The effect of carbon content on the mechanical properties of tungsten carbide-cobalt hard alloys

1965 ◽  
Vol 4 (6) ◽  
pp. 454-459 ◽  
Author(s):  
G. S. Kreimer ◽  
M. R. Vakhovskaya
Keyword(s):  
Mechanical Properties ◽  
Tungsten Carbide ◽  
Carbon Content ◽  
Hard Alloys

scholarly journals Perspectives of the industrial recycling of hard-alloy materials waste by electro-erosive grinding

2018 ◽  
Vol 224 ◽  
pp. 01010
Author(s):  
Kharis Rakhimyanov ◽  
Valentina Marusina
Keyword(s):  
Mechanical Properties ◽  
Specific Surface ◽  
Tungsten Carbide ◽  
Hard Alloy ◽  
Physical And Mechanical Properties ◽  
Spherical Shape ◽  
Production Waste ◽  
Hard Alloys ◽  
Sustainable Technologies ◽  
Powder Particles

The creation of efficient industries is possible by using sustainable technologies based on the processes of recycling of the production waste. First of all, it refers to expensive material waste, including hard alloys. The electro-erosive grinding is considered to be the effective method of recycling such materials. The results of research on recycling the tungsten-cobalt hard alloy show the possibility of obtaining tungsten-carbide powders possessing improved physical and mechanical properties. The technology mentioned is also perspective for recycling tungstenless hard-alloy waste both at the laboratory devices equipped with the RC-generator and at the industrial installations of bulky grinding. It is established experimentally that the electro-erosive grinding of the TN20 tungstenless hard alloy at the laboratory provides obtaining the main volume (up to 85%) of the powder particles of the spherical shape having a dimension of 5 µm and the specific surface of 31.5 m2/g. Higher physical and mechanical properties of powders are also provided during recycling the TN20 alloy waste at the industrial installations of bulky grinding.

Preparation and Mechanical Properties of Nanostructured Tungsten Carbide Alloys Strengthened by Carbon Nanotubes

2003 ◽  
Vol 788 ◽  
Author(s):  
G. L. Tan ◽  
X. J. Wu ◽  
Z. Q. Li
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tungsten Carbide ◽  
Hard Alloys ◽  
Composite Powders ◽  
Press Temperature ◽  
Novel Approach ◽  
Average Grain Size ◽  
Nanostructured Tungsten Carbide

ABSTRACTA novel approach for the synthesis of carbon nanotubes strengthened nanostructured tungsten carbide was investigated, in which nanophase tungsten powders are carburized by C2H2 instead of CO and a fraction of decomposed carbons were in situ converted to nanotubes. In this way, the composite powders of nanocrystal WC-Co and carbon nanotubes have been in situ prepared. The composite WC-Co powders were then hot pressed into bulk alloy which shows a exceptionally high microhardness up to 3307 kg/mm2. It is proposed that carbon nanotubes with extra high Young's modulus (1.8 Tpa) play both roles on strengthening the composite matrix and prohibiting growth of WC grains, which results in the great improvement of the mechanical properties of the samples. The average grain size of the prepared WC-Co hard alloys was estimated to be less than 100 nm. The effect of hot press temperature on the mechanical properties of the prepared alloys was also studied in detail.

Preparation of WC-TiC-Ni3Al-CaF2 functionally graded self-lubricating tool material by microwave sintering and its cutting performance

2020 ◽  
Vol 39 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Siwen Tang ◽  
Rui Wang ◽  
Pengfei Liu ◽  
Qiulin Niu ◽  
Guoqing Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Microwave Heating ◽  
Cutting Performance ◽  
Conventional Heating ◽  
Hard Alloys ◽  
Dry Cutting ◽  
Temperature Oxidation ◽  
Lubricating Material ◽  
Heating Technology

AbstractWith the concern of the environment, green dry cutting technology is getting more and more attention and self-lubricating tool technology plays an important role in dry cutting. Due to the demand for high temperature performance of tools during dry cutting process, cemented carbide with Ni3Al as the binder phase has received extensive attention due to its excellent high temperature strength and high temperature oxidation resistance. In this paper, WC-TiC-Ni3Al-CaF2 graded self-lubricating material and tools were prepared by microwave heating method, and its microstructure, mechanical properties and cutting performance were studied. Results show that gradient self-lubricating material can be quickly prepared by microwave heating technology, and the strength is equivalent to that of conventional heating technology. CaF2 not only plays a role in self-lubrication, but also refines the grain of the material. A reasonable gradient design can improve the mechanical properties of the material. When the gradient distribution exponent is n1 = 2, the material has high mechanical properties. Cutting experiments show that the WC-TiC-Ni3Al-CaF2 functional gradient self-lubricating tool has better cutting performance than the homogeneous WC-TiC-Ni3Al hard alloys.

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