Materials Literature
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The distribution of silicon at cross section of cathode (/mm) 20 X 20 X 0. 5 sheet of 1. 6Si non-oriented cold rolled silicon steel after electro-deposit treatment by NaCl-KCl-NaF-SiO2molten salt with current intensity 50 mA/ cm2electro-deposit pulse current positive-negative ratio 9：1 at 750 ~ 850 ℃ for 60min has bee…
The influence of floatation velocity ( Stokes velocity, 0.1-0.5 m/s) on separation and removal of 50-200 μm inclusions is studied by established, a moving model of inclusions at steel-slag interface and in liquid metal and slag layer continuous zone near the interface. Study results show that with increasing floatatio…
The flow sheet for production of 150 mm x 150 mm casting billet of stainless steel 2Cr13 (/% ： 0. 16 ~ 0.25C, ≤1.0Si, ≤1.0Mn, ≤0.035P, ≤0,030S, 12. 0 - 14. 0Cr) is hot metal pretreatment-50 t AOD-LF-CCM, slow cooling, annealing and grinding. Commercial pilot production results show that with the technology measures in…
The forming process, ingredient and structure of final slag and slag skin during electroslag remelting (ESR) process of 7. 6 t ingot of steel MC5 with 310 kg ANF-6 slag (/% ：69.14CaF229.51Al2O30. 54CaO, 0. 83SiO2) are analyzed and examined. Results show that after ESR the CaF2and Al2O3content in final slag decrease ob…
Based on the original 5 t (real 5. 15 t) octagonal ingot mould, with increasing the height of mould from original 1505 mm to 1840 mm, decreasing the taper in the mold walls from 4. 56% to 3. 64% , modifying the hot top location from outside type to inside type and decreasing the ratio of liquid steel in hot top from 1…
According to the prototype of a 100 t ladle at steelworks and based on geometric similarity principle, a water model with model and prototype ratio 1:3.5 is established. The effect of different blowing position of single nozzle and double nozzles corresponding real gas blowing rate 31 L/min to 237 L/min on conditions…
The influence of oxygen pressure (11.46 x 105Pa and 6. 88 x 105Pa) and oxygen lance level ( 1.2-1.5 m) on jet characteristics and impact of liquid surface of 100 t top-blown oxygen converter at steel words is studied by using Fluent fluid software and standard k-e turbulence model. Results show that with increasing ox…
The effect of four kinds of baffle structure- U type baffle with guide flow hole angle 30°, and V type baffle respective with guide flow hole angle 20°, 25° and 30° on liquid flow characteristics of liquid in a 46 t T type tundish for casting double strands Φ800 mm round bloom are respectively studied by numerical sim…
With established argon bottom blown ladle three dimensional non-stable three-phase flow math model, Fluent software and Simple calculation method the shield slag flow characteristics during ladle refining process in bottom argon blown are studied and the effect of gas flow rate 200-3500 L/min of nozzle with diameter 0…
The test of grooved roll pass rolling process to simulate steel works mill with roll diameter 1 200 mm, length of roll body 2 200 mm, maximum rolling force 25 000 kN and mill power 1 000 kW by laboratory mill with roll diameter 130 mm, length of roll body 265 mm, maximum rolling force 150 kN and mill power 5. 5 kW is…
The effect of decarburization process, deoxidizing, alloying, blowing oxygen and adding aluminium and non-operating factors on liquid temperature during RH-MFB refining process is analyzed and studied, and a prediction model for refining liquid is established. Verifying results by continuous-refining 10 heats 270 t ul…
According to the quality issues including finger-mark proofing firm thickness un-uniform, roll marks sensitiveness to form marks etc. in production of chromium-free passivating and finger-mark proofing cold-rolled 0. 3 〜2. 5 mm sheet of DX15D +Z plain carbon steel at Shougang Cold Rolling Sheet Co, the process control…
Simulation test on interaction between jet flow and bath in 180 t top and bottom combined blowing converter has been carried out by a water model with geometric similarity ratio 1:10 to study the effect of gas flow rate (38 ~42 m3/h) on mixing time with optimum lance position (150 mm) and the effect of coherent jet fl…
The electroslag remelting (ESR) process of steel mainly occurs in formation period of electrode-end melting drop, and the molten steel is pured and cleaned by slag washing effect as the inclusions in steel are absorbed and solved by slag, while the interfacial tension of slag-steel-inclusion closely affects this proce…
The welding test on 5 mm 3Cr13Mo martensite heat resistant steel plate (/% ： 0. 28C, 0. 8Si, 0.36Mn, 0. 030S, 0.029P, 12. 10Cr, 0. 57Mo, 0.45Ni) with welding speed 0. 5 ~ 1.2 mm/s, current 150 ~ 200 A, pulse width 3. 0 ~5. 0 ms and frequency 18 ~40 Hz by using a 500 W YAG laser has been carried out, and the temperatur…
The coil of high carbon steel SWRH82B (0. 81%C) is used for pre-stressed wire strands, and the serious net carbides in steel is important factor of wire fracture during cold drawing process. The effect of 150 mm x 150 mm casting billet stacking slow cooling time (0 ~48 h) of steel on carbon segregation in billet and c…
The mechanical properties, structure and precipitates of medium plate 30 mm X 2 500 mm of Ti micro alloyed Q345D steel (/%: 0. 15C, 0.27Si, 1. 36Mn, 0. 019Ti, 0. 011P, 0. 003S, 0. 026Als) produced by hot metal desulphurizing-150 t converter-RH-shielding casting-control rolling and cooling process have been studied. Re…
The effect of adding La alloying methods on yield of La in stainless steel Fe-20Cr-5Al (/%: 0. 004 ~ 0. 006C, 0. 18Si, 0. 08Mn, 20.25 ~ 20. 28Cr, 5. 06 ~5. 17Al) melting by 50 kg vacuum induction furnace + electroslag remelting process has been studied. Results show that with vacuum induction furnace (VIF) melting Fe-…
Based on strong crack sensitivity and requiring high cleanliness of TWIP steel, with analysis and calculation the 14 t TWIP steel ESR ingot (/%: 0. 03C, 2. 88Si, 24. 71 Mn, 0. 021P, 0. 007S, 2. 98Al) has been remelted with 65CaF2-25Al2O3-10CaO slag by AOD refined two 0. 6 m diameter 7. 3 t electrode (/%: 0. 03C, 2. 75…
The production process for 2,5 ~8. 0 mm strip of 304 austenite stainless steel (/%: ≤0. 08C, 18. 00 ~ 20.00Cr, 8. 00 ~ 10.50Ni) is 70 t EAF-70 t bottom blowing GOR converter-LF-slab casting-hot continuous rolling-solid solution treatment-pickling. Based on analysis and examination on bright spots of hot rolled and pic…