Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
According the issue of Al-CaO complex deoxidizer for clean steel easily crushing during process of falling from 10 meters high burden bin led to low utilization, increase of cost and dust pollution in situ, the effect of adding epoxy resin, modified starch etc binders with 0-2.5% content in Al-CaO complex deoxider fin…
The optimization of flow control device in 38 t expansion tundish from original 29 t for casting 250 mm X 2 000 mm slab at steelworks has been carried out by numerical simulation. The effect of number and position of dam and weir on flow field and residual time distribution ( RTD) curves of liquid in tundish has been…
The distribution of TiN inclusions in 200 mm x 1 260 mm cast slab of ultra-pure ferrite stainless steel B439M (/%： 0.01C, 0.40Si, 0.25Mn, 0.020P, 0.001S, 17.50Cr, 0.15Ni, 0.20Ti, 0.0080N, 0.0040N) has been studied by automated scanning electro microscope Aspex. Results show that due to decrease in cooling rate from su…
The test and analysis on φ26 mm round products rolled from 2. 3 t bearing steel GCH5 electroslag ingot remelting with (/% ) : 45CaF2l0CaO, 40Al2O35MgO slag series are carried out. Results show that after electroslag remelting (ESR) the burning loss of Al and Si and oxygen content increase in top of ingot are larger th…
The crack phenomenon of cold-drawn Φ12 mm bar of low-carbon high-sulphur free cutting steel (/% : 0.07 C, 1.24Mn, 0.06P, 0.39S) produced by 100t BOF-LF-165 mm x 165 mm casting billet -Φ14 mm hot-rolled bar-cold drawn to Φ12 mm rod process has been systematically analyzed to get the main cause of cold-drawn rod longitu…
The dephosphorizing effect of 60 t converter on 0. 03% ~ 0.27% C, 0. 012% ~ 0. 024% P, 0. 023% ~ 0. 036% S liquid at 1580 ~ 1680 ℃. by limestone replacing lime as slag material is tested and studied to compare the slagsteel phosphor partition ratio by limestone as slagging material with that by lime as slagging materi…
The evolution of inclusions in steel Q235, SPA-H and DC01 treated by feeding silicon-calcium wire and calcium-aluminium wire after LF refining in metal pretreatment-150 t BOF-ladle argon blowing-LF-CSP flowsheet and the effect of refining slag on inclusions are studied by thermodynamic calculation and scanning electro…
Based on w inside-laser coaxial powder feedingM technology the surface of steel 40CrMo (/% : 0. 40C,1. 20Cr, 0. 25Mo) is laser-clad with iron-base alloy powder (/% : 0. 60C, 15. 25Cr, 1. 1 ISi, 1. 85Mo) to increase surface hardness and get idea wear resistance. The hardness HV0 2 value of steel 40CrMo is 250 while the…
The Production flowsheet for steel 12Cr2Mo, 14CrMo and 15CrMo is metal-110t BOF-LF-VD-300 mm x (1700-2400) mm slab CC process. The effect of factors including carbon content in steel, Mn/S, mold inverted taper and immersion nozzle insertion depth on casting slab longitudinal cracks is analyzed. By optimizing the mold…
The flowsheet for steelmaking of 280 mm x 325 mm casting bloom of steel 55SiCr (/% : 0.55C, 1. 42Si, 0. 67Mn, 0. 008S, 0. 67Cr) is 80 t BOF-LF-RH-CC process. With during BOF tapping adding Al, ferrosilicon and refining slag, controlling slag basicity R (CaO/SiO2) about 2. 0, RH refining for ≥ 20 min, soft blowing stir…
The effect of process of warm-forging at 880 ~ 930 °C on growth of austenite grain of gear steel 20CrMnTiH3 is analyzed by examination of physicochemistry and original material austenite grain size to get that the austenite of steel is easy abnormally coarsening during carburizing process at 890 ~ 920 °C after warm-fo…
The 325 mm x 280 mm electrode of superalloy 825 ( /%： < 0. 01C, 0. 21 Si, 0. 40Mn, 0. 020P,0. 003S, 22. 5Cr, 39. INi, 3. 0Mo, 2. ICu, 1. 17Ti, 0. 17Al) is remelted by protective gas drawing-type electroslag rapidremelting to 160 mm x 160 mm 1. 8 t ingot. Effect of adding TiO2TiO2-MgO or TiO2-SiO2in base slag CaF2-CaO-…
The production flowsheet of ø9~ ø12 mm wire rod o£ spring steel 60Si2MnA is 100 t BOF-LF-VD-150 mm x 150 mm billet casting-high speed wire rolling process. The decarburization mechanism is discussed and the effective factors on decarburization are analyzed. With the process measures including suitable decreasing the t…
In order to reduce inclusions in steel and modify inclusions to prevent nozzle clogging during casting process, the equilibrium theimodynamic calculations of Ca-Al, Al-O, Al-S and Ca-S, and the analysis of oxygen and nitrogen of 5 heats 100 t LF of cold heading steel SWRCH22A (/% ： 0.18 ~0. 20C, 0. 44 ~0. 62Si, 0. 85…
The liquid melted in a medium frequency induction furnace by parent metal of bearing steel GCrl5 through a guided tube enters in spraying room and the metal strand is sprayed by inert gas to liquid droplet with micrometer size and deposited at collector to form a deposited billet with diameter 130. 28mm and center thi…
Tested 0.5 ~0.7Cr steel for bucket blade (/% : 0.22 ~ 0.30C, 0.25 ~ 0.45Si, 0.95~1.20Mn, 0.006 ~ 0.009P, 0.008 ~0.010S, 0.5 ~0. 7Cr, 0.015 ~0. 065Nb, 0 ~ 0. 040Ti) is melted by a 50 kg vacuum induction furnace and hot-rolled to 16mm plate with finished rolling temperature 850 ~ 900 °C , air cooling. The effect of Nb-T…
The continuous cooling transformation ( CCT) curves of high carbon alloy steel 75Crl (/% : 0. 75C, 0. 27Si, 0. 85Mn, 0. 010P, 0.003S, 0.60Cr) and the effect of cooling rate on phases and structure of steel are obtained by Gleeble-3800 thermal simulation testing machine to carry out first reduction 25% deformation with…
The effect of 6-strand asymmetric 40 t tundish original no-adding weir, adding weir, and adding weir + dam on amount and size of inclusions in Φ5. 5 mm coil of 82A tire cord steel has been studied by commercial test. The results of metallographic examination and electrolytic analysis of inclusions show that with the t…
Since the phosphorus content in hot metal at Shuisteel is up to 0. 104% ~ 0. 157% , the 30#~ 80#SWRH82B, ER70S-6, SWRCH22A and 40Cr etc high quality steels are melted by 100 t top and bottom combined blown converter using double-slag operation to reduce the phosphorous content in liquid, in this case the metal consump…
The tested steel 1 ~2Crl3Mn9Ni4 with different nitrogen content (/% : 0. 08 ~0. 18C, 0. 17 ~0. 34Si, 8. 11 ~9. 27Mn, 0. 008 ~0. 028P, 0. 007 ~0. 032S, 12. 57 ~ 13. 34Cr, 4.05 ~4. 65Ni, 0 ~0. 34N) is melted by a 25 kg vacuum induction furnace adding chromium nitride in atmosphere or argon atmosphere. The test steel is…