Effect of Cryogenic Treatment on the Performance of Ultrafine Cemented Carbide

2014 ◽  
Vol 1015 ◽  
pp. 181-184 ◽  
Author(s):  
Ai Min Jiang ◽  
Xian Quan Jiang ◽  
Rong Yu ◽  
Rong Jie Yang
Keyword(s):  
Magnetic Properties ◽  
Coercive Force ◽  
Rupture Strength ◽  
Cryogenic Treatment ◽  
Cemented Carbide ◽  
Cemented Carbides ◽  
Transverse Rupture Strength

The effect of cryogenic treatment on the mechanical and magnetic properties of WC–6% Co Ultrafine cemented carbides has been investigated in this paper. The results show that after the cryogenic treatment, the hardness slightly increases from 1750 to 1830, however, the transverse rupture strength decreases from 2510 MPa to 2480MPa. ,the magnetization decreased from 5.82% to 5.72%, decreasing 1.71%for 24 h, but the coercive force slightly increases and reaches the maximum of 24 kA/m for 2h.

scholarly journals Effect of Specimen Volume on Transverse-Rupture Strength of WC-10%Co Cemented Carbide

1977 ◽  
Vol 24 (8) ◽  
pp. 232-235
Author(s):  
Hisashi Suzuki ◽  
Teruyoshi Tanase ◽  
Fumio Nakayama ◽  
Koji Hayashi
Keyword(s):  
Rupture Strength ◽  
Cemented Carbide ◽  
Transverse Rupture Strength ◽  
Specimen Volume

Simultaneously high fracture toughness and transverse rupture strength in ultrafine cemented carbide

CrystEngComm ◽  
2013 ◽  
Vol 15 (17) ◽  
pp. 3305 ◽  
Author(s):  
Chongbin Wei ◽  
Xiaoyan Song ◽  
Jun Fu ◽  
Xuemei Liu ◽  
Haibin Wang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Rupture Strength ◽  
Cemented Carbide ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Transverse Rupture Strength

Effects of Nano-Al2O3 Additions on Microstructures and Properties of WC-8Co Hard Metals

2010 ◽  
Vol 97-101 ◽  
pp. 1649-1652 ◽  
Author(s):  
Lan Sun ◽  
Ji Xiong ◽  
Zhi Xing Guo
Keyword(s):  
Mechanical Properties ◽  
Magnetic Properties ◽  
Coercive Force ◽  
Rupture Strength ◽  
Al2o3 Content ◽  
Al2o3 Nanoparticles ◽  
Magnetic Intensity ◽  
Hard Metals ◽  
Conventional Sintering

To investigate the role of nano-Al2O3, WC–Al2O3–8wt%Co hard metals was mixed with 0-1.2 wt% nano-Al2O3 and prepared by conventional sintering (CS) for 2 h at 1440°C to see whether the addition of Al2O3 could improve densification behaviour, the microstructure and mechanical properties of the samples. The results showed that the use of Al2O3 nanoparticles as dispersions could reduce the porosity of WC-Co alloy and decrease the relative density; it could also inhibit the growth of the grains of WC-Co hardmetal to enhance the hardness and transverse rupture strength of the alloy in a proper range. The influence of Al2O3 content on the magnetic properties including coercive force and saturated magnetic intensity of the WC–Al2O3–8wt%Co hardmetals manifested the additive of nano-Al2O3 have effect on the WC grain growth inhibition and the formation of decarbonization phase in the alloy.

Mechanical Properties of WC-Co Cemented Carbide Prepared via Vacuum Sintering

2013 ◽  
Vol 275-277 ◽  
pp. 1917-1920
Author(s):  
Bing Liang Liang ◽  
Yun Long Ai ◽  
Chang Hong Liu ◽  
Nan Jiang
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Relative Density ◽  
Sintering Temperature ◽  
Rupture Strength ◽  
Cemented Carbide ◽  
Vacuum Sintering ◽  
Transverse Rupture Strength ◽  
Temperature Range ◽  
Peak Value

WC-Co cemented carbide specimens were prepared via vacuum sintering. The influences of composition and sintering temperature on phase composition, microstructure and mechanical properties of WC-Co cemented carbide were investigated. The results show that dense specimens were obtained in the sintering temperature range of 1280~1400°C and the relative density reached over 95%. Only WC and Co3W3C (-phase) were detected by XRD without any else phases, even though Co. With the ascended sintering temperature, hardness increased and the transverse rupture strength (TRS) ascended to peak value and then descended. WC-Co cemented carbide with excellent mechanical properties (HRA>90, TRS~700MPa and KIC>10MPa•m1/2) were obtained.

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