Transverse rupture strength

Transverse Rupture Strength 240-390 MPa Coefficient of Friction 0.25 (on tool steel, 50% humidity)... 

Young s Modulus of Elasticity 620-720 GPa Shear Modulus 262 GPa Poisson s Ratio 0.18 Transverse Rupture Strength 550 MPa... 

In addition to chemical analysis a number of physical and mechanical properties are employed to determine cemented carbide quality. Standard test methods employed by the industry for abrasive wear resistance, apparent grain size, apparent porosity, coercive force, compressive strength, density, fracture toughness, hardness, linear thermal expansion, magnetic permeability, microstmcture, Poisson s ratio, transverse rupture strength, and Young s... 

Hardness and solubility for other carbides make TiC an important component of sintered cemented carbides. Although the addition of TiC or WTiC2 to WC—Co alloys imparts crater wear resistance, it also reduces the transverse rupture strength and fracture toughness of these alloys. Therefore, the amount of TiC or WTiC2 added to WC—Co alloys for steel machining is kept to a minimum, typically no greater than 10 wt %. The TiC-based cermets, on the other hand, may contain 30—85 wt % TiC. 

Nominal composition (wt%) Grain size Hardness (HRA) Density (g/cm3) Transverse rupture strength (MPa) Compressive strength (MPa) Young s modulus (GPa) Relative abrasion resistance Coeff. of thermal expansion (pm/mK) (RT-1270K) Thermal Palmqvist conductivity toughness (W/mK) (kg/mm) ... 

Transition metal carbides and nitrides are not only inherently brittle at room temperature they are also difficult to manufacture. For engineering applications, the hard carbides (and nitrides) are therefore bonded or cemented by a ductile metal binder, usually cobalt or nickel (hence the name Cemented Carbides ). Additions of binder metal in the range of 5-20 wt% increase the toughness (transverse rupture strength) of the tools without seriously reducing hardness, rigidity, or compressive strength. Metallic binders also enable carbide products to be manufactured to full density. 

Afil Same as 1 0 to Ittl ex-a uuj t(pl (interIng temperature aa Increased to 11 0 P 1173 C>. This further Increased psrlirie bonding, pore spheroldlratlnn transverse-rupture strength Increased to about 01.000 psl lilt MPal. Combined carbon. 0.1 %. 

Grade" (wt%) Hardness HV30 Compressive strength (N mm ) Transverse rupture strength (N mm" ) Young s modulus (kN mm ) Fracture toughness (MPa m- /2) Mean thermal expansion coefficient (10- K- )... 

Figure 118. Transverse rupture strength (TRS) and hardness of V-containing Mo2NiB2 (after [365]).

Figure 120. Transverse rupture strength and hardness as a function of Cr addition to Mo2NiB2 (after [356]).

Transverse rupture strength versus uncut chip thickness for longitudinal and transverse grinding. (From Mayer, J.E., Jr. and Fang, G.P., NIST SP 847, 205,1993. With permission.)... 

The relationship among metal phase content, ceramic grain diameter the contiguity and transverse rupture strength fracture toughness is showed in figure 7l8Z9 and 10. 

It may be presumed that the contiguity is deleterious for transverse rupture strength fhicture toughness of Ti(C,N)-based cermets. But it will be reported in another paper that how the contiguity is controlled. 

Z. Fang. Correlation of transverse rupture strength of WC-Co with harness. International Journal of Refractory Metals Hard Materials. 23, 119(2005). 

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