guang ◽  
钦兰云 Qin Lanyun ◽  
王维 Wang Wei ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Laser Deposition ◽  
Microstructure And Properties ◽  
Gh4169 Alloy
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