Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Mao-qiu Wang"'
Publikováno v:
Journal of Iron and Steel Research International. 28:488-495
In order to research the effect of microalloying Nb, the microstructure and heat treatment distortion of case carburizing steels with and without Nb addition are compared. Results show that a uniform and fine prior austenite grain size was obtained f
Publikováno v:
Journal of Iron and Steel Research International. 26:856-865
Hot deformation behavior of an Fe–20Mn–19Cr–0.5C–0.6N high-nitrogen austenitic steel has been studied by isothermal compression tests in deformation temperature range of 800–1200 °C and strain rate range of 0.01–10 s−1. Results indicat
Publikováno v:
Journal of Iron and Steel Research International. 23:711-716
Rolling contact fatigue (RCF) properties of SAE 8620 steel after case carburizing have been investigated under two contact stresses of 4.0 and 5.5 GPa. Results show that the RCF life ranges from 2.5 × 106 to 3 × 107 cycles under the contact stress
Publikováno v:
Journal of Iron and Steel Research International. 21:951-955
Hydrogen plays an important role in the formation of quench cracks of structural steels. To clarify hydrogen absorption and desorption during heat treatment of AISI 4140 steel, thermal desorption spectrometry (TDS) analysis was carried out for the sp
Publikováno v:
Journal of Iron and Steel Research International. 20:140-145
High temperature carburization is becoming more and more attractive because it can remarkably reduce processing time and increase productivity. However, the commonly used gear steels which are microalloyed by Al are not suitable for high temperature
Publikováno v:
Science China Technological Sciences. 55:1814-1822
The mechanical properties dependence on the microstructure was reviewed and analyzed, and the ultrafine grained duplex microstructure of BCC matrix and large fractioned austenite was given as one of the optimum structures to develop the third generat
Publikováno v:
Science China Technological Sciences. 55:1844-1851
The microstructure of steels treated by QP the fresh martensite formed at the final quenching step looks like ‘blocky’ type phase, and the retained austenite is mainly located on the packet boundary and initial austenite grain boundary. The inhom
Publikováno v:
Journal of Zhejiang University-SCIENCE A. 12:171-176
In order to locate a reasonable heating system, the austenite grain growth behavior of Nb microalloyed medium carbon steel has been experimentally studied at various austenitizing temperatures and for different holding times. It is indicated that aus
Publikováno v:
ISIJ International. 51:651-656
The microstructural evolution of Fe–0.2C–5Mn steel during intercritical annealing with holding time for up to 144 hours was examined by TEM and STEM. It was demonstrated by TEM that the martensite lath structure gradually transformed into a lamel
Publikováno v:
Journal of Zhejiang University-SCIENCE A. 11:776-781
The influence of direct quenching (DQ) on microstructure and mechanical properties of 0.19C-1.7Si-1.0 Mn-0.05Nb steel was studied. The microstructure and mechanical properties of reheat quenched and tempered (RQ&T) steel plate were compared with thos