钢铁钒钛

Study on Catalytic Mechanism of Gas-based Reduction of Iron Ore

ZHANG Linfeng, GUO Peimin, ZHAO Pei

2008, 29(1): 1-5.

Abstract(75) PDF(3)

Abstract:
Influence of alkali salt on gas-based reduction of iron ore was studied.For the same cation,the sequences of the catalytic effect F^->Cl^->I^->Br^- and NO₃^->OH^->CO₃^2->SO₄^2->PO₄^3- are shown. The new catalytic mechanism was proposed.Upon this theory,the catalytic effect of catalyst is...

Research on Combustion Behavior of Powdered Coal Injection in Corex Smelting-gasifier

CAO Xirong, ZHANG Binghuai, JIA Guoli, YANG Haibin, ZHANG Tao, PENG Huaguo

2008, 29(1): 6-9.

Abstract(59) PDF(1)

Abstract:
The corex smelting reduction was a new kind of ironmaking process.The process need lump coal to maintain production,though coke is not necessary material for it.Powdered coal injection in corex smelting-gasifier was proposed in order to replace lump coal and make full use of powdered coal.The experi...

Effect of Annealing Processes on Microstructures and Textures of a Nb-Ti-IF Steel

ZHENG Zhiwang, WANG Minli

2008, 29(1): 10-16.

Abstract(84) PDF(1)

Abstract:
According to the processes of continuous hot-dip galvanizing lines,an industrially hot rolled and cold rolled Nb-Ti-IF steel was used to study the effect of annealing processes on the microstructures and recrystallization textures.The results showed that the steel was fully recrystallised above an a...

Causes and Effects of Network Cracks in Continuously Cast Slab

CHEN Yong, ZHAO Zhangliang, SUN Yanhui, CAI Kaike

2008, 29(1): 17-22.

Abstract(74) PDF(2)

Abstract:
The results of microscope,SEM,TEM and EDS revealed that the particles precipitated in the preaustenite grain boundaries will result in network cracks under sufficient stress such as thermal stress,bending and straightening stress due to uneven cooling of strand surface.The influence of the carbon co...

Effect of Heat Treatment Temperature on Microstructure and Properties of Dual-phase Steel Containing Chromium

ZHANG Kai-hua

2008, 29(1): 23-26,33.

Abstract(67) PDF(1)

Abstract:
The microstructure and properties of two series of galvanized dual-phase steel were researched with different heat treatment temperature at labor.The results show that pearlite exists at 780℃heat treatment. The microstructure of dual-phase steel is ferrite+martenite when heat treatment temperature i...

Simulation of Mold Flow Field for the High Speed Slab Continuous Casting

WANG Yongsheng, GU Wu'an, WANG Xinhua, WANG Wanjun

2008, 29(1): 27-33.

Abstract(82) PDF(1)

Abstract:
With mathematical simulation,the influence of process parameter,such as submerged nozzle structure、flow control switch、outlet angle、submerged depth of nozzle、width and thickness of mold、argon blowing etc on fluid flow in mold,fluctuation and primary slab shell are studied in high speed continuous ca...

Experiments of Strain Ageing Sensibility of NVB Ship Plate Steel

HOU Dengyi, XU Hongqing, CHEN Ye

2008, 29(1): 34-37.

Abstract(71) PDF(1)

Abstract:
The effect of different plastic deformation strain ageing on the performance of NVB ship plate steel has been studied which includes strength,ductility,low temperature toughness and brittle-ductile transition temperature.As a result,NVB ship plate steel is less sensitive to strain ageing,and after 5...

Study on Wear Resistance of High Cr-Ni Indefinite Chill Cast Iron Roller

WANG Jiang, HAN Jingtao, LIU Junxian

2008, 29(1): 38-42.

Abstract(100) PDF(1)

Abstract:
The wear resistance test for high Cr-Ni alloy indefinite chill cast iron roller was studied on a self-developed high temperature sliding wear and thermo-contact fatigue test machine.The surface morphology and surface structure of the roller were analyzed by surface copying technology,metallography a...

Research on Secondary Refining Technology for Low-sulfur and High Strength Weathering Steel

RAN Menglun

2008, 29(1): 43-47,60.

Abstract(75) PDF(1)

Abstract:
Secondary refining technology for low-sulfur and high strength weathering steel was introduced,especially LF.The service condition and effect of the new material(the vanadium-titanium-micralloyed coreline)were detailed.As a result,the production became economic and efficient.Practice shows that thro...

Research on Quantity of Coating Compact SiO₂ Film on the Surface of TiO₂

LI Qin, HU Hongfei, HOU Shengdong, CHEN Deming, WU Liangying, WEI Chang

2008, 29(1): 48-53.

Abstract(62) PDF(2)

Abstract:
Infulence of thermodynamics and salinity as agent on film formation are discussed,the minimum and maximum coating quantity of compact SiO₂ on the surface of TiO₂ are pointed out in this paper.On the basis of the analysis,coating test with different quantities of SiO₂ on the surface of TiO₂ are carri...

Influence of MgO Content on Productivity and Quality of V-bearing Titaniferous Magnetite Sinter

GAN Qin, HE Qun, WEN Yongcai

2008, 29(1): 54-60.

Abstract(72) PDF(1)

Abstract:
According to the actual production conditions of Panzhihua Iron and Steel Group Co.,influence of MgO on productivity and quality of sinter was investigated in laboratory.The result showed that strength,production yield and metallurgical properties of sinter trends to improve with increasing of MgO c...

Study on Character at High Temperature and Requirement of Mold Fluxes for 2Cr13 Stainless Steel

WANG Wenxue, LIU Cailing, WANG Yu, YANG Ladao, ZUO Yanbing

2008, 29(1): 61-65.

Abstract(79) PDF(1)

Abstract:
The DIL402C thermal dilatometer,STA449C thermal analyzer,the type Gleeble-1500D thermal simulation testing machine were employed to test the linear expansion coefficient,major phase change temperature,mechanic properties at high temperature of 2Cr13.The effect of these properties at high temperature...

Phase Transformation and Second-phase Precipitation Behavior of Nb-Ti Microalloyed Steel during Cooling after Deformation

WU Xinlang, ZHAO Zhengzhi, TIAN Yun, TANG Di, LIU Guangming, DAI Xiaoli, XIONG Aiming

2008, 29(1): 66-70.

Abstract(75) PDF(1)

Abstract:
The phase transformation behavior of Nb-Ti microalloyed steel during cooling process after deformation was studied by the Gleeble-2000 thermomechanical experiment simulator and by means of a combined method of microscopic hardness measurement.In addition,both second-phase precipitation behavior duri...

Investigation of Spectroscopic Analysis on Titanium in Ferroalloy

LIU Ping, YANG Junhong

2008, 29(1): 71-74.

Abstract(82) PDF(1)

Abstract:
Characteristic of visible light spectrum was studied on titanium in ferroalloy by digital analysis system with grating spectroscope and prism spectroscope.The visible light spectrums of titanium and iron were simulated by computer and digital spectrums were shot by digital analysis system.The resear...

2008 Vol. 29, No. 1