钢铁钒钛

Discussion on Two-step ApproachTechnology of Smelting FeV80

Sun Zhaohui, Yang Yang jun, Zhang Fan

2010, 31(1): 1-4,23.

Abstract(61) PDF(4)

Abstract:
The possibility of smelting FeV80 by two-step approach was discussed with the application of 650 kVA arc furnace.It is figured out that the key to the problem is controlling the quantity of vanadium-rich slag and the recovery percent of FeV80 is improved to 97.28%, with about 1.8% increase comparing...

Study on the Reaction Mechanism of FeO and V₂O₅

Xie Bing, Cao Hailian, Guan Ting, Diao Jiang, Zhu Xuehui

2010, 31(1): 5-10.

Abstract(52) PDF(1)

Abstract:
On the basis of theoretical analysis, the reaction mechanism of FeO and V₂O₅ is studied by differential scanning calorimetry (DSC), high-temperature quenching and X-ray diffraction analysis (XRD).The experiment results indicate that V₂O₅ is broken down into V₂O₃ and oxygen, FeO is oxidized to Fe₂O₃,...

Research on Oxidation Behavior of CP Titanium TA2

Huang Deming

2010, 31(1): 11-16.

Abstract(201) PDF(7)

Abstract:
Oxidation behavior of commercial titanium TA2 was investigated at various atmosphere temperatures ranging from 650℃ to 1 000℃.The results show that oxidation rate was low at temperature below 800℃, and no peeling of oxide film was observed even holding for 6 hours.However, when atmosphere temperatur...

Study on the Process of Adding TiO₂ and VC Superfine Particle to Molten Industrial Pure Iron

Wang Guocheng, Huang Lang, Fang Keming

2010, 31(1): 17-23.

Abstract(50) PDF(2)

Abstract:
Ingot specimens were obtained by the process of adding individual 80 nm TiO₂ and 1.5 μm VC superfine particles to molten industrial pure iron.Nonmetallic inclusions were extracted from industrial pure iron ingot sample by the electrolytic method in the nonaqueous solution.Morphology, existent state ...

Study on Optimization of LF Argon Blowing at Ladle Bottom by Hydraulic Model

Li Youqi, Yu Huacai, Kou Zhiqi, Zhao Jizeng, Hua Yuancai

2010, 31(1): 24-29.

Abstract(63) PDF(1)

Abstract:
The hydraulic modle of refining LF argon blowing of Benxi Iron and steel Co.was simulated, the effects of optimization argon blowing method on mixing time of molten steel was studied at the same time.In addition, the influence of quantities of gas supply on mixing time of molten steel and inclusion ...

Optimization of Flow Control Devices in Four-strand L Type Tundish by Water Modelling

Li Jingshe, Ma Yu, Chang Guoping, Yang Shufeng, Yang Mingsheng

2010, 31(1): 30-35.

Abstract(57) PDF(1)

Abstract:
A four-strand L type tundish in the steel plant of Xinxing Ductile Iron Pipes Co., Ltd., was studied.On the basis of similar principle, a 1:2 physical model of four-strand caster tundish was built.The simulating study shows that the internal structure of the prototype tundish was unreasonable, exist...

Study of Water Modeling and Metallurgical Effects on Argon Blowing at Tundish Bottom

Cui Heng, Tang Dechi, Bao Yanping

2010, 31(1): 36-39.

Abstract(83) PDF(2)

Abstract:
The influence of argon blowing at tundish bottom on flow field in tundish was studied by water modeling and industrial trial.Water modeling results showed argon bubbling could improve flow field obviously.The optimum argon blowing parameter is that the distance of permeable brick and ladle nozzle is...

Effect of Cold-rolling Reduction on the Microstructure and Texture of a Continuously Annealed Ti-IF Steel

Zheng Zhiwang, Liu Qingchun, Li Xusheng

2010, 31(1): 40-45.

Abstract(67) PDF(1)

Abstract:
According to the process of a continuous hot-dip galvanizing line, salt bath annealing simulation was conducted to study the evolution of microstructure and textures of acommercially produced Ti-IF steel during cold-rolling and annealing by means of optical microscopy and X-ray texture measurement w...

Influence of Isothermal Treatment on Formation of Intra-granular Ferrite in Magnesium Treated High-grade Pipeline Steel

Zhao Hui, Li Zhen, Wu Huibin

2010, 31(1): 46-50.

Abstract(71) PDF(1)

Abstract:
The effect of isothermal treatment at temperatures in the range of 700, 650, 600 and 550℃, and that of isothermal holding time at 600℃ on formation of intra-granular ferrite (IGF) in Mg treated steel were studied by using thermal simulation.Vickers hardness test was also carried out for the steel is...

Effect of Cooling Process on Microstructure and Mechanical Properties of High Strength Fracture Splitting Connecting Rod in Auto Engine

Zhang Xianzhong, Zhou Guifeng, Chen Qingfeng, Xiong Yuzhang, Cai Qizhou

2010, 31(1): 51-55,61.

Abstract(63) PDF(1)

Abstract:
The effect of cooling process on microstructure and mechanical properties of high strength microalloyed medium-carbon steel fracture splitting connecting rod in auto engine was studied using the method of microscope, SEM and TEM, etc.The results show that high cooling rate after finished rolling can...

Research on the Non-metallic Inclusion in 20CrMnTi Steel During the Process of Refining and Casting

Li Junguo, Ceng Yanan, Wang Shuhua, Li Shouzhang

2010, 31(1): 56-61.

Abstract(70) PDF(2)

Abstract:
Use the methods of metallographic observation, sample-electrolysing, SEM and EPMA, the quantity, dimension, morphologies and composition of non-metallic inclusions in 20CrMnTi steel were investigated.It was suggested that lots of non-metallic inclusions were removed from molten steel during LF refin...

Dynamic Soft Reduction Technology for 360mm×450mm Bloom Caster

Chen Yong, Xiao Mingfu, Wu Guorong

2010, 31(1): 62-68.

Abstract(61) PDF(1)

Abstract:
The dynamic soft reduction technology for 360 mm×450 mm bloom caster and its application results at PISCO (Panzhihua Iron & Steel Co.) were presented.Experiment for contrasting process with or without soft reduction for bloom was investigated, in order to analyze the influence of the soft reduct...

Study on Microstructure and Properties of V-Ti-N Weathering Steel

Li Jun, Shi Qingnan, Li Zhengrong

2010, 31(1): 69-73.

Abstract(51) PDF(1)

Abstract:
The dynamic CCT diagrams, precipitated V, grain size and strength for V-Ti-N weathering steels containing 0%V, 0.05%V, 0.10%V and 0.15%V respectively have been examined.In the study, the equipments such as vacuum induction furnace, hot simulation test, ICP emission spectrometer, optical microscope, ...

Analysis of Controlling Oxygen Activity in IF Steel at Blowing End-point of BOF Steelmaking

Feng Jie, Bao Yanping, Yue Feng, Wu Xun, Tang Dechi

2010, 31(1): 74-78,92.

Abstract(72) PDF(2)

Abstract:
Oxygen activity at blowing end-point of BOF steelmaking is the main source of producing non-metallic inclusions and has bad influence on steel cleanliness.In order to increase the control of oxygen content at blowing end-point of BOF steelmaking and improve products' inner quality, experiments are d...

Numerical Simulating for Phase-change Heat Transfer Process of Slag Granule

Xing Hongwei, Wang Xiaodi, Long Yue, Zhang Yuzhu

2010, 31(1): 79-83.

Abstract(78) PDF(6)

Abstract:
The physical and mathematical models of solidification process of spherical molten steel slag granule have been established in this paper.The temperature fields of slag sphere and its outer gas could be calculated through the FLUENT software.Consequently, the solidification time of the slag sphere w...

Study on Acid Evaporation and Valuable Metal Elements Recovery in Stainless Steel Pickling Waste Liquors

Zhao Junxue, He Hui, Ma Hongzhou, Li Xiaoming, Cui Yaru

2010, 31(1): 84-87.

Abstract(58) PDF(1)

Abstract:
Aimed at the disadvantages in relevant techniques of stainless steel pickling waste liquors, evaporation test is carried out to take the rest acid in the waste liquor and recovery the valuable metal element.Different evaporation process with different addtion amount of sulphuric acid are tested.It i...

The Features and Advances of Technology of Zhusteel Electric Shaft Furnace

Zou Anhua, Wang Xinhua

2010, 31(1): 88-92.

Abstract(78) PDF(2)

Abstract:
Through improvements of equipment of an intensive use of oxygen, continuous feed iron etc., and advances of technology such as foamy slag, charge mixture, distribution of charge, end-point control etc., the steelmaking index of Zhusteel electric shaft furnace is among the world's advanced ranks.Its ...

2010 Vol. 31, No. 1