Št. zadetkov: 19
Pregledni znanstveni članek
Oznake:
high-strength low-alloy (HSLA) steels;micro-alloying elements;carbides;nitrides;carbonitrides;mechanical properties;
Micro-alloyed, high-strength, low-alloy (HSLA) steels are important structural materials and contain small amounts of alloying elements, such as niobium, titanium, vanadium, and aluminium, which enhance the strength through the formation of stable carbides, nitrides or carbonitrides and have an effe ...
Leto:
2011
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
hot corrosion;biomass combustion;CVD-coatings;deposits;
The corrosion resistance in a biomass-combustion environment was studied for the following materials: cast alloys (Alloy 800, Inconel 617, 1.4910, HCM 12 and P91), Fe-9 % Cr model alloys with and without additions of Al, Si and Mo, and cast alloys coated using the pack-cementation process with Al an ...
Leto:
2006
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
jeklo za kotlovske cevi;izotermno popuščanje;hitrost lezenja;karbidni precipitati;
Analizirana je bila mikrostruktura in določena odpornost jekla X20CrMoV121 proti deformaciji pri pospešenem lezenju pri temperaturi 580°C. Preizkušanci so bili izdelani iz cevi, ki so bile izrezane iz visokotlačnega parnega kotla v TE Šoštanj po eksploataciji več kot 10000 ur. Opredeljen je bil vpli ...
Leto:
1999
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
jeklo;cevi;povišana temperatura;lezenje;
Raziskave na ceveh, ki so bile izrezane iz temperaturo najbolj obremenjenega dela v 325 MW parnem kotlu TE Šoštanj, so pokazale, da je v ceveh , premera 40 mm, izdelanih iz jekla vrste X20CrMoV121, deformacijska odpornost pri 100-urni statični obremenitvi pri temperaaturi 580°C štirikrat manjša na p ...
Leto:
1998
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
creep resistant steel;creep rate;carbide particles;particles spacing;distribution of particles;tempered martensite;
The creep rate dependence of particles coarsening and spacing as well as distribution in analysed considering quoted equations. A simple method for assessment of particle spacing is proposed. Accelerated creep rates at 580 °C for CrV and CrVNb steel after different tempering times at 800 °C and 650 ...
Leto:
2011
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
high-strength;low-alloy (HSLA) steels;microalloying elements;precipitates;mechanical properties;electron microscopy;
In this work, hot-forged, high-strength, low-alloy (HSLA) steels based on the chemical composition 34CrNiMo6 were investigated in order to determine the type of precipitates forming and their effect on the mechanical properties. The individual steels were microalloyed with one of the following eleme ...
Leto:
2010
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
jeklo;deformacija;krivulja tečenja;matematični model;
Natančno poznanje preoblikovalnih sposobnosti jekel, ki jih prikazujemo s krivuljami tečenja, je pri razvijanju tehnologij preoblikovanja velikega pomena. Najpogosteje jih ugotavljamo s preizkusom, ki je po načinu preoblikovanja čim bolj podoben načrtovanemu preoblikovalnemu procesu. Krivulje tečenj ...
Leto:
1998
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
creep resistant steel;welds;creep rate;HAZ;intercritical zone;
Welds are essential parts of tube systems in high temperature power works producing electricaql energy and have a heterogeneus microstructure due to the welding gradient of temperature and cooling rate. A short summary is given of findings related to the creep resistance of welds of creep resistant ...
Leto:
2011
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
steel creep resistance;evolution of microstructure;kinetics of coarsening of carbide particles;isothermal change of hardness from 550 [compositum]C to 800 [compositum]C;
The degradation process of an X20CrMoV 121 steel with an initial microstructure of tempered martensite was investigated. The effects of the change of microstructure type, and of the carbide particles size and distribution were determined. Accelerated creep tests showed that the change of the mode of ...
Leto:
2004
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
temperaturno obstojna jekla;izotermno popuščanje;karbidni izločki;
Leto:
2002
Vir:
dLib.si Digitalna knjižnica Slovenije