钢铁钒钛

ERODING EFFECT OF FIRBRICK BY TiO₂-CONTAINING SLAG

DIAO Ri-sheng, FAN Yun-dong

2003, 24(2): 1-6.

Abstract(16) PDF(1)

Abstract:
Based on the eroding experiments of firebrick by TiO₂-containing slag,the different behaviors of 9 kinds of bricks gives an idea that the eroding difference of the brick depends on its porosity. The microstructure of the bricks eroded gives more detail with EPMA.

EXPERIMENTAL STUDIES ON REDUCING FLUORITE CONTENT OF CALCIUM DEPHOSPHORIZING FLUX

WU Bao-guo, WANG Hai-chuan, ZHOU Yun, WANG Shi-jun, DONG Yuan-chi

2003, 24(2): 7-10.

Abstract(24) PDF(1)

Abstract:
The experimental study on dephosphorization for hot metal pretreatment by CaO-Fe₂O₃-CaF₂ flux was performed. By adding CaO, Al₂O₃ and Na₂CO₃ into dephosphorizing flux, the dephosphorization rate is somewhat increased. The results show that by using Al₂O₃ substituting for some CaF₂, the content of final phosphorus in hot metal can be controlled to be 0.003%~0.006%, and the dephosphorization rate exceeds 90%.

EFFECT OF RE_xO_y ON PHYSICAL-CHEMISTRY PROPERTIES OF MOULD FLUXES

XIANG Song, WANG Yu, XIE Bing

2003, 24(2): 11-13.

Abstract(23) PDF(1)

Abstract:
The composition of mould fluxes was designed according to the principle of regressive orthogonal design, and the effect of RE_xO_y on viscosity and melting temperature of mould fluxes have been investigated. The results indicate that at the condition of basicity more than 0.85, the melting temperature and viscosity of mould fluxes would be increased with the increasing of RE_xO_y in mould fluxes, which leads to the decreasing of dissolving capacity of in mould fluxes. At the condition of basicity less than 0.80, the melting temperature and viscosity of mould fluxes would be decreased with the increasing of RE_xO_y in mould fluxes.

EFFECTS OF INCLUSION ON DRAWING PROPERTY OF HP295 CYLINDER STEEL

SONG Li-qiu

2003, 24(2): 14-18.

Abstract(19) PDF(1)

Abstract:
The influencing factors of drawing properties for the cylinder end-heads were analyzed by checking out the defect of cylinder end-heads which made of HP295 steel.Resultsshow that the crack at cylinder end-heads in drawing process is due to the concentrated RE inclusion in the steel. And its wrinkle defect is related to banding texture in the steel, uneven sheet thickness and drawing parameters.

TEST STUDY ON FeV50 SMELTING WITH VANADIUM TRIOXIDE IN ELECTROSILICOTHERMAL PROCESS

YANG Yang-jun, SUN Chao-hui, TANG Hong-guo, DU Yong

2003, 24(2): 19-23.

Abstract(19) PDF(2)

Abstract:
The technical process of production FeV50 by electrosilicothermal method using vanadium trioxide as raw materials was introduced. The effect of silicon match coefficient and slag composition on FeV50 ferrovanadium smelting was discussed. It is concluded that the ferrovanadium based on GB4139-87 standard can be fluently produced under the test selected conditions,and the average recovery rate of vanadium reaches 96.84%。

INFLUENCE FACTORS OF CASTABILITY FOR Al-KILLED STEEL AND ADOPTED MEASURES

TANG Li-dong, XIU Li-ce, WANG Tie-chen

2003, 24(2): 24-28.

Abstract(30) PDF(1)

Abstract:
The influencing factors of castability for Al-killed steel and it's acting mechanism were discussed. In order to reduce the inclusion source and accelerate the floating of inclusion, a series of technical measures were put forward and some good results were achieved, such as keeping moderate higher final carbon content, using Calcium-based flux, protecting cast, and increase the nozzle diameter etc.

MOLD ELECTROMAGNETIC STIRRING TECHNIQUE FOR CONTINUOUS CASTING

CHEN Yong

2003, 24(2): 29-33.

Abstract(23) PDF(2)

Abstract:
Metallurgical results of mold electromagnetic stirring(M-EMS) in continuous casting were comprehensively introduced, meanwhile, some problems associated with the application of M-EMS and their countermeasures were also discussed. It is considered that the combination stirring (M+F-EMS) should be employed to newly built bloom continuous caster at PZH Steel, and the mold electromagnetic stirring parameters should be optimized in order to fully realize the advantages of M-EMS.

A REVIEW ON TWO PROCESSES FOR USE OF PANZHIHUA ILMENITE

DENG Guo-zhu, YU Wen-hua

2003, 24(2): 34-38.

Abstract(40) PDF(3)

Abstract:
Two processes for use of Panzhihua ilmenite according to the features of the ilmenite and energy resources of Panzhihua area are described:(1) titanium dioxide is produced by sulphate process from the ilmenite or titania slag made from smelting the ilmenite by elctric-arc furnace method; (2) titanium dioxide or sponge titanium is produced by chloride process form synthetic rutile made from the ilmenite by hydrochloric acid leaching method. The advantages and disadvantages between the two processes are also presented.

PRINCIPLE OF VANADIUM - HYDROGEN REACTION AND DEVELOPMENT OF VANADIUM BASE SOLID SOLUTION HYDROGEN ALLOY

ZHAO Gang, LIU Shou-ping, ZHOU Shang-qi, LI Rong, REN Qin

2003, 24(2): 39-43.

Abstract(13) PDF(1)

Abstract:
Vanadium base solid solution hydrogen alloy is a kind of the high performance materials developed in recent years. The reaction principle of vanadium and hydrogen and the characteristics of vanadium base solid solution hydrogen material are introduced. The recent advance in development and research of vanadium base solid solution hydrogen alloys is described.

DEVELOPMENT OF HIGH-STRENGTH MICROALLOYED STEEL Q390Eq

XIA Mao-sen, JIANG Shan-yu

2003, 24(2): 44-48.

Abstract(20) PDF(1)

Abstract:
In the course of development for high-strength microalloyed Q390Eq steel plate, the technology of Nb+Al or V+Al microalloying and controlled rolling (CR) were applied. Some analyses on its production process,mechanics properties and welding performances were carried out. The suitable composition of Q390Eq for bridge use and its CR parameters were established. The results are also useful for the development of other microalloyed steel plate with high strength and toughness.

PREPARATION OF RUTILE NANOMETER TITANIA APPLICABLE TO VLTRA-VIOLET SCREENING

WANG Lan-wu

2003, 24(2): 49-51.

Abstract(20) PDF(1)

Abstract:
Using TiO(OH)₂ as raw material to prepare rutile nanometer titania applicable to ultra-violet screening by employing of Sol-Gel method was studied. The study concentrated on the influence of the amount of rutile accelerator, reaction temperature, calcining temperature and duration against the rate of crystalline phase transition of tiania and crystal dimension. The effects of nanometer titania crystal dimension on the absorption of ultra violet was also discussed.

STUDY ON APPLICATION OF RUTILE NANOMETER TITANIA IN PAINT

YANG Lu-bo

2003, 24(2): 52-56.

Abstract(28) PDF(1)

Abstract:
The effects of ultraviolet ray absorption agent CIBA5151 and rutile nanometer titania which were coated with a film of organic or inorganic compound on the properties of paint were compared. In the course, the influences of the addition amount of rutile nanometer titania against the cohesion,flexibility, impact resistance and ageing resistance of the paint was mainly concentrated on. It shows that adding suitable amount of rutile nanometer titania can improve ageing resistance and mechanics properties of paint.

CURRENT SITUATIONS OF TITANIUM INDUSTRY AND PRODUCTION TECHNIQUES DEVELOPMENT FOR TITANIUM IN JAPAN

ZHU Min-zhi

2003, 24(2): 57-60.

Abstract(22) PDF(2)

Abstract:
Titanium products are of good performance, such as light weight, high strength, excellent heat-resistant property and so on. The use of titanium and the technical situations of titanium productive enterprise in Japan were described in this paper. At present Ishihara Sangyo, Toho Titanium and Sumitomo Titanium are the major producers of raw titanium in Japan. And the major titanium product suppliers are Kobe Steel, Sumitomo Metal and NSC.

CURRENT SITUATIONS AND TECHNICAL PROGRESSES FOR PREPARATION VANADIUM DIOXIDE POWDER

GUO Ning, HE Yan-chun, QIU Jia-wen

2003, 24(2): 61-64.

Abstract(18) PDF(1)

Abstract:
Vanadium dioxide is a kind of thermochromic materials and can undergo reversible thermal-induced semiconductor-metal transition,so it can be used in many fields. Many kinds of preparation methods of vanadium dioxide powder were summarized,and the tendency of the technique for preparing vanadium dioxide powder was pointed out.

2003 Vol. 24, No. 2