scholarly journals Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools With Silicides Compounds as Binder Phase

2020 ◽  
Author(s):  
Kateryna Slipchenko ◽  
Denys Stratiichuk ◽  
Nadezhda Belyavina ◽  
Vladimir Turkevich ◽  
Volodymyr Bushlya ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Binder Phase ◽  
Temperature Oxidation ◽  
Transitional Metals ◽  
Microstructure And Mechanical Properties ◽  
High Pressure High Temperature ◽  
Steel Aisi ◽  
The Relationship

Silicide based compounds are widely used for coatings due to their high melting temperature, oxidation resistance and moderate density. Employment of binders based on silicides of transitional metals can provide cBN-based cutting tools with higher chemical stability and better performance. The relationship between phase composition, microstructure and mechanical properties of novel polycrystalline cubic boron nitride (PcBN) materials were investigated. Three series of PcBN samples were made by high pressure high temperature (HPHT) sintering. Silicides of chromium – CrSi2, vanadium – VSi2 and molybdenum MoSi2 were used as a binder phase in each case, while aluminum was introduced to the mixture as an oxygen getter. During HPHT sintering at temperatures above 1850 ∘C the formation of borides of binder phase were observed in cases with VSi2 and MoSi2. For system with CrSi2 binder, temperature of boride formation was found to be lower – 1600 ∘C. Materials with MoSi2 binder phase demonstrated the highest level of microhardness. Performance of materials were investigated in conditions of machining of stainless steel AISI 316L and Inconel 718.

Evaluation of Mechanical Properties and Microstructure of a High Carbon-Vanadium Tool Steel Produced by Powder Metallurgy

2006 ◽  
Vol 530-531 ◽  
pp. 140-144 ◽  
Author(s):  
E.P. Soares ◽  
Jan Vatavuk ◽  
Renato Panelli ◽  
M.F. Pillis
Keyword(s):  
Mechanical Properties ◽  
Tool Steel ◽  
Hot Isostatic Pressing ◽  
Cutting Tools ◽  
Tool Steels ◽  
High Carbon ◽  
Microstructure And Mechanical Properties ◽  
Great Responsibility ◽  
The Relationship ◽  
Hip Process

Tool steels have important participation in the worldwide market of steels. They are used by metal-mechanical industry as cutting tools, molds, punches, etc. Because the use is of great responsibility, it is important to discuss the relationship between microstructure and mechanical properties. The starting material was powder of a commercial tool steel with the composition (wt%) 2.5%C, 5.25%Cr, 0.9%Si, 9.75%V, 0.5Mn, 1.3%Mo and balance Fe. The samples were obtained by hot isostatic pressing (hip) process, and than were austenitizing at 1120°C and submitted to tempering in the temperature range varying from 430° to 550°C. The aim of this work was to evaluate the correlation between heat treatment, microstructure and mechanical properties. Results of toughness and hardness are presented.

scholarly journals Effects of Boron Addition on the Microstructure and Mechanical Properties of (Ti,Ta)(C,N)-Co Based Cermets

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 787
Author(s):  
Ernesto Chicardi ◽  
Francisco José Gotor Martínez
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Intermetallic Compound ◽  
Solid Solutions ◽  
General Trend ◽  
Liquid Phase Sintering ◽  
Binder Phase ◽  
Boron Addition ◽  
Sintering Additive ◽  
Microstructure And Mechanical Properties

In this work, a titanium–tantalum carbonitride based cermet, with cobalt as the binder phase and boron as a sintering additive, was developed by a mechanically induced self-sustaining reaction process using two different methodologies. The boron additive was added to prevent the formation of brittle intermetallic compounds generally formed during the liquid phase sintering step due to the excessive ceramic dissolution into the molten binder phase. A systematic study was carried out to understand the effects of boron addition on the nature of the phases, microstructure, and mechanical properties of cermets. With the boron addition, the formation of two different boride solid solutions, i.e., (Ti,Ta)B2 and (Ti,Ta)3B4, was observed. Moreover, the nature of the binder was also modified, from the (Ti,Ta)Co2 brittle intermetallic compound (for cermets without boron addition) to ductile and tough (Ti,Ta)Co3 and α-Co phases (for cermets with boron addition). These modifications caused, as a general trend, the increase of hardness and toughness in cermets.

Microstructure and Properties of Hot-Pressing Sintered Tungsten Carbide Composites by Adding Cubic Boron Nitride

2015 ◽  
Vol 655 ◽  
pp. 45-48
Author(s):  
Kun Li ◽  
Hai Yan Chen ◽  
Qiu Shuang He ◽  
Li Hua Dong
Keyword(s):  
Mechanical Properties ◽  
Boron Nitride ◽  
Flexural Strength ◽  
Tungsten Carbide ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Cubic Boron Nitride ◽  
Microstructure And Mechanical Properties ◽  
Hot Pressing Sintering ◽  
Sintering Method

(0, 5, 10, 15, 20) vol% CBN-WC/Co composites were consolidated by ball milling and the following hot-pressing sintering method. WC, Co and CBN powders were used as the starting materials. The effects of the CBN content on the density, microstructure and mechanical properties of CBN-WC/Co composites were investigated. The results showed that the CBN content had remarkable influence on the microstructure and mechanical properties of CBN-WC/Co Composites. With the increasing content of CBN, the density decrease, while Vickers hardness and flexural strength increased initially to the maximum values and then decreased at CBN 10 vol%. When 10 vol% CBN-WC/Co powders were hot-pressing sintered at 1350°C and 20MPa for 90 min, an excellent Vickers hardness of 19.8GPa was achieved, combining a flexural strength of 682MPa.

Microstructure and Mechanical Properties of the Stainless Steels Obtained by Sintering Mixtures of AISI 316L and Silicon Powders

2006 ◽  
Vol 513 ◽  
pp. 35-50
Author(s):  
K. Sikorski ◽  
Agnieszka Szymańska ◽  
M. Sekuła ◽  
D. Kowalczyk ◽  
Jan Kazior ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Austenitic Steel ◽  
Stainless Steels ◽  
Hydrogen Atmosphere ◽  
Aisi 316L ◽  
Microstructure And Mechanical Properties ◽  
Steel Aisi

The aim of the study was to obtain a ferritic-austenitic stainless steel through sintering of the mixture of austenitic steel AISI 316L powders with silicon in the amount ranging from 1 to 7%. The pressed mixtures were sintered at 1240oC for 60 minutes under hydrogen atmosphere. The results of the silicon admixture on the density, porosity, microstructure and mechanical properties of the sintered specimens are discussed.

Stereological Characterisation of Steel Wide Strip Microstructures

2005 ◽  
Vol 473-474 ◽  
pp. 207-212
Author(s):  
Zoltán Gácsi ◽  
Zsolt Csepeli
Keyword(s):  
Mechanical Properties ◽  
Production Technology ◽  
Cross Sections ◽  
Rolled Steel ◽  
Continuous Development ◽  
Wide Strip ◽  
Microstructure And Mechanical Properties ◽  
Image Analyser ◽  
The Relationship

The continuous development of steel products requires the detailed investigation of relationships between the production technology, microstructure, and mechanical properties. This paper describes the detailed characterisation of normalising rolled and of thermomechanically rolled steel wide strip microstructures and presents the relationship between their microstructures and their mechanical properties. The morphology of the microstructures were characterised by using an image analyser. The most important measured stereological parameters were the area, perimeter, length and breadth of the ferrite and pearlite cross-sections.

scholarly journals Investigation of the mechanical properties and cutting performance of cBN-based cutting tools with Cr3C2 binder phase.

Procedia CIRP ◽  
2018 ◽  
Vol 72 ◽  
pp. 1433-1438 ◽  
Author(s):  
Kateryna Slipchenko ◽  
Igor Petrusha ◽  
Vladimir Turkevich ◽  
Jakob Johansson ◽  
Volodymyr Bushlya ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cutting Tools ◽  
Cutting Performance ◽  
Binder Phase
Sign in / Sign up

Export Citation Format

Share Document