- Type of paper
: Paper in journal
Title: Strengthening of steel č5432 by thhermal cycling treatment
- Authors:
- Smoljan, Božo (108601)
Journal: Zbornik radova Tehničkog fakulteta Rijeka
Number: 1
ISSN: 0353-281
Volume: 13
Year: 1993
Pages: from 83 to 91
Number of references: 13
Language: hrvatski
Summary: Abstract - The possibility of strengthening of steel č5432
by
thermal cycling treatment has been investigated.
The strengthening of steel č5432 by thermal cycling treatment has
been estimated on the basis of the steel resistance to brittle
fracture and to excessive plastic deformation, i.e. on the basisof
the yield strength and Charpy-V toughness. Better results of the
yield strength and Charpy-V toughness are obtained by the
appropriate thermal cycling treatment than by quenching and
tempering of steel č5432.
Keywords: Strengthening of Steel, Thermal Cycling Treatment, Heat treatment, Yield strength, Toughness, Steel
- Type of paper
: Paper in journal
Title: The Dependence of Constructive Strength on Structure of
Steel Č.4732
- Authors:
- Smoljan, Božo (108601)
Journal: Strojarstvo
Number: 5
ISSN: 0562-1887
Volume: 34
Year: 1992
Pages: from 101 to 104
Number of references: 11
Language: hrvatski
Summary: The dependence of constructive strength and the behavior
of steel on occasion of quenching, on structure of steel, and
particularly, on prior austenitic grain size has been analyzed.
The increase of constructive strength of quenched and tempered
steel by refinement of the prior austenitic grain size may be
obtained only on condition that the negative effects of decrease
hardenability during quenching are avoided.
Keywords: Steel, Structure of, Constructive Strength, Grain Size
- Type of paper
: Paper in journal
Title: The Microstructure Modifications of Steel Which Occur
During the Thermal Cycling Treatment
- Authors:
- Smoljan, Božo (108601)
Journal: Ljevarstvo
Number: 4
ISSN: 0024-5402
Volume: 34
Year: 1992
Pages: from 87 to 92
Number of references: 12
Language: hrvatski
Summary: The microstructure modifications rising in steel during
thethermal cycling treatment with combination of diffusion anddiffusionless
transformations of steel, have been investigated.
Fairly better results of constructive strength are obtained bythe
appropriate thermal cycling treatment than by quenching and
tempering of steel. After thermal cycling treatment, steel has
finer structure of the prior austenite and that is thefundamental reason
for increasing of constructive strength inrelation to quenched and tempered
steel.
Keywords: Steel, Microstructure, Thermal Cycling Treatment
- Type of paper
: Paper in journal
Title: The Optimization of Thermal Cycling Treatment of Steels
- Authors:
- Smoljan, Božo (108601)
Journal: Metalurgija
Number: 2
ISSN: 0543-5846
Volume: 32
Year: 1993
Pages: from 17 to 22
Number of references: 14
Language: hrvatski
Summary:
Te optimization of steel strengthening by thermal cyclingtreatment has been
done. The role of particular parts of
thermal cycling treatment on steel strengthening has been
investigated, and optimization of parameters of the mentionedheat treatment
has also been done. In the thermal cyclingtreatment both, temperature
cycling and the double quench,increase constructive strength value of
steel, i.e. the steelresistance to brittle fracture and to excessive
plasticdeformation. The constructive strength is not affected by
thevariation of parameters of combined thermal cycling treatmentwith double
quench.
Keywords: Steel, Heat Treatment, Thermal Cycling Treatment, Factorial Experiment
- Type of paper
: Paper in journal
Title: The Influence of Initial Structure on Results of Thermal
Cycling Treatment of Steel
- Authors:
- Smoljan, Božo (108601)
Journal: Zavarivanje
Number: 4
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 133 to 138
Number of references: 12
Language: hrvatski
Summary: The influence of initial structure on results of
strengthening ofsteel Č4732 by thermal cycling treatment has been
investigated.It has been established that the initial structure does not
exertany influence on the results of thermal cycling treatment. It hasbeen
also established that the during the thermal cyclingtreatment steel Č4732
behaves in the same way whether it hadsmall or large initial grain size.
Keywords: Steel, Heat Treatment, Thermal Cycling Treatment
- Type of paper
: Paper in journal
Title: Srengthening of steel Č1530 by thermal cycling trearment
- Authors:
- Smoljan, Božo (108601)
Journal: Zbornik radova Tehničkog fakulteta Rijeka
Number: 1
ISSN: 0533-281
Volume: 12
Year: 1992
Pages: from 167 to 176
Number of references: 12
Language: hrvatski
Summary: The possibility of strengthening of steel Č1530 by
thermal cycling treatment has been investigated.
The strengthening of steel Č1530 by thermal cycling treatment has
been estimated on the basis of the constructive strength value,
i.e. on the basis of the steel resistance to brittle fracture and
to excessive plasti deformation. Better results of constructive
strength are obtained by the appropriate thermal cyclingtreatment than by
quenching and tempering of steel Č1530.
Keywords: steel, heat treatment, thermal cycling treatment
- Type of paper
: Paper in journal
Title: Contribution to Numerical Estimating of Hardnes
Penetration Depth in Steel Specimen
- Authors:
- Smoljan, Božo (108601)
Journal: Strojarstvo
Number: 3,4
Volume: 36
Year: 1994
Pages: from 151 to 155
Number of references: 12
Language: hrvatski
Summary: The model of hardness penetration depth estimation in steel
specimen has been established. The hardness depth has been estimated on the
base of cooling time on specimen points. The cooling time on specimen
points has been estimated by control volumes method.
The hardness of all control volumes has been estimated by
conversion of cooling time results to a Jominy test results.
The numerical results of hardness depth have been compared with
the results of experimentally estimated hardness depth.
Keywords: Hardenability, Mathematical Modeling, Steel
- Type of paper
: Paper in journal
Title: Mathematical Modeling of the Drawing Process With the Aim
of Minimiying tool Loading
- Authors:
- Jurković, Milan
Journal: Zbornik radova Tehničkog fakulteta Rijeka
Volume: 14
Year: 1994
Pages: from 31 to 42
Number of references: 16
Language: engleski
Summary: This paper presents theoretical and experimental research
on the dependence of the minimization load on the configuration of the tool
work zone and the contact quality.
Theoretical methods of load determination are based on a certain number of
processes simplifications that reflect on the accuracy of the results.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Smoljan, Božo (108601)
- Editors
- Cebalo, Roko
Proceedings title: Suvremeni trendovi proizvodnog strojarstva
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 95 to 102
Meeting: Suvremeni trendovi proizvodnog strojarstva
Held: from 05/25/92 to 05/27/92
Summary: On the basis of steel Č4732 properties analysis and the
analysis of existing possibilities of thermal cycling treatmentthe basic
thermal cycling treatments of steel Č4732 have been
established. The combined thermal cycling treatment proved to be
the most convenient one for the purpose of strengthening of steel
Č4732.
Keywords: Steel, Thermal Cycling Treatment
- Type of paper
: Paper in proceedings
Title: Thermal Cycling treatment of Steel for Quenching and
Tempering
- Authors:
- Smoljan, Božo (108601)
- Editors
- Kuljanic, Elso
- Smoljan, Božo (108601)
Proceedings title: Advanced Manufacturing Systems and Technology
Language: engleski
Place: Udine, Italija
Year: 1992
Pages: from 160 to 168
Meeting: Third International Conference on Advanced Manufacturing Systems and Technology AMST'93
Held: from 04/26/93 to 04/27/93
Summary: The possibility of strengthening of steel 42CrMo4 by
thermalcycling treatment has been investigated. The strengthening ofsteel
42CrMo4 by thermal cycling treatment has been estimated on the basis of the
constructive strength value, i.e. on the basisof the steel resistance to
brittle fracture and to excessiveplastic deformation. Better results of
constructive strength areobtained by the appropriate thermal cycling
treatment than byquenching and tempering of steel 42CrMo4.
Keywords: Steel, Heat Treatment, Thermal Cycling Treatment
- Type of paper
: Paper in proceedings
Title: Mathematical Modeling of Hardnes Penetration Depth
- Authors:
- Smoljan, Božo (108601)
- Editors
- Stupnišek, Mladen
Proceedings title: International Conference of Heat Treatment
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 27 to 34
Meeting: International Conference on Heat Treatment
Held: from 05/23/94 to 05/25/94
Summary: The model of the steel specimen quenches hardening has been
represented. Temperature changing on specimen points has been estimated by
control volumes method. The cooling time has been determined on the bases
of temperature rates.
The hardness of all control volumes has been estimated by
conversion of cooling time results to a Jominy test result.
The numerical results of hardened depth have been compared with
the results of experimentally estimated hardened depth.
Keywords: Heat Treatment, Hardening, Mathematical modeling, Hardnes Penetration Depth
- Type of paper
: Paper in proceedings
Title: Contribution on Investigation of the Thermal Cycling
Treatment of Steel
- Authors:
- Smoljan, Božo (108601)
- Editors
- Bell, Robert
Proceedings title: 9th International conference on Heat treatment
Language: engleski
Place: Nice, Francuska
Year: 1994
Pages: from 38 to 44
Meeting: 9th International Conference on Heat Treatment and surface Engeniring
Held: from 09/25/94 to 09/29/94
Summary:
The possibility of strengthening of steel for quenching and
tempering by the thermal cycling treatment has been investigated.
Better mechanical properties are obtained by the appropriate thermal
cycling treatment than by the quenching and tempering of
structural steel for quenching and tempering.
Steel has a finer prior austenitic structure after the thermal
cycling treatment. That is the fundamental reason for increasing its
constructive strength as opposed to quenched and tempered steel.
Keywords: Steel, Quenching and Tempering, Thermal Cycling Treatment, Mechanical Properties, Structure Reffining
- Type of paper
: Paper in proceedings
Title: The Calibration of the Mathematical Model of Steel
Quenching
- Authors:
- Smoljan, Božo (108601)
- Editors
- Salehi, B.
Proceedings title: 5th World Seminar on Heat Treatment and Surface Engineering
Language: engleski
Place: Isfahan, Iran
Year: 1995
Pages: from 62 to 68
Meeting: 5th World Seminar on Heat Treatment and Surface Engineering
Held: from 09/26/95 to 09/29/95
Summary: Curves of temperature dependency of heat transfer
coefficients
have been calibrated on the base of Craft - Lamont diagrams, for
quenchant with Grossmann's value H=0.2 to 2.
Applicability of calibrated heat transfer data has been experimentally
tested for the steel specimen with complex form. Differences between
experimentally and numerically estimated hardness penetration depth has
been negligible.
Numerical simulation of quenching, with application of calibrated
heat transfer data, is a generalized way of simulation and lar-
gely applicable in design offices.
- Type of paper
: Paper in proceedings
Title: The Investigation of the Temperature Distribution on the
Contact Surface During Cold Drawing of Low Carbon Steel
- Authors:
- Jurković, Milan
Proceedings title: YUTRIB
Language: hrvatski
Place: Kragijevac, ...
Year: 1991
Pages: from 127 to 132
Meeting: YUTRIB
Held: from 03/23/91 to 03/25/91
Summary: By means of specially constructed measuring devices, an
experimental investigation of the temperature distribution on the contact
zone during the cold drawing of low carbon steel has been done.
The temperature changes as a function of the deformation degree and
deformation velocity and type of grease, has been determined. The used
experimental method was sufficiently accurate.
- Type of paper
: Paper in proceedings
Title: Identification and Optimiyation of the Tribological
Processes During Processes of Metal Deformation
- Authors:
- Jurković, Milan
Proceedings title: YUTRIB 91
Place: Kragijevac, ...
Year: 1991
Pages: from 25 to 31
Meeting: YUTRIB
Held: from 03/23/91 to 03/26/91
Summary: The base of tribology in metal forming has been presented.
By means of special measuring instrument experimental research of a
mechanical load on a contact surface was realized.
The described experimental-analytical method shows that the contact normal
pressure and frictional force can be exactly determined on a contact
surface of tool and work piece.
- Type of paper
: Paper in proceedings
Title: Mathematical-experimental Modeling of the Tribological
Processes in Metal Working
- Authors:
- Jurković, Milan
Proceedings title: KoREMA Proceedings 40
Language: engleski
Place: Zagreb
Year: 1995
Pages: from 504 to 601
Meeting: 40th ANNiversary Conference KoREMA
Held: from 04/23/95 to 04/23/95
Summary: The experimental-mathematical method shows that normal
contact pressure and specific frictional force can exactly be determined on
the contact surface of tool and workpiece.
The specific frictional force is significant for the proper tool
construction, stagnation time reduction in the working process and less
tool and energy consumption.
- Type of paper
: Paper in proceedings
Title: The Application Mathematical Model of Multifactorial
Experiment in Machining Operations
- Authors:
- Jurković, Milan
Proceedings title: 12th International Conference BIAM94
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from c-9 to c-14
Meeting: 12th internatinal Conference BIAN94
Held: from 05/23/95 to 05/26/95
Summary: The paper gives an analysis of multifactorial experiment
applications in machining operations. The mathematical model is obtained by
using the concepts on design of experiments.
The application of described procedure is illustrated by an adequate
example.
- Type of paper
: Paper in proceedings
Title: Adaptive Controled Flexible Machining System for Profile
Cold Rolling/
- Authors:
- Jurković, Milan
- Editors
- Katalinić, Branko
Proceedings title: Inteligent Manufacturing Systems
Language: engleski
Place: Krakov, Poljska
Year: 1995
Pages: from 243 to 245
Meeting: 6th International DAAAM Symposium
Held: from 10/26/95 to 10/28/95
Summary: Flexible machining system (FMS) of profiles manufacturing
is still insufficiently researched, developed and applied in practice.
Consequently, the paper is a contribution to research and development of a
new version of processing system for rolling which carried out in modular
technic design and flexible automation control.
- Type of paper
: Paper in proceedings
Title: Sensors for the Measurement of the Parameters Loads of
Tools in the Forming Processes
- Authors:
- Jurković, Milan
- Editors
- Katalinić, Branko
Proceedings title: Inteligent Manufacturing Systems
Language: engleski
Place: Krakov, Poljska
Year: 1995
Meeting: 6th International DAAAM Symposium
Held: from 10/26/95 to 10/26/95
Summary: The development and application of highly automatic
machining systems (CNC machine tools and FMS) and modern tools make
possibly remarkably reduction of auxiliary time and increasing of working
time part.
Therefore, in this article a new method for determining of the parameter
loads of tools in plastic metal
working processes is presented.
- Type of paper
: Paper in proceedings
Title: New Flexible Production Systems for Rolling of High
Accuracy Machining
- Authors:
- Jurković, Milan
Proceedings title: 12th International Conference BIAM94
Language: hrvatski
Place: Zagreb
Year: 1995
Pages: from D-21 to D-26
Meeting: 12th internatinal Conference BIAN94
Held: from 04/25/95 to 04/26/95
Summary: For the purpose of economy of manufacturing by the rolling
process, research work focused on posibilities of development and
application of machining centre with high degree of automation and high
machining accuracy has been done.
- Type of paper
: Paper in proceedings
Title: Influence of the State Stress Index on the Formability
Limit of Metals
- Authors:
- Jurković, Milan
- Smoljan, Božo (108601)
- Editors
- Vrbky, J.
Proceedings title: Form 95
Language: engleski
Place: Brno, ...
Year: 1995
Held: from 09/13/95 to 09/14/95
Summary: Procedure of determination of a formability limit is very
complex and requires a precise identification of stress and strain state in
the crack zone. The formability limit of metal materials is one basic
indicator of optimal technology of deformation processing. This research
shows that the potentness of metal formability substantially increases
using the optimal scheme of principal stresses components.
Keywords: Formability Limit, State of Stress, Deformation Modeling
