Materials Literature
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The evolution of structure of 0. 78C-1. 03Cr eutectoid pearlitic steel Φ8 mm x 45 mm sample with two pass equal channel angular pressing at ambient temperature has been studied by scanning, transmission electron microscope and X- ray diffraction method. Results showed that after one pass equal channel angular pressing…
The effect of titanium content on mechanical properties of 14～20 mm hot rolled plate of Q345A steel (0.08~0. 10C,1.19～1.46Mn,0.017～0.029Nb,0.02～0.08Ti) has been studied. Results showed that as Ti=0.02%, the strength of steel plate was not obvious change,as Ti content was0.02～0.04%,with increasing Ti content the streng…
The effect of 0.01%~0.22%V on relax resistance,mechanical properties and precipitated phase of Si- Mn spring steels(0.34~0.53C,1.06~1.24Si,1. 17~1.36Mn)with 870～900℃ normalizing,900~920 ℃ quenching and 400~460 ℃ tempering has been studied by Bauschinger test and transmission electron microscope examination. Results sh…
The parameters of heating,rolling and cooling of steel F45MnV steel(0.44C,1. 18Mn,0. 10V)during hot rolling have been simulated by thermal simulator Cleeble- 1500.It wag found by test that with heating temperature increasing from 950 ℃ to1100 ℃ the austenite grain size in steel increased from 25.7μm to 84.3 μm;with he…
The strength and plasticity of (mm) 150 x 150, 180 x 220 and 220 x 300 concasting billet of gear steel 20CrMnTiH at 600 ~ 1 300 °C have been studied by Gleeble-1500 thermal simulation machine. Test results showed that the actual strength at fracture Skof three size of billet at 650 ~ 950 °C was very low, at 950 ~ 1 20…
The volume of melt chamber of vacuum induction degassing and pouring funace(VIDP) is less than that of conventional vacuum induction melting furnace(VIM)with same capacity to reduce vacuum pumping time and melting time. Small melt chamber is available to control pressure and temperature,recover volatile elements and p…
The compound,size,amount and distrbution of non-metallic inclusion in grade A hull plate steel (0. 16C,0.21Si,0.50Mn,0.011P,0.027S)produced by 30 t LD converter -ladle argon stiring- 150 mm×1050 mm slab concasting flowsheet have been analyzed and studied by electrolytic extraction analysis and scanning electron micro…
Main advances in 0.03～0.05C,2.80～3.40Si cold rolled grain-oriented electrical steels are presented including obvious improvement of magnetic properties by improving texture, decreasing thickness of sheet and using magnetic domain refining techniques; research on mechanism of secondary recrystallization texture selecti…
The effect of quenching and tempering temperature of Φ21 mm finished products rolled by 160 mm×160 mm concasting billet of spring steel 60Si2CrVAT quenched at 890~930 ℃ and tempered at 400～440 ℃ on structure and mechanical properties of steel has been tested. Results showed that the tensile strengh of tempered spring…
Based on dynamic finite element method, a finite element model of cooling water flow in cavity of water cooling carriage for Consteel EAF has been established to carried out the flow velocity analysis and thermal analysis on cooling water in water cooling carriage. Research results show that the dead space of water fl…
The Nb-Ti microalloying undersea linepipe steel HSL450S(0.06C,0.40Cr,0. 15Mo,0.02Ti,0.05Nb) has been developed by 90 t EBT arc funace- 100tLF+VD-wire feeding - Φ220 mm CC flow sheet.It was obtained by analyzing 30 heats that [O] was 35.2×10-6and [N] was78.8×10-6.The structure of steel was tempered bainite-pearlite + p…
The 180 mm ×1200 mm slab of atmospheric corrosion-resisting steel 09CuPTiRE(≤0. 12C,0.06~ 0. 12P,≤0.020S,0.25～0.50Cu,≤0.03Ti,0.01～0.04RE)is produced by 80 t converter-ladle argon stirring-vertical-bending slab caster process. With using improved process measures such as controlling Cu/Ti≤20,P content ≤ 0. 11%,RE conte…
The continuous cooling transformation(CCT)curves,structure and phase transformation of quality spring steel 60Si2CrVAT with different finishing rolling temperature and cooling rate have been examined and studied by Gleeble-1500 thermal mechanical simulator,optical microscope and transmission electron microsope. Result…
The Φ160 mm non-quenched-tempered steel S38MnSiV(0.38~0.45C,0.55~0.75Si,1.40～1.55Mn, 0.08～0. 15V,0.020~0.050S,≤0.025P) has been developed by 30t EBT EAF-40tLF+VD-3. 16tingot-800/ 650×4 mill flow sheet. Examination results showed that he oxygen content in finished products was (8～13)×10-6nitrogen content(128～186)×10-6a…
The structure and properties of electroslag remelting steel Cr14Mo4(1.03C,14.36Cr,3.98Mo)Φ22 mm hot rolled products annealed at 750~950 ℃,quenched at 950～1200 ℃ and tempered at 450～550 ℃ have been studied. Results showed that HB hardness value of steel annealed at(890±20)℃ was 207~255;structure of steel quenched at 11…
The effect of two processes of calcium treatment: two step process (LF + Ca-Si wire feeding - VD + Ca- Si wire feeding) and one step process (LF - VD + Ca-Si wire feeding) at Xiangsteel on morphology of inclusions and mechanical properties of Nb-Ti microalloying grade E hull steel (0. 10%C) has been studied by thermod…
The morphology and component of insulating coating of non-oriented silicon steel before and after stripping have been analyzed and studied by established adhesive model of thick coating,electron probe micro analyzer(EPMA)and glow discharge spectroscopy(CDS).Results showed that the adhesion mechanism of insulating coat…
The 0Crl8Ni9 clean stainless steel is produced by pretreated hot metal - 75 t K-OBM-S - VOD - LF flow sheet. During LF refining for steel 0Cr18Ni9 as bottom argon blown stirring power decreased from 20 ~40 W/t to 13 ~21 W/t with feeding available Ca-Si wire according to Ca/Al≈0.1, the oxygen content and Al2O3content i…
Phase transformation of 0. 13Nb microalloying low carbon steel with deformation in non-crystallization temperature zone(as deformation≥50%,crystallization occurred)and continuous cooling with cooling rate0.1～50 ℃/s has been studied by using thermecmastor-Z thermal simulation test machine and the effect of thermal defo…
The second phase particles in simulated weld(H08C weld wire-0.06C,1.44Mn,0.24Mo,0.04Ti, 0.01V)and coarse grained heat affected zone(CGHAZ)of Ti-V-Nb microalloyed steel(0.08C,1.29Mn,0.02Ti, 0.04V,0.04Nb)have been studied by using carbon extraction replica technique.Results showed that size of most second phase particle…