Diamante A&T Contents
Year XXVIII - December 2022
Front Cover: YINGKOU MITOPOWDER TECHNOLGY CO. LTD
Yingkou Mitopowder Technology Co., Ltd as the pioneer manufacturer of micron-sized ultrafine
pre-alloyed powder with hydrometallurgy, has many years of experience in powder industry. We focus on the R&D and production of matrix powder for diamond tools, deeply study the characteristics of
diamond tools, satisfy the professional matrix powder demands of different customers, promote the scientific development of diamond tools industry.
Mitopowder manufactures ultrafine Cobalt-free pre-alloyed powder, Cobalt-based pre-alloyed powder, Laser welding pre-alloyed powder, Free sintering pre-alloyed powder
with advantages of porous morphology, high sintering activity and excellent cold pressing ability, etc.
In the Spotlight
10) Mitopowder, never stop pursuing excellence and making groundbreaking breakthroughs
12) Let's talk or better let's investigate about some synthetic diamonds for sintered diamond tools
16) September 5-8 2023, the 23rd edition of VITRUM will highlight the entire supply chain. The show's 40th year celebrations include the new edition of Vision Milan Glass Week
20) Use of fusion tungsten carbide in diamond drilling tool fabricationby by Radu Liviu Orban,
Technical University of Cluj-Napoca, Romania
Abstract: Fusion Tungsten Carbide (FTC), consisting of a quasi-eutectoid mixture of Di-Tungsten Carbide (W2C) and Mono-Tungsten
Carbide (WC) compounds, is, after diamond and Cubic Boron Nitride (cBN), the third known material on the Hardness Scale (3000 HV). Beside this property of exception,
associated with a high elastic modulus (rigidity) and high thermal stability (up to ~1500 K), it presents the advantage, comparing with other competitors, that can be obtained in
a granular state, of a medium particle size similar to that of diamond used as the main component of diamond tools, making it a very favorable associated active component to
diamond (in some cases, even its substitute) in these tools. It also offers the advantage that can be used in both well-known technological variants of tool fabrication - Hot Pressing (HP, at
simple geometrical shapes) and sintering by infiltration of loose mixture of powders - for binder formation (SILMP, at complex spatial shapes).
Intending to be a development of the previously published paper in issue 71/2018 of Diamante A&T , this paper is focused on the establishment of FTC structure and properties
function of its carbon content - as a premise of its rational selection function of destination and required properties of tool in which will be incorporated. To facilitate this, a brief
review of the main types of diamond drilling tools worldwide fabricated today is also included.
1st Forum Universo Diamante - Proceedings
34) The 1st Forum Universo Diamante was held in Padua, Italy and was part of the 39th AIM National Conference - Italian Association of Metallurgy (21-23 September 2022)by Seppo Leinonen
Geological Survey of Finland
The opening ceremony took place in the Aula Magna in the Palazzo Bo and the technical sessions at the Beato Pellegrino Complex of the
University of Padua. Padua has a strong University and a significant history of education. The University was celebrating its 800th anniversary in 2022. The welcome program showed in lectures front line
science and organizer did not doubt to take one of the big themes of this time to the round table discussions "Energy and raw materials". The Palazzo Bo and Aula Magna, the
Great Hall "Galileo Galilei" was an inspiration for the eyes and the whole mind - definitely, an excellent start for the conference.
36) When you say "Diamond". A warm welcome and good work to all!by O. Cai
Diamond Tools Consultant
Abstract: May my warm welcome reach all the participants of the session "FORUM UNIVERSO DIAMANTE", part of the 39th
national AIM Metallurgy Conference. I'm confident it will be a moment of technical-scientific enrichment for all of you, thanks to the sharing of information and knowledge, and that this congress will be the beginning of a wider project
aiming at developing the sectoral research through the academic support. Furthermore, I would like to thank those who have enriched and shared my experiences always willing with simplicity
to confrontation and discussion, driven by a common passion that has charecterized our lives and professional profiles. This passion has a name: "INDUSTRIAL DIAMOND" and it has found satisfaction in the diamond tools sector,
whose further development will not fail to offer new performance and unexpected uses. This development will continue more and more and the fixed algorithms used today in the robotic manufacturing
could be replaced by new "free and intelligent" ones, able to guide machines in a correct way choosing the best solution according to the case. Even today, when we talk about Diamante, history invariably accompanies us
towards the future.
38) Optimization of complex tool systems by means of multivariable functions, statistics and division of the entire process into homogenous sub componentsby S. Sorrentino1, M. Scalari2, E. Trivellin3, E. Pigozzo3, T. Giorgessi3, M. Vason3, D. Zandonella Necca4
1 Surfaces Technological Abrasives Spa
2 Luna Abrasivi S.r.l.
3 Vincent S.r.l.
4 ADI S.r.l.
Abstract: The stone, engineered stone and ceramic surfaces manufacturing processes involve numerous independent and
dependent variables, which need to be analysed, governed and optimized. Even in case of obtaining a mathematical function which describes the whole process, by virtue
of the number of variables involved, it is not possible to be sure of finding an absolute maximum or minimum (hence, absolute optimization); vice versa, using statistical sensitivity
techniques such as DOE or Experimental Design, it is possible to find a local maximum or minimum. In an industrial environment, on the other hand, it is not
possible to carry out a sufficiently large number of tests to lead to the optimization of the whole system. In practice, the polishing process is broken down into several
sub-processes, which in turn must be singularly optimized: e.g. calibration, surface smoothing (starting from coarse roughness to almost final desired roughness), polishing
(second order roughness optimization). This operation reduces the possibility of absolute optimization but allows a much rapid convergence towards an optimal
solution suitable for the industrial environment.
48) "Controlled Destruction" with diamond tools applied to modifications and recycling of major steel structuresby V. Parizzi
Cutting & Coring Consultant
NADECO National Association for Demolition and Circular Economy in Construction
Abstract: Diamond wire sawing finds more and more application not only in the deconstruction of civil and industrial reinforced
concrete structures, and for modifications of composite structures, but also in cutting operations of steel structures of pipelines, large offshore structures, naval structures,
submarines, metallurgical structures, aircraft, and nuclear decommissioning. We will analyze various application experiences, comparing sawing and processing systems.
61) New triple-layer polycrystalline diamond compactby M. Mashhadikarimi1, R.B.D. Medeiros1, L.P.P. Barreto2, D.P. Gurgel1, U.U. Gomes1, M. Filgueira3
1Post Graduate Program in Material Science and Engineering, University of Rio Grande do Norte, Natal, Brasil
2Post Graduate Program in Chemical Engineering, Federal University of Rio Grande do Norte, Natal, Brasil
3Science and Technology Center, State University of Norte Fluminense, Campos dos Goytacazes, Brasil
Abstract: The objective of this research was to obtain a triple layer Polycrystalline Diamond Compact (PDC) via the
High-pressure High-temperature (HPHT) sintering method. A thin layer of WC with 20 wt.% Nb/Ni was used as an interface between the top layer of Polycrystalline Diamond
(PCD) with pure Nb binder and WC 10 wt.% Co substrate. Sintering was performed at 1750°C under 7.7 GPa of pressure. Microhardness variation was measured
and microstructural /structural studies were done via SEM/EDS. The overall results showed that this new kind of PDC can be produced successfully using pure
niobium as a binder for the PDC layer and no sign of graphitization was detected. It was also found that using an interface having the resemblance to both substrate and sintered diamond
body caused good adhesion between layers that can result in enhanced performance and improving the durability of PDC.
News ed Events
78) Marmomac 2022: 47,000 operators from 132 countries attended the event at Veronafiere (+49% over 2021)