Materials Literature
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With the process measures including arc furnace charging 60% hot metal, changing large amount of slag operation, using low titanium alloy to control arc furnace end [Ti] ≤7 x 10-6using low titanium deoxidizer and alloying materials in LF refining process to control LF end [Ti] ≤30 x 10_6, VD treatment for 27 min, cont…
The steel 0,25C-1.1Cr-O. 7Mn-0. 25Mo-0.05V is melted by 60 t EBT arc fumace-LF-VD-8.4 t ingot casting process. The samples for thermal simulation are cut from 250 mm x 250 mm rolled bloom. The effect of temperature (ambient to 1 200℃) on mechanical properties of steel is tested by Gleeble-3800 thermal-simulated examin…
The pilot production of austenite stainless steel 1Cr18Ni9Ti ［/%: 0. 05 ~0. 09C, 17. 13 ~ 18. 24Cr, 9. 73 ~ 10. 6Ni, 5 X (C-0. 02) ~0. 80Ti］ remelting by 1. 2 t electro-slag furnace in normal atmospheric gas and by 5. 0 t electro-slag furnace in argon shielding atmosphere is carried out to analysis the effect of argon…
With established three-dimensional coupled numerical models for flow and heat transfer of liquid steel in tundish, the effect of immersion depth of long nozzle (100 〜200 mm) on flow field and temperature field of Q235B liquid steel (0. 12% ~0. 20% C) in a 36t tundish during casting of three strands profiled bloom for…
Based on analysis of factors on cutting quality of free-cutting steel AISI 1215, with using the process measures including decreasing carbon content in steel from 0. 094% to 0. 072%, during LF refining using silicon-manganese deoxidizing addition and controlling LF refining end active oxygen content 60 x 10-6- 80 X 10…
The effect of temperature (25 〜200 ℃) on magnetic performance of 33EH sintered NdFeB (/% ：27. 01 Nd, 64. 75Fe, 0. 35Al, 3. 15Dy, 1. 56Co, 2. 27Cu, 0. 90Ga) including residual magnet and magnet loss etc. has been tested and studied. Test results show that with increasing temperature, the residual magnet decreases linea…
The steel 25 CrMpVNi is produced by 120 t EAF-LF-RH degassing-φ600 mm round bloom casting process with adding Al to pre-deoxidize during EAF tapping, and get [ Al ] s 0. 030% and adding lime slagging for pre-refining, adding aluminium shot at surface of refining slag (/% : 53 - 57CaO, 10 -13SiO227 -28Al2O36 - 9MgO, 0.…
The metal rheology of steel 20CrMnTiH during rolling process of 430 mm x 300 mm casting bloom to Φ130 mm steel product is simulated by bloom pin-shooting test. Test results show that in the direction of parallel to pin-shooting, the pin is deformed and extend-spread to flat type, and in the direction of perpendicular…
The metallurgical flow sheet of steel Q345E (/% ： 0. 13 ~0. 17C, 0.24 - 0.28Si, 1. 02 ~ 1. 40Mn, 0. 015 ~ 0,040Al, ≤0. 015P, ≤0. 015S) is 70 t converter-LF-VD- Φ600 mm round bloom casting process. By simulated calculation on solidification in condition with secondary cooling water ratio 0. 08 L/kg and casting speed 0.…
The production flowsheet of test cold-working die flat steel Crl2MolVI (D2) (/% ： 1. 50C, 0. 35Si, 0. 40Mn, 12. 00Cr, 0. 95Mo, 0. 80V) is 30 t EAF-LF-VD-3 t ingot casting-rolling-annealing at 890 °C process. The effect of cross-section size (/mm: 30 x 400, 70 x 360 and 90 X 605) of cold-working die flat steel D2 on th…
The diagnosis of portions in a cable that are severely degraded before breakdown occurs is of prime importance. This paper presents a novel method based on the broadband impedance spectroscopy (BIS) to precisely locate local degradations in a cable and determine their insulation conditions. Firstly, an integral transf…
Bismuth molybdate single-crystallites were synthesized by a simple hydrothermal method at different pH values. The as-fabricated samples were characterized by X-ray diffrac‐ tion (XRD) and transmission electron microscopy (TEM); it has been found that the pH values of the precursors can significantly influence the str…
Abstract The results of electron probe microanalysis of several rock-forming minerals by wavelength-dispersive spectrometry (WDS) and energy-dispersive spectrometry (EDS) are compared, and the metrological characteristics of both methods are studied. The measurements were made with the use of a JXA-8100 (JEOL) microan…
Recently, Cu2-δS and Cu2-δSe were reported to have an ultralow thermal conductivity and high thermoelectric figure of merit zT. Thus, as a member of the copper chalcogenide group, Cu2-δTe is expected to possess superior zTs because Te is less ionic and heavy. However, the zT value is low in the Cu2Te sintered using sp…
Influence of nitrogen doping on structural and optical properties of ZnO nanoparticles has been studied. Undoped and N doped ZnO nanoparticles were synthesized via chemical precipitation approach. The prepared samples were characterized through X-ray diffraction (XRD), Transmission electron microscopy (TEM) equipped w…
\n\t\t\t\t\tTi and Ti-based alloys have unique properties such as high strength, low density and excellent corrosion resistance. These properties are essential for the manufacture of lightweight and high strength components for biomedical applications. In this paper, Ti properties such as metallurgy, mechanical proper…
An efficient method of preparing nanostarch using high-intensity ultrasonic irradiation and acid hydrolysis was discussed. The transmission electron microscope (TEM) showed that the nanosized starch particles were in shape of sphere with the size of 80-120 nm, and their surfaces were rough with many flocci. The Fourie…
Using detailed physicochemical characterization results, we have mapped out the T –x phase diagram of the TlInSe 2 –TlGaTe 2 system. The system has been shown to have eutectic phase relations, with limited solid solubilities of its constituent components. The extent of the TlInSe 2 -based solid solution is 30.0 mol %,…
The effect of impurity Ce on the mechanical and thermal properties of tetragonal ZrO2 stabilized by rare earth element Y (YSZ) have been studied using first principles density functional theory within generalized gradient approximation (GGA) for the exchange correlation potential. The predicted elastic constants indic…
Hybrid nanoparticles were prepared by direct polymerization of methyl methacrylate, vinyl acetate, and styrene monomers onto the unmodified hydrophilic surfaces of 33 nm silica nanoparticles in a semi-continuous soap-free emulsion polymerization at a monomer starved condition. The polymerization was initiated by potas…