modern high strength low alloyed steels

310 Pages·2010·22.97 MB·English

25–26th November 2010 / Pilsen, Czech Republic
Plenary talks
Kraus L., Nový, Z., Šuba J. / 10 years of the company COMTES FHT 8
Meyer L. W., Pursche F. / Modern high strength low alloyed steels 13
Valiev R. Z. / Bulk nanostructured metallic materials
for innovation applications 19
Materials for Transport Equipment
Louda P., Ro¿ek Z. / Applications of nanocrystalline thin coatings
produced by plasma methods 25
Kasl J. / The analysis of failed locomotives wheel 29
Novák, S., Mráček J. / The experience from welding
of high-strength fine-grained steels 34
Očenášek V., Karas V. / The effect of aluminium contents
on structure and properties of CuAl9Fe3 forgings 44
Rusz S., Čížek L., Kedroň J., Tyšlar S., Žmija Z.
Influence of heat treatment on structure and properties of brass
after DRECE processing 50
Schieck F., Paul A., Pröhl M. / Forming technologies in automotive
industry by application of light weight materials 54

Skrbek B., Nosek V., Kysel M., Sláma P. / Solution of modern pair
of guide and valve of piston engines 60
Materials for Power Engineering
Zrník J., Strunz P., Maldini M., Wiedenmann A.
Structure degradation of nickel base single crystal alloy
under creep condition 70
Adolf Z., Bažan J., Socha L. / Conditions for formation
of boron oxide and nitride in boron-alloyed steels 78
Balcar M., Novák J., Sochor L., Fila P., Martínek L.
ASTM A694 F60 heat treatment and mechanical properties 83
Greger M., Kander L., Mašek V., Kočiščáková P.
Structure and properties of ultra-fine grain titanium
used for special applications 88
25–26th November 2010 / Pilsen, Czech Republic
Hosnedl P., Nový Z., Konopík P., Džugan J., Tikal F.
Structural materials and fluoride salts
for high temperature applications 94
Martínek P., Podaný P., Poláková I. / Open-die forging
of duplex steels 103
Nový Z., Motyčka P., Podaný P., Dlouhý J. / Recrystalization
of nickel superalloys 110
Advanced Materials Processing
Technologies
Kliber J. / Selected modern operations and research
subject matters in material forming 120
Mašek B. / Steel and what we still do not know about it 129
Aišman D., Jirková H., Mašek B. / Mini-thixoforming
tool steel X210CR12 135
Hauserová D., Dlouhý J., Nový Z., Zrník J. / Influence of carbides
spheroidisation on mechanical properties in medium carbon steel 140
Jeleñkowski J., Ciski A., Babul T. / Substructure of deep
cryogenically treated HS6-5-2 high speed steel 148
Kusý M., Behúlová M., Grgač P. / Solidification microstructures
in the powder particles of hypereutectic iron based alloy 160
Malina J., Jirková H., Mašek B. / Influence of initial pearlite
morphology on the resulting structure and distribution
of deformation after cold flow forming process 167
Mašek B., Jirková H., Klauberová D., Petrenec M., Beran P.
Unconventional thermomechanical treatment of advanced
high strength low-alloyed steel 173
Němeček S., Mužík T., Urbánek M., Nový Z. / Laser welding
of high strength steels 180
Olszar M., Olszar M., Koňařík P., Hermann R.
Treatment of ultra fine-grained steels using the strad method 186
Šuchmann P., Krejčík J., Fila P. , Psík E., Jelen L.
Development of new tool steels for forging dies 192
Urbánek M., Nesvadba P., Mašek B., Hronek P.
Alternative explosion-formed joint of high-strength tube and sleeve 199
25–26th November 2010 / Pilsen, Czech Republic
Zemko M., Matušek P., Martínková J., Fedorko M., Pětvaldský L.
Modelling the process of forming railway wheels 205
Analysis and Testing of Materials
Doig A. / Some metallurgical aspects of main battle tank
armour and anti-armour warheads 212
Švejcar J. / Current potentials of structure analysis 218

Viehrig H. W. / The master curve approach as an approved
fracture mechanics test method for more than one decade 228
Černý I. / The use of DCPD method for measurement of growth
of physically short fatigue cracks 242
Ďuriš R. / A geometric nonlinear thermo-elastic analysis
with the sandwitch bar element 248
Džugan J., Konopík P. / Small punch tests for tensile properties
and fracture toughness determination 256

Große-Heilmann N., Peters A., Šuchmann P.
Characterisation of low alloyed steels using
jominy-phase-diagrams 267
Hrušák D., Hájková L., Dluhoš L. / Morphological and functional
patern of cells cultured on nanostructured titanium 273
Matocha M. / The evaluation of circumferential weld
of reheater header by small punch tests 278
Růžička J., Prantl A., Španiel M. / Ductile damage parameters
identification in Fe program Abaqus 284

Sláma P., Macháčková K. / Influence of heat treatment on structure
and properties of the CUAL10Ni5Fe4 alloy rods 288
Slováček M., Kovařík J., Tejc J., Bárta J., Pustějovský P.
Heat treatment numerical simulation of sleeved roll 296
Wiedemeier B., Sander M., Richard H. A., Peters A.
Fracture-mechanical characterization of steel tubes
using arc-shaped specimens 303
25 – 26 November 2010
Pilsen, Czech Republic
Plenary Talk
10 YEARS OF THE COMPANY COMTES FHT
Libor Kraus1, Zbyšek Nový2, Jan Šuba3
Abstract
In the paper the history and development of COMTES FHT a.s. company is described. There
are stated important milestones in the history, organizational structure, achievements, the
most important areas of activities and future development.
Keywords: comtes fht, history, company activities
The company COMTES FHT s.r.o. was established in 2000 as an engineering
consultancy firm with seven employees. Its headquarters were two rented offices in
a block of flats, equipped with office PCs and DEFORM software licence for
simulations of forming and heat treatment processes.
Figure 1 COMTES FHT s.r.o. in Plze(cid:278), 2000
The business plan even became part of the company’s name: COMplete
TEchnological Service for Forming and Heat Treatment. From the outset and for the
whole decade, the company focused on research into metallic materials and their
processing by forming, heat treatment and thermomechanical treatment. In 2002, an
additional two offices were rented in order to establish the company’s first
metallographic laboratory. COMTES DFM s.r.o., a daughter company, was formed
jointly by COMTES FHT and an Austrian firm for the purpose of selling and providing
consultancy for DEFORM software in the Czech and Slovak Republics. A workshop for
manufacturing samples was equipped in 2003. The company's development gained
momentum in 2004. We succeeded in winning a public tender called by the Czech
Ministry of Education for a research plan which included funding for procuring
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equipment, and we purchased our first research facilities in Lobezská Street in Plze(cid:278).
In addition to offices, the premises were gradually adapted to include laboratories for
forming, heat treatment, light and electron microscopy, sample preparation and a
mechanical workshop. To guarantee the level of quality of work and results, a
certified quality management system according to (cid:253)SN EN ISO 9001 was introduced
in 2005. In 2006, the material testing laboratory was accredited according to (cid:253)SN EN
ISO/IEC 17025:2005.
Figure 2 COMTES FHT s.r.o. in Plze(cid:278), 2004
The year 2006 saw another important step – establishing cooperation with the
German company Benteler Stahl Rohr GmbH. In 2004, we were convinced that the
new premises would be sufficient for our company's operations for several years to
come. However, due to a lack of space for experiments, we were forced to rent a
new hall outside Plze(cid:278) for a mechanical testing shop no later than 2006.
The continuing successful development of the company brought the need for new
laboratory space for instruments and equipment, and greater requirements for
utilities. The company management considered relocating the company to more
suitable premises as early as in 2006. Conditions for green field construction were
investigated at three available locations in Plze(cid:278) and its surroundings. Eventually,
production premises became available for sale at an affordable price in the town of
Dob(cid:284)any, about 12 kilometres from Plze(cid:278) and with good access to the D5 motorway.
One of the first EU structural funds projects in 2007 allowed us to purchase, adapt
and equip it with cutting edge instruments. By the end of 2007, the entire company
had relocated to the new headquarters and its research capacity was greatly
expanded. The former private limited-type company then transformed into a joint-
stock company and a non-profit research organisation under the rules of the
European Community Framework. Investing all profits into research, development,
instruments and equipment, which has been taking place since the establishment of
the company, thus became an official principle and part of the company’s articles of
association. For its capital projects, COMTES FHT a.s. received an important award in
2008: 3rd place in the Investor of the Year 2008 competition in the category
“Investment with the greatest innovation potential”.
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Figure 3 COMTES FHT a.s. in Dob(cid:284)any, 2007
The core activities of the research organisation COMTES FHT a.s. consist in research
and development of metallic materials, forming and heat treatment processes. The
organisational structure of research and development is divided into
four departments:
Figure 4 Organizational Structure
The main mission of the company is to provide comprehensive services to
engineering and metallurgical enterprises in the above areas. The range of activities
is very broad. In the mechanical testing shop and the metallographic laboratory,
materials are analysed by techniques ranging from measurement of basic
characteristics to special testing, such as fracture toughness measurement, high-
cycle and low-cycle fatigue, high-temperature testing, testing at high strain rates,
observation under an electron microscope at high magnification, EBSD phase
analysis, EDX measurement of chemical composition and others.
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