Tensile and Fatigue Characteristics of WC-20wt%Co Cemented Carbide with Sintering Methods
نویسندگان
چکیده
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging die cutting tools. manufactured by liquid phase sintering (LPS), a new process for densification been developed. In this study, cylindrical rod shaped tensile fatigue specimens of WC-20wt%Co were fabricated using commercial methods such as vacuum (VS), low pressure (LP), sinter HIP (S-HIP), after sintering(VS+HIP). The effect the on microstructure, life was investigated. relative density average size WC particles increased additional treatment. Also large abnormal observed. test, deviation (maximum strength, elongation) minimized VS+HIP specimen due to densification. Based uniaxial tensile-compression SN curve concluded be log?a = -0.11244logNf +3.66817. Furthermore, increase particle caused have lower than VS specimen. However, when high applied during process, internal defects standard reduced.
منابع مشابه
Wear Behavior in Micro and Nano-Structured WC-9Co-0.7VC Cemented Carbide Produced by Rapid Hot Press Sintering
The effect of CaO on the formation of β- and γ-zirconia nanoparticles from α-zirconia was investigated and their stability evaluated via mechanical activation. α-ZrO2+8.5wt%CaO powder was milled for 2-150 hours with ball-to-powder weight ratios (BPWR) of 40:1 and 60:1. Structural evaluations were conducted using X-Ray diffraction and scanning electron microscope (SEM). Thermal analysis wa...
متن کاملEffect of SiC Nanowhisker on the Microstructure and Mechanical Properties of WC-Ni Cemented Carbide Prepared by Spark Plasma Sintering
Ultrafine tungsten carbide-nickel (WC-Ni) cemented carbides with varied fractions of silicon carbide (SiC) nanowhisker (0-3.75 wt.%) were fabricated by spark plasma sintering at 1350°C under a uniaxial pressure of 50 MPa with the assistance of vanadium carbide (VC) and tantalum carbide (TaC) as WC grain growth inhibitors. The effects of SiC nanowhisker on the microstructure and mechanical prope...
متن کاملFRACTURE AND FATIGUE BEHAVIOR OF WC-Co AND WC-CoNi CEMENTED CARBIDES
The fracture and fatigue characteristics of several cemented carbide grades are investigated as a function of their microstructure. In doing so, the influence of binder chemical nature and content (Co and 76wt%Co-24wt%Ni), as well as carbide grain size on hardness, flexural strength, fracture toughness and fatigue crack growth (FCG) behavior is evaluated. Mechanical testing is combined with a d...
متن کاملInfluence of electrical discharge machining on sliding friction and wear of WC–Ni cemented carbide
Tribological characteristics of fine-grained WC–8 wt%Ni with different surface finishing conditions corresponding to sequential wire electrical discharge machining (wire-EDM) or grinding were investigated by performing dry reciprocating sliding experiments on TE77 pin-on-plate equipment with WC–6 wt%Co as mating material. Surface finishes and wear surfaces were characterized using surface topog...
متن کاملThe Effect of sintering temperature on microstructure and hardness of milled WC- 20 wt.% equiatomic (Fe,Co) cemented carbides
In this study, WC–20 wt.% equiatomic (Fe,Co) powder mixture was milled in a planetary ball mill. The effects of different milling time (15 min, 5h, 10h, and 25 h) and sintering temperatures on the microstructure and mechanical properties of this equi-Fe substituted cermet were investigated. The structural evolution and the crystallite size changes of the powders during milling were monitored by...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Korean Journal of Metals and Materials
سال: 2022
ISSN: ['1738-8228', '2288-8241']
DOI: https://doi.org/10.3365/kjmm.2022.60.3.227