Now showing items 1-10 of 235
Mössbauer spectroscopy analysis on a tempered martensitic 9% Cr steel
We report an analysis by means of Mössbauer spectroscopy, on a 9% Cr steel submitted to a tempering process at 780°C. Spectra of several samples with different tempering times obtained at room temperature are fitted, and ...
Efeito da temperatura e tempo de austenitização nas transformações de fase da liga 13Cr2Ni0,1C
New classes of martensitic stainless steels, with low carbon levels, have been developed aiming to meet the needs of the petroleum industry segment. However, their use has been restricted due to the fact it is a recent ...
Evolution of Martensitic Microstructure on Carbon Steel Tempered at Low Temperatures
This work presents the microstructural changes of a carbon steel during tempering at low temperatures (first stage of tempering), and its effects in the second and third stages. These changes are determined by internal ...
Influencia da Carga no Comportamento quanto ao Desgaste de um Aco ABNT-1020 Bifasico Revenido a 450°C
The wear rate of the dual-phase steel ABNT-1020 tempered at 450°C sliding against cemented steel ABNT-1020 in function of load value is investigated in wide load range. The alteration in behavior of this function at ...
Influence of phosphorus content and quenching/tempering temperatures on fracture toughness and fatigue life of SAE 5160 steel
(ABM, ABC, ABPol, 2010)
This study investigates the influence of quenching/tempering temperatures on the fracture toughness and fatigue life of SAE 5160 steel, considering different phosphorus contents. Quenching and tempering treatments were ...
Austenite transformation and age hardening of HSLA-80 and ULCB steels
(Elsevier Science SaLausanneSuíça, 2004)
Effects of cryogenic and stress relief treatments on temper carbide precipitation in AISI D2 tool steel
The effects of cryogenic and stress relief treatments on temper carbide precipitation in the cold work tool steel AISI D2 were studied. For the cryogenic treatment the temperature was −196°C and the holding time was 2, 24 ...
Characterization of a new Fe-C-Mn-Si-Cr bearing alloy: tempered martensite embrittlement susceptibility
(New York, 2014)
Bearing steels containing 1% C and 1.5% Cr have been the usual material of choice for machine components submitted to rolling and contact fatigue, for more than a century. As a rule these steels are quenched from the ...
Effect of post-weld heat treatments on SMSS deposit mechanical properties of supermartensitic stainless steel deposit
Supermartensitic stainless steels have good weldability and adequate tensile property, toughness and corrosion resistance. They have been developed as an alternative technology, mainly for oil and gas industries. The final ...