Study on the Microstructure and Properties of Medium Manganese Martensitic Cast Iron under Different Heat Treatment

2020 ◽  
Vol 10 (08) ◽  
pp. 639-646
Author(s):  
宇诗 杨
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Microstructure And Properties

scholarly journals Effect of Heat Treatment on Microstructure and Properties of Semi-solid Chromium Cast Iron

2004 ◽  
Vol 45 (3) ◽  
pp. 880-887 ◽  
Author(s):  
Nuchthana Poolthong ◽  
Hiroyuki Nomura ◽  
Mitsuharu Takita
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Microstructure And Properties ◽  
Semi Solid ◽  
Chromium Cast Iron

Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron White Cast Iron

2010 ◽  
Vol 457 ◽  
pp. 225-230 ◽  
Author(s):  
Jian Jun Zhang ◽  
Yi Min Gao ◽  
Jian Dong Xing ◽  
Sheng Qiang Ma ◽  
Ye Fei Li ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Brittle Fracture ◽  
Ductile Fracture ◽  
White Cast Iron ◽  
Fracture Morphology ◽  
Combined Process ◽  
Microstructure And Properties ◽  
High Boron ◽  
Morphology Changes

The effects of forging and heat treatment on microstructure and properties of high boron white cast iron were investigated in this paper. The results show that forging breaks up boride network and makes broken boride particles uniformly distributed in matrix. During subsequent heat treatment, spheroidized boride is able to be obtained. The hardness of high boron white cast iron increases slightly (from 51.4 HRC to 54.7 HRC) while the toughness increases obviously (from 5 J/cm2 to 107 J/cm2) by combined process of forging and heat treatment. Fracture morphology changes from brittle fracture to ductile fracture.

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.

Semisolid heat treatment of chromium cast iron

2006 ◽  
Vol 19 (2) ◽  
pp. 130-133
Author(s):  
R. Das ◽  
K. K. Ray ◽  
A. K. Chakrabarti
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Chromium Cast Iron
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