Št. zadetkov: 13
Izvirni znanstveni članek
Oznake:
varjenje;zvarni spoji;konstrucijska jekla;materiali;razpokanje;vodik;welding;welded joints;materials;structural steel;cracking;hydrogen;
We study the hydrogen embrittlement and rupture of specimens of high-strength low-alloy steel with weld beads subjected to hydrogenation under the conditions of cathodic polarization. The specimens fail in the heat-affected zone on the boundary between the main metal and the weld bead in the zone of ...
Leto:
2005
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
varjenje;P 91;trdota;udarna energija;hlajenje;welding;hardness;impact energy;cooling;
This paper elaborates results of hardness and impact energy of thermal cycle simulated specimens of high-alloy steel P 91 and their dependence on cooling time from 800 to 500 °C. Results were obtained by measuring hardness HV 1 and by experimental testing of Charpy notched specimens. Metallographic ...
Leto:
2015
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
kaljeno jeklo;popuščano jeklo;toplotna obdelava;udarna energija;čas ohlajanja;preiskava materiala;structural steel;quenched hardness;impact energy;cooling time [Delta]t [sub]8/5;
The paper deals with research into dependence of hardness and impact energy of thermal cycle simulated specimens of fine-grained structural steel S960QL on cooling time from 800 to 500 °C and on tested temperature. Results were obtained by measuring hardness of HV 10 and by experimental testing of C ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
kaljeno jeklo;popuščano jeklo;toplotna obdelava;udarna energija;čas ohlajanja;preiskava materiala;quenched and tempered fine grain structural steel;welding thermal cycle;impact energy;cooling time t8/5;
The paper presents impact energy results of thermal cycle simulated specimens of quenched and tempered fine grain structural steel S960QL. These results are obtained by examining notched Charpy specimens. Upon performed metallographic analysis and measured hardness, total impact energy is separated ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
varjenje;visokotrdnostna jekla;mehanske lastnosti;TStE 420;S960QL;weldabilty;high strength steels;mechanical properties;
The paper presents research of weldability of microalloyed high strength steels TStE 420 and S960QL after weld thermal cycle simulation. Beside mechanical properties hardness and impact strength, the microstructures of characteristic weld thermal cycled structures for both steels are given. The resu ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
varjenje;visokotrdnostna jekla;trdnost zvarov;žilavost;simulacija termičnega cikla varjenja;preiskava materiala;high strength steels;S960QL steel;weldability;weld thermal cycle simulation;hardness;toughness;
This paper presents weld thermal cycle simulation of high strength steel S960QL, and describes influence of cooling time t8/5 on hardness and impact toughness of weld thermal cycle simulated specimens. Furthermore, it presents analysis of characteristic fractions done by electron scanning microscope ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
zvarni spoji;rast zrn;mikrostruktura;mehanske lastnosti;meja tečenja;Parisova krivulja;zaostale napetosti;welded joints;coarse grain HAZ;microstructure;fatigue limit;Paris curve;
This paper presents results of a study on martensitic coarse grain heat affected zone that can appear in welded joints. Mechanical properties of martensitic coarse grain heat affected zone and its microstructure were investigated. Special attention was given to its behaviour during the cycle loading ...
Leto:
2012
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
varjenje;vibracije;odpornost na razpoke;sprostitve napetosti;toplotna obdelava;welding;vibrations;residual stress;heat treatment;
This paper presents research experience related to implementation of vibrations on residual stress relief with the equipment for treatment by vibration method. The paper provides explanation of effects achieved by vibration method when implemented during welding, and elaborates advantages and disadv ...
Leto:
2015
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
mehanika loma;rast razpoke;rast utrujenostne razpoke;utrujenost materiala;visoko legirano kromovo jeklo;preiskava materiala;fracture mechanics;fatigue crack growth;metal forming;rolling process;high chromium steel;
Fatigue crack growth and fracture mechanics analysis of a working roll surface layer material is presented in this paper. The research is done on a hot strip mill working roll where High Chromium Steel is used for roll’s shell material. To obtain corresponding parameters, a rectangular single edge n ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
ekspertni sistemi;ontologija;razvoj novih proizvodov;varjenje jekla;expert systems;new product development;ontology;welding of steels;
Determining the time of execution is very important in the early stages of each project (e.g. making offers, design phase etc.), especially in the stage of planning. This paper presents our approach to estimating the welding time for the purposes of planning the manufacturing processes. The approach ...
Leto:
2017
Vir:
Fakulteta za strojništvo (UM FS)